diff --git a/tcpdump-CVE-2020-8037.patch b/tcpdump-CVE-2020-8037.patch new file mode 100644 index 0000000..3ba237b --- /dev/null +++ b/tcpdump-CVE-2020-8037.patch @@ -0,0 +1,63 @@ +From 32027e199368dad9508965aae8cd8de5b6ab5231 Mon Sep 17 00:00:00 2001 +From: Guy Harris +Date: Sat, 18 Apr 2020 14:04:59 -0700 +Subject: [PATCH] PPP: When un-escaping, don't allocate a too-large buffer. + +The buffer should be big enough to hold the captured data, but it +doesn't need to be big enough to hold the entire on-the-network packet, +if we haven't captured all of it. + +(backported from commit e4add0b010ed6f2180dcb05a13026242ed935334) +--- + print-ppp.c | 18 ++++++++++++++---- + 1 file changed, 14 insertions(+), 4 deletions(-) + +diff --git a/print-ppp.c b/print-ppp.c +index 891761728..33fb03412 100644 +--- a/print-ppp.c ++++ b/print-ppp.c +@@ -1367,19 +1367,29 @@ print_bacp_config_options(netdissect_options *ndo, + return 0; + } + ++/* ++ * Un-escape RFC 1662 PPP in HDLC-like framing, with octet escapes. ++ * The length argument is the on-the-wire length, not the captured ++ * length; we can only un-escape the captured part. ++ */ + static void + ppp_hdlc(netdissect_options *ndo, + const u_char *p, int length) + { ++ u_int caplen = ndo->ndo_snapend - p; + u_char *b, *t, c; + const u_char *s; +- int i, proto; ++ u_int i; ++ int proto; + const void *se; + ++ if (caplen == 0) ++ return; ++ + if (length <= 0) + return; + +- b = (u_char *)malloc(length); ++ b = (u_char *)malloc(caplen); + if (b == NULL) + return; + +@@ -1388,10 +1398,10 @@ ppp_hdlc(netdissect_options *ndo, + * Do this so that we dont overwrite the original packet + * contents. + */ +- for (s = p, t = b, i = length; i > 0 && ND_TTEST(*s); i--) { ++ for (s = p, t = b, i = caplen; i != 0; i--) { + c = *s++; + if (c == 0x7d) { +- if (i <= 1 || !ND_TTEST(*s)) ++ if (i <= 1) + break; + i--; + c = *s++ ^ 0x20; diff --git a/tcpdump.changes b/tcpdump.changes index 193707c..0b68309 100644 --- a/tcpdump.changes +++ b/tcpdump.changes @@ -1,3 +1,10 @@ +------------------------------------------------------------------- +Thu Nov 5 10:58:11 UTC 2020 - Pedro Monreal + +- Security fix: [bsc#1178466, CVE-2020-8037] + * PPP decapsulator: Allocate the right buffer size +- Add tcpdump-CVE-2020-8037.patch + ------------------------------------------------------------------- Fri Dec 13 17:21:34 UTC 2019 - Michel Normand @@ -12,7 +19,7 @@ Tue Oct 15 07:53:47 UTC 2019 - Martin Pluskal ------------------------------------------------------------------- Wed Oct 2 14:01:31 UTC 2019 - Pedro Monreal Gonzalez -- Update to 4.9.3 +- Update to 4.9.3 [bsc#1153098] * Fix buffer overflow/overread vulnerabilities: - CVE-2017-16808 (AoE) - CVE-2018-14468 (FrameRelay) diff --git a/tcpdump.spec b/tcpdump.spec index 71c585b..517755e 100644 --- a/tcpdump.spec +++ b/tcpdump.spec @@ -1,7 +1,7 @@ # # spec file for package tcpdump # -# Copyright (c) 2019 SUSE LINUX GmbH, Nuernberg, Germany. +# Copyright (c) 2020 SUSE LLC # # All modifications and additions to the file contributed by third parties # remain the property of their copyright owners, unless otherwise agreed @@ -29,6 +29,8 @@ Source2: https://www.tcpdump.org/release/%{name}-%{version}.tar.gz.sig Source3: https://www.tcpdump.org/tcpdump-workers.asc#/%{name}.keyring # PATCH-FIX-OPENSUSE tcpdump-CVE-2018-19519.patch - Initialize buf in print-hncp.c:print_prefix Patch0: tcpdump-CVE-2018-19519.patch +# PATCH-FIX-UPSTREAM bsc#1178466 CVE-2020-8037 PPP decapsulator: Allocate the right buffer size +Patch1: tcpdump-CVE-2020-8037.patch BuildRequires: libpcap-devel >= %{min_libpcap_version} BuildRequires: libsmi-devel BuildRequires: openssl-devel @@ -40,7 +42,7 @@ ethernet. It can be used to debug specific network problems. %prep %setup -q -%patch0 -p1 +%autopatch -p1 %build # guessing TSO needed in print-ip.c