Accepting request 917731 from devel:libraries:c_c++
- new upstream website - drop multibuild - tests do not require static library anymore - spec file cleanup - drop sources that were re-added to upstream distibution (c-ares-config.cmake.in ares_dns.h libcares.pc.cmake) - 5c995d5.patch: augment input validation on hostnames to allow _ as part of DNS response (bsc#1190225) OBS-URL: https://build.opensuse.org/request/show/917731 OBS-URL: https://build.opensuse.org/package/show/openSUSE:Factory/c-ares?expand=0&rev=14
This commit is contained in:
Dominique Leuenberger
Git OBS Bridge
commit
2572151cd5
51
5c995d5.patch
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51
5c995d5.patch
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@ -0,0 +1,51 @@
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From 5c995d50b05a2c374ae021012afa6f8f4cf2957e Mon Sep 17 00:00:00 2001
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From: bradh352 <brad@brad-house.com>
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Date: Wed, 8 Sep 2021 07:38:44 -0400
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Subject: [PATCH] ares_expand_name should allow underscores (_) as SRV records
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legitimately use them
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c-ares 1.17.2 introduced response validation to prevent a security issue, however
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it did not have (_) listed as a valid character for domain name responses which
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caused issues when a CNAME referenced a SRV record which contained underscores.
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While RFC2181 section 11 does explicitly state not to do validation, that applies
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to servers not clients.
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Fixes: #424
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Fix By: Brad House (@bradh352)
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---
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src/lib/ares_expand_name.c | 12 +++++++++---
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1 file changed, 9 insertions(+), 3 deletions(-)
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diff --git a/src/lib/ares_expand_name.c b/src/lib/ares_expand_name.c
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index a62c982e..db262ab4 100644
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--- a/src/lib/ares_expand_name.c
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+++ b/src/lib/ares_expand_name.c
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@@ -59,10 +59,16 @@ static int ares__isprint(int ch)
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return 0;
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}
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-/* Character set allowed by hostnames */
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+/* Character set allowed by hostnames. This is to include the normal
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+ * domain name character set plus underscores which are used in SRV
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+ * records. While RFC 2181 section 11 does state not to do validation,
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+ * that applies to servers, not clients. Vulnerabilities have been
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+ * reported when this validation is not performed. Security is more
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+ * important than edge-case compatibility (which is probably invalid
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+ * anyhow). */
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static int is_hostnamech(int ch)
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{
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- /* [A-Za-z0-9-.]
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+ /* [A-Za-z0-9-._]
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* Don't use isalnum() as it is locale-specific
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*/
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if (ch >= 'A' && ch <= 'Z')
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@@ -71,7 +77,7 @@ static int is_hostnamech(int ch)
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return 1;
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if (ch >= '0' && ch <= '9')
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return 1;
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- if (ch == '-' || ch == '.')
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+ if (ch == '-' || ch == '.' || ch == '_')
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return 1;
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return 0;
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@ -1,4 +0,0 @@
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<multibuild>
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<package>main</package>
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<package>tests</package>
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</multibuild>
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112
ares_dns.h
112
ares_dns.h
@ -1,112 +0,0 @@
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#ifndef HEADER_CARES_DNS_H
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#define HEADER_CARES_DNS_H
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/* Copyright 1998, 2011 by the Massachusetts Institute of Technology.
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*
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* Permission to use, copy, modify, and distribute this
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* software and its documentation for any purpose and without
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* fee is hereby granted, provided that the above copyright
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* notice appear in all copies and that both that copyright
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* notice and this permission notice appear in supporting
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* documentation, and that the name of M.I.T. not be used in
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* advertising or publicity pertaining to distribution of the
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* software without specific, written prior permission.
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* M.I.T. makes no representations about the suitability of
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* this software for any purpose. It is provided "as is"
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* without express or implied warranty.
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*/
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/*
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* NOTE TO INTEGRATORS:
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*
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* This header is made public due to legacy projects relying on it.
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* Please do not use the macros within this header, or include this
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* header in your project as it may be removed in the future.
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*/
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/*
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* Macro DNS__16BIT reads a network short (16 bit) given in network
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* byte order, and returns its value as an unsigned short.
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*/
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#define DNS__16BIT(p) ((unsigned short)((unsigned int) 0xffff & \
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(((unsigned int)((unsigned char)(p)[0]) << 8U) | \
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((unsigned int)((unsigned char)(p)[1])))))
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/*
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* Macro DNS__32BIT reads a network long (32 bit) given in network
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* byte order, and returns its value as an unsigned int.
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*/
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#define DNS__32BIT(p) ((unsigned int) \
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(((unsigned int)((unsigned char)(p)[0]) << 24U) | \
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((unsigned int)((unsigned char)(p)[1]) << 16U) | \
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((unsigned int)((unsigned char)(p)[2]) << 8U) | \
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((unsigned int)((unsigned char)(p)[3]))))
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#define DNS__SET16BIT(p, v) (((p)[0] = (unsigned char)(((v) >> 8) & 0xff)), \
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((p)[1] = (unsigned char)((v) & 0xff)))
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#define DNS__SET32BIT(p, v) (((p)[0] = (unsigned char)(((v) >> 24) & 0xff)), \
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((p)[1] = (unsigned char)(((v) >> 16) & 0xff)), \
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((p)[2] = (unsigned char)(((v) >> 8) & 0xff)), \
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((p)[3] = (unsigned char)((v) & 0xff)))
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#if 0
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/* we cannot use this approach on systems where we can't access 16/32 bit
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data on un-aligned addresses */
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#define DNS__16BIT(p) ntohs(*(unsigned short*)(p))
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#define DNS__32BIT(p) ntohl(*(unsigned long*)(p))
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#define DNS__SET16BIT(p, v) *(unsigned short*)(p) = htons(v)
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#define DNS__SET32BIT(p, v) *(unsigned long*)(p) = htonl(v)
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#endif
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/* Macros for parsing a DNS header */
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#define DNS_HEADER_QID(h) DNS__16BIT(h)
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#define DNS_HEADER_QR(h) (((h)[2] >> 7) & 0x1)
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#define DNS_HEADER_OPCODE(h) (((h)[2] >> 3) & 0xf)
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#define DNS_HEADER_AA(h) (((h)[2] >> 2) & 0x1)
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#define DNS_HEADER_TC(h) (((h)[2] >> 1) & 0x1)
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#define DNS_HEADER_RD(h) ((h)[2] & 0x1)
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#define DNS_HEADER_RA(h) (((h)[3] >> 7) & 0x1)
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#define DNS_HEADER_Z(h) (((h)[3] >> 4) & 0x7)
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#define DNS_HEADER_RCODE(h) ((h)[3] & 0xf)
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#define DNS_HEADER_QDCOUNT(h) DNS__16BIT((h) + 4)
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#define DNS_HEADER_ANCOUNT(h) DNS__16BIT((h) + 6)
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#define DNS_HEADER_NSCOUNT(h) DNS__16BIT((h) + 8)
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#define DNS_HEADER_ARCOUNT(h) DNS__16BIT((h) + 10)
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/* Macros for constructing a DNS header */
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#define DNS_HEADER_SET_QID(h, v) DNS__SET16BIT(h, v)
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#define DNS_HEADER_SET_QR(h, v) ((h)[2] |= (unsigned char)(((v) & 0x1) << 7))
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#define DNS_HEADER_SET_OPCODE(h, v) ((h)[2] |= (unsigned char)(((v) & 0xf) << 3))
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#define DNS_HEADER_SET_AA(h, v) ((h)[2] |= (unsigned char)(((v) & 0x1) << 2))
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#define DNS_HEADER_SET_TC(h, v) ((h)[2] |= (unsigned char)(((v) & 0x1) << 1))
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#define DNS_HEADER_SET_RD(h, v) ((h)[2] |= (unsigned char)((v) & 0x1))
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#define DNS_HEADER_SET_RA(h, v) ((h)[3] |= (unsigned char)(((v) & 0x1) << 7))
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#define DNS_HEADER_SET_Z(h, v) ((h)[3] |= (unsigned char)(((v) & 0x7) << 4))
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#define DNS_HEADER_SET_RCODE(h, v) ((h)[3] |= (unsigned char)((v) & 0xf))
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#define DNS_HEADER_SET_QDCOUNT(h, v) DNS__SET16BIT((h) + 4, v)
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#define DNS_HEADER_SET_ANCOUNT(h, v) DNS__SET16BIT((h) + 6, v)
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#define DNS_HEADER_SET_NSCOUNT(h, v) DNS__SET16BIT((h) + 8, v)
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#define DNS_HEADER_SET_ARCOUNT(h, v) DNS__SET16BIT((h) + 10, v)
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/* Macros for parsing the fixed part of a DNS question */
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#define DNS_QUESTION_TYPE(q) DNS__16BIT(q)
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#define DNS_QUESTION_CLASS(q) DNS__16BIT((q) + 2)
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/* Macros for constructing the fixed part of a DNS question */
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#define DNS_QUESTION_SET_TYPE(q, v) DNS__SET16BIT(q, v)
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#define DNS_QUESTION_SET_CLASS(q, v) DNS__SET16BIT((q) + 2, v)
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/* Macros for parsing the fixed part of a DNS resource record */
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#define DNS_RR_TYPE(r) DNS__16BIT(r)
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#define DNS_RR_CLASS(r) DNS__16BIT((r) + 2)
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#define DNS_RR_TTL(r) DNS__32BIT((r) + 4)
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#define DNS_RR_LEN(r) DNS__16BIT((r) + 8)
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/* Macros for constructing the fixed part of a DNS resource record */
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#define DNS_RR_SET_TYPE(r, v) DNS__SET16BIT(r, v)
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#define DNS_RR_SET_CLASS(r, v) DNS__SET16BIT((r) + 2, v)
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#define DNS_RR_SET_TTL(r, v) DNS__SET32BIT((r) + 4, v)
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#define DNS_RR_SET_LEN(r, v) DNS__SET16BIT((r) + 8, v)
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#endif /* HEADER_CARES_DNS_H */
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@ -1,21 +0,0 @@
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@PACKAGE_INIT@
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set_and_check(c-ares_INCLUDE_DIR "@PACKAGE_CMAKE_INSTALL_INCLUDEDIR@")
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include("${CMAKE_CURRENT_LIST_DIR}/c-ares-config-version.cmake")
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include("${CMAKE_CURRENT_LIST_DIR}/c-ares-targets.cmake")
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set(c-ares_LIBRARY c-ares::cares)
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if(@CARES_SHARED@)
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add_library(c-ares::cares_shared INTERFACE IMPORTED)
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set_target_properties(c-ares::cares_shared PROPERTIES INTERFACE_LINK_LIBRARIES "c-ares::cares")
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set(c-ares_SHARED_LIBRARY c-ares::cares_shared)
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elseif(@CARES_STATIC@)
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add_library(c-ares::cares_static INTERFACE IMPORTED)
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set_target_properties(c-ares::cares_static PROPERTIES INTERFACE_LINK_LIBRARIES "c-ares::cares")
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endif()
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if(@CARES_STATIC@)
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set(c-ares_STATIC_LIBRARY c-ares::cares_static)
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endif()
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@ -1,3 +1,18 @@
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-------------------------------------------------------------------
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Thu Sep 9 12:15:01 UTC 2021 - Adam Majer <adam.majer@suse.de>
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- new upstream website
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- drop multibuild - tests do not require static library anymore
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- spec file cleanup
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- drop sources that were re-added to upstream distibution
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(c-ares-config.cmake.in ares_dns.h libcares.pc.cmake)
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-------------------------------------------------------------------
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Wed Sep 8 14:07:34 UTC 2021 - Adam Majer <adam.majer@suse.de>
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- 5c995d5.patch: augment input validation on hostnames to allow _
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as part of DNS response (bsc#1190225)
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-------------------------------------------------------------------
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Thu Aug 12 13:59:07 UTC 2021 - Adam Majer <adam.majer@suse.de>
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53
c-ares.spec
53
c-ares.spec
@ -16,23 +16,6 @@
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#
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%global flavor @BUILD_FLAVOR@%{nil}
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%if "%{flavor}" == "%{nil}"
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ExclusiveArch: do_not_build
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%define pname c-ares
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%endif
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%if "%{flavor}" == "tests"
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%define pname c-ares-tests
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%bcond_without tests
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%endif
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%if "%{flavor}" == "main"
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%define pname c-ares
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%bcond_with tests
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%endif
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%define sonum 2
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%define libname libcares%{sonum}
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@ -40,29 +23,24 @@ ExclusiveArch: do_not_build
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%define cmake_build make -O VERBOSE=1 %{?_smp_mflags}
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%endif
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Name: %{pname}
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Name: c-ares
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Version: 1.17.2
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Release: 0
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Summary: Library for asynchronous name resolves
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License: MIT
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URL: https://c-ares.haxx.se/
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Source0: http://c-ares.haxx.se/download/c-ares-%{version}.tar.gz
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Source1: http://c-ares.haxx.se/download/c-ares-%{version}.tar.gz.asc
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URL: https://c-ares.org/
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Source0: https://c-ares.org/download/c-ares-%{version}.tar.gz
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Source1: https://c-ares.org/download/c-ares-%{version}.tar.gz.asc
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Source3: c-ares.keyring
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Source4: baselibs.conf
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### REMOVE when upstream fixes https://github.com/c-ares/c-ares/issues/373
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Source5: libcares.pc.cmake
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Source6: c-ares-config.cmake.in
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Source7: ares_dns.h
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Patch0: 0001-Use-RPM-compiler-options.patch
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Patch1: disable-live-tests.patch
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Patch2: https://github.com/c-ares/c-ares/commit/5c995d5.patch
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BuildRequires: cmake
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BuildRequires: gcc-c++
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%if %{with tests}
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BuildRequires: pkg-config
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# Needed for getservbyport_r function to work properly.
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BuildRequires: netcfg
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%endif
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BuildRequires: pkg-config
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%description
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c-ares is a C library that performs DNS requests and name resolves
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@ -106,35 +84,20 @@ by Greg Hudson at MIT.
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This package provides the development libraries and headers needed
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to build packages that depend on c-ares.
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%prep
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%autosetup -p1 -n c-ares-%{version}
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cp %{S:5} %{S:6} .
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cp %{S:7} include
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%build
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%cmake \
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%if %{with tests}
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-DCARES_BUILD_TESTS:BOOL=ON \
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%endif
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%{nil}
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%cmake -DCARES_BUILD_TESTS:BOOL=ON
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%cmake_build
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%install
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%if !%{with tests}
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%cmake_install
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%endif
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%if %{with tests}
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%check
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pushd build
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%cmake_build -C test
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LD_LIBRARY_PATH=.%_libdir:./%_lib ./bin/arestest
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%endif
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%if !%{with tests}
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%post -n %{libname} -p /sbin/ldconfig
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%postun -n %{libname} -p /sbin/ldconfig
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@ -160,6 +123,4 @@ LD_LIBRARY_PATH=.%_libdir:./%_lib ./bin/arestest
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%{_libdir}/pkgconfig/libcares.pc
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%{_libdir}/cmake/c-ares/
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%endif
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%changelog
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@ -1,20 +0,0 @@
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#***************************************************************************
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# Project ___ __ _ _ __ ___ ___
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# / __|____ / _` | '__/ _ \/ __|
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# | (_|_____| (_| | | | __/\__ \
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# \___| \__,_|_| \___||___/
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#
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prefix=@CMAKE_INSTALL_PREFIX@
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exec_prefix=${prefix}/@CMAKE_INSTALL_BINDIR@
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libdir=${prefix}/@CMAKE_INSTALL_LIBDIR@
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includedir=${prefix}/@CMAKE_INSTALL_INCLUDEDIR@
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Name: c-ares
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URL: https://c-ares.haxx.se/
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Description: asynchronous DNS lookup library
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Version: @CARES_VERSION@
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Requires:
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Requires.private:
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Cflags: -I${includedir} @CPPFLAG_CARES_STATICLIB@
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Libs: -L${libdir} -lcares
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Libs.private: @CARES_PRIVATE_LIBS@
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