FreeBSD安全公告

FreeBSD-SA-07:08.openssl

发表: delphij 时间: 2007/10/04 06:01:27

-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 ============================================================================= FreeBSD-SA-07:08.openssl Security Advisory The FreeBSD Project Topic: Buffer overflow in OpenSSL SSL_get_shared_ciphers() Category: contrib Module: openssl Announced: 2007-10-03 Credits: Moritz Jodeit Affects: All FreeBSD releases. Corrected: 2007-10-03 21:39:43 UTC (RELENG_6, 6.2-STABLE) 2007-10-03 21:40:35 UTC (RELENG_6_2, 6.2-RELEASE-p8) 2007-10-03 21:41:22 UTC (RELENG_6_1, 6.1-RELEASE-p20) 2007-10-03 21:42:00 UTC (RELENG_5, 5.5-STABLE) 2007-10-03 21:42:32 UTC (RELENG_5_5, 5.5-RELEASE-p16) CVE Name: CVE-2007-5135 For general information regarding FreeBSD Security Advisories, including descriptions of the fields above, security branches, and the following sections, please visit <URL:http://security.FreeBSD.org/>. I. Background FreeBSD includes software from the OpenSSL Project. The OpenSSL Project is a collaborative effort to develop a robust, commercial-grade, full-featured, and Open Source toolkit implementing the Secure Sockets Layer (SSL v2/v3) and Transport Layer Security (TLS v1) protocols as well as a full-strength general purpose cryptography library. II. Problem Description A buffer overflow addressed in FreeBSD-SA-06:23.openssl has been found to be incorrectly fixed. III. Impact For applications using the SSL_get_shared_ciphers() function, the buffer overflow could allow an attacker to crash or potentially execute arbitrary code with the permissions of the user running the application. IV. Workaround No workaround is available, but only applications using the SSL_get_shared_ciphers() function are affected. V. Solution Perform one of the following: 1) Upgrade your vulnerable system to 5-STABLE, or 6-STABLE, or to the RELENG_6_2, RELENG_6_1, or RELENG_5_5 security branch dated after the correction date. 2) To patch your present system: The following patch have been verified to apply to FreeBSD 5.5, 6.1, and 6.2 systems. a) Download the relevant patch from the location below, and verify the detached PGP signature using your PGP utility. # fetch http://security.FreeBSD.org/patches/SA-07:08/openssl.patch # fetch http://security.FreeBSD.org/patches/SA-07:08/openssl.patch.asc b) Execute the following commands as root: # cd /usr/src # patch < /path/to/patch # cd /usr/src/secure/lib/libssl # make obj && make depend && make && make install VI. Correction details The following list contains the revision numbers of each file that was corrected in FreeBSD. Branch Revision Path - ------------------------------------------------------------------------- RELENG_5 src/crypto/openssl/ssl/ssl_lib.c 1.1.1.11.2.3 RELENG_5_5 src/UPDATING 1.342.2.35.2.16 src/sys/conf/newvers.sh 1.62.2.21.2.18 src/crypto/openssl/ssl/ssl_lib.c 1.1.1.11.2.1.4.2 RELENG_6 src/crypto/openssl/ssl/ssl_lib.c 1.1.1.12.2.2 RELENG_6_2 src/UPDATING 1.416.2.29.2.11 src/sys/conf/newvers.sh 1.69.2.13.2.11 src/crypto/openssl/ssl/ssl_lib.c 1.1.1.12.2.1.2.1 RELENG_6_1 src/UPDATING 1.416.2.22.2.22 src/sys/conf/newvers.sh 1.69.2.11.2.22 src/crypto/openssl/ssl/ssl_lib.c 1.1.1.12.6.2 - ------------------------------------------------------------------------- VII. References http://marc.info/?l=bugtraq&m=119091888624735 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2006-3738 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2007-5135 The latest revision of this advisory is available at http://security.FreeBSD.org/advisories/FreeBSD-SA-07:08.openssl.asc -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.7 (FreeBSD) iD8DBQFHBA+HFdaIBMps37IRAtTQAJ0bFBZt7DVJzhQkUcu7VdNS7Kj8cwCeMQaS cNFjW3j2eolZhlee83l3blo= =zwC2 -----END PGP SIGNATURE-----