Accepting request 1042851 from network
OBS-URL: https://build.opensuse.org/request/show/1042851 OBS-URL: https://build.opensuse.org/package/show/openSUSE:Factory/krb5?expand=0&rev=162
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commit
040abea7ab
@ -1,45 +0,0 @@
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From 74444508aa249bf8d34865e25413c6432e7583b4 Mon Sep 17 00:00:00 2001
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From: Greg Hudson <ghudson@mit.edu>
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Date: Tue, 3 Aug 2021 01:15:27 -0400
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Subject: [PATCH] Fix KDC null deref on TGS inner body null server
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After the KDC decodes a FAST inner body, it does not check for a null
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server. Prior to commit 39548a5b17bbda9eeb63625a201cfd19b9de1c5b this
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would typically result in an error from krb5_unparse_name(), but with
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the addition of get_local_tgt() it results in a null dereference. Add
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a null check.
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Reported by Joseph Sutton of Catalyst.
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CVE-2021-37750:
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In MIT krb5 releases 1.14 and later, an authenticated attacker can
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cause a null dereference in the KDC by sending a FAST TGS request with
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no server field.
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ticket: 9008 (new)
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tags: pullup
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target_version: 1.19-next
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target_version: 1.18-next
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(cherry picked from commit d775c95af7606a51bf79547a94fa52ddd1cb7f49)
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---
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src/kdc/do_tgs_req.c | 5 +++++
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1 file changed, 5 insertions(+)
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Index: krb5-1.19.3/src/kdc/do_tgs_req.c
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===================================================================
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--- krb5-1.19.3.orig/src/kdc/do_tgs_req.c
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+++ krb5-1.19.3/src/kdc/do_tgs_req.c
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@@ -212,6 +212,11 @@ process_tgs_req(krb5_kdc_req *request, k
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errcode = KRB5KDC_ERR_S_PRINCIPAL_UNKNOWN;
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goto cleanup;
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}
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+ if (sprinc == NULL) {
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+ status = "NULL_SERVER";
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+ errcode = KRB5KDC_ERR_S_PRINCIPAL_UNKNOWN;
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+ goto cleanup;
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+ }
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errcode = get_local_tgt(kdc_context, &sprinc->realm, header_server,
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&local_tgt, &local_tgt_storage, &local_tgt_key);
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@ -1,3 +1,9 @@
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-------------------------------------------------------------------
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Tue Dec 13 10:49:47 UTC 2022 - Samuel Cabrero <scabrero@suse.de>
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- Drop 0009-Fix-KDC-null-deref-on-TGS-inner-body-null-server.patch,
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already fixed in release 1.20.0
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-------------------------------------------------------------------
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Wed Nov 16 07:49:09 UTC 2022 - Samuel Cabrero <scabrero@suse.de>
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@ -44,7 +44,6 @@ Patch5: 0005-krb5-1.6.3-ktutil-manpage.patch
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Patch6: 0006-krb5-1.12-api.patch
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Patch7: 0007-SELinux-integration.patch
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Patch8: 0008-krb5-1.9-debuginfo.patch
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Patch9: 0009-Fix-KDC-null-deref-on-TGS-inner-body-null-server.patch
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BuildRequires: autoconf
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BuildRequires: bison
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BuildRequires: keyutils
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@ -1,3 +1,9 @@
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-------------------------------------------------------------------
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Tue Dec 13 10:49:47 UTC 2022 - Samuel Cabrero <scabrero@suse.de>
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- Drop 0009-Fix-KDC-null-deref-on-TGS-inner-body-null-server.patch,
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already fixed in release 1.20.0
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-------------------------------------------------------------------
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Wed Nov 16 07:49:09 UTC 2022 - Samuel Cabrero <scabrero@suse.de>
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@ -42,7 +42,6 @@ Patch5: 0005-krb5-1.6.3-ktutil-manpage.patch
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Patch6: 0006-krb5-1.12-api.patch
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Patch7: 0007-SELinux-integration.patch
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Patch8: 0008-krb5-1.9-debuginfo.patch
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Patch9: 0009-Fix-KDC-null-deref-on-TGS-inner-body-null-server.patch
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BuildRequires: autoconf
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BuildRequires: bison
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BuildRequires: cyrus-sasl-devel
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