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increase SASL auth buffer size for large Kerberos tickets (RHEL-213588)

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Resolves: RHEL-213588
This commit is contained in:
Michal Hlavinka 2026-08-03 11:11:24 +02:00
parent ae20204257
commit 396dec62a6
2 changed files with 20 additions and 1 deletions
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12
dovecot-2.3-tokensize.patch Normal file
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@ -0,0 +1,12 @@
diff -up dovecot-2.3.21/src/login-common/client-common.h.tokensize dovecot-2.3.21/src/login-common/client-common.h
--- dovecot-2.3.21/src/login-common/client-common.h.tokensize
+++ dovecot-2.3.21/src/login-common/client-common.h
@@ -26,7 +26,7 @@
#define LOGIN_MAX_OUTBUF_SIZE 4096
/* Max. length of SASL authentication buffer. */
-#define LOGIN_MAX_AUTH_BUF_SIZE 8192
+#define LOGIN_MAX_AUTH_BUF_SIZE 65536
/* Disconnect client after this many milliseconds if it hasn't managed
to log in yet. */

9
dovecot.spec
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@ -6,7 +6,7 @@ Name: dovecot
Epoch: 1
Version: 2.3.16
%global prever %{nil}
Release: 19%{?dist}
Release: 20%{?dist}
#dovecot itself is MIT, a few sources are PD, pigeonhole is LGPLv2
License: MIT and LGPLv2
@ -97,6 +97,9 @@ Patch36: dovecot-2.3-cve-2026-27857p5of5.patch
# https://github.com/dovecot/core/commit/da1438c76b797f055d4ad7f0eaa17e5e29ca31ee
Patch37: dovecot-2.3-cve-2026-42006.patch
# sent upstream, RHEL-213588
Patch38: dovecot-2.3-tokensize.patch
BuildRequires: gcc, gcc-c++, openssl-devel, pam-devel, zlib-devel, bzip2-devel, libcap-devel
BuildRequires: libtool, autoconf, automake, pkgconfig
BuildRequires: sqlite-devel
@ -212,6 +215,7 @@ mv dovecot-2.3-pigeonhole-%{pigeonholever} dovecot-pigeonhole
%patch -P 35 -p1 -b .cve-2026-27857p4of5
%patch -P 36 -p1 -b .cve-2026-27857p5of5
%patch -P 37 -p1 -b .cve-2026-42006
%patch -P 38 -p1 -b .tokensize
cp run-test-valgrind.supp dovecot-pigeonhole/
# valgrind would fail with shell wrapper
echo "testsuite" >dovecot-pigeonhole/run-test-valgrind.exclude
@ -556,6 +560,9 @@ make check
%{_libdir}/%{name}/dict/libdriver_pgsql.so
%changelog
* Mon Aug 03 2026 Michal Hlavinka <mhlavink@redhat.com> - 1:2.3.16-20
- increase SASL auth buffer size for large Kerberos tickets (RHEL-213588)
* Fri Jun 26 2026 RHEL Packaging Agent <redhat-ymir-agent@redhat.com> - 1:2.3.16-19
- fix CVE-2026-42006: IMAP parser list_count_limit bypass via open
parentheses (RHEL-188479)