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freebsd_advisoryFreeBSD OrgFREEBSD_ADVISORY:FREEBSD-SA-09:08.OPENSSL
HistoryApr 22, 2009 - 12:00 a.m.

FreeBSD-SA-09:08.openssl

2009-04-2200:00:00
FreeBSD Org
www.freebsd.org

CVSS2

5

Attack Vector

NETWORK

Attack Complexity

LOW

Authentication

NONE

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

PARTIAL

AV:N/AC:L/Au:N/C:N/I:N/A:P

EPSS

0.271

Percentile

96.8%

-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 ============================================================================= FreeBSD-SA-09:08.openssl Security Advisory The FreeBSD Project Topic: Remotely exploitable crash in OpenSSL Category: contrib Module: openssl Announced: 2009-04-22 Affects: All supported versions of FreeBSD. Corrected: 2009-04-22 14:07:14 UTC (RELENG_7, 7.2-PRERELEASE) 2009-04-22 14:07:14 UTC (RELENG_7_2, 7.2-RC2) 2009-04-22 14:07:14 UTC (RELENG_7_1, 7.1-RELEASE-p5) 2009-04-22 14:07:14 UTC (RELENG_7_0, 7.0-RELEASE-p12) 2009-04-22 14:07:14 UTC (RELENG_6, 6.4-STABLE) 2009-04-22 14:07:14 UTC (RELENG_6_4, 6.4-RELEASE-p4) 2009-04-22 14:07:14 UTC (RELENG_6_3, 6.3-RELEASE-p10) CVE Name: CVE-2009-0590 For general information regarding FreeBSD Security Advisories, including descriptions of the fields above, security branches, and the following sections, please visit . I. Background FreeBSD includes software from the OpenSSL Project. The OpenSSL Project is a collaborative effort to develop a robust, commercial-grade, full-featured 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. The function ASN1_STRING_print_ex is often used to print the contents of an SSL certificate. II. Problem Description The function ASN1_STRING_print_ex does not properly validate the lengths of BMPString or UniversalString objects before attempting to print them. III. Impact An application which attempts to print a BMPString or UniversalString which has an invalid length will crash as a result of OpenSSL accessing invalid memory locations. This could be used by an attacker to crash a remote application. IV. Workaround No workaround is available, but applications which do not use the ASN1_STRING_print_ex function (either directly or indirectly) are not affected. V. Solution Perform one of the following: 1) Upgrade your vulnerable system to 6-STABLE, or 7-STABLE, or to the RELENG_7_2, RELENG_7_1, RELENG_7_0, RELENG_6_4, or RELENG_6_3 security branch dated after the correction date. 2) To patch your present system: The following patches have been verified to apply to FreeBSD 6.3, 6.4, 7.0, 7.1, and 7.2 systems. a) Download the relevant patch from the location below, and verify the detached PGP signature using your PGP utility. [FreeBSD 7.x] # fetch http://security.FreeBSD.org/patches/SA-09:08/openssl.patch # fetch http://security.FreeBSD.org/patches/SA-09:08/openssl.patch.asc [FreeBSD 6.x] # fetch http://security.FreeBSD.org/patches/SA-09:08/openssl6.patch # fetch http://security.FreeBSD.org/patches/SA-09:08/openssl6.patch.asc b) Execute the following commands as root: # cd /usr/src # patch < /path/to/patch # cd /usr/src/secure/lib/libcrypto # make obj && make depend && make includes && make && make install NOTE: On the amd64 platform, the above procedure will not update the lib32 (i386 compatibility) libraries. On amd64 systems where the i386 compatibility libraries are used, the operating system should instead be recompiled as described in VI. Correction details The following list contains the revision numbers of each file that was corrected in FreeBSD. CVS: Branch Revision Path - ------------------------------------------------------------------------- RELENG_6 src/crypto/openssl/crypto/asn1/asn1_err.c 1.1.1.4.12.1 src/crypto/openssl/crypto/asn1/tasn_dec.c 1.1.1.2.10.2 src/crypto/openssl/crypto/asn1/asn1.h 1.1.1.7.10.1 RELENG_6_4 src/UPDATING 1.416.2.40.2.8 src/sys/conf/newvers.sh 1.69.2.18.2.10 src/crypto/openssl/crypto/asn1/asn1_err.c 1.1.1.4.24.1 src/crypto/openssl/crypto/asn1/tasn_dec.c 1.1.1.2.10.1.6.1 src/crypto/openssl/crypto/asn1/asn1.h 1.1.1.7.22.1 RELENG_6_3 src/UPDATING 1.416.2.37.2.15 src/sys/conf/newvers.sh 1.69.2.15.2.14 src/crypto/openssl/crypto/asn1/asn1_err.c 1.1.1.4.22.1 src/crypto/openssl/crypto/asn1/tasn_dec.c 1.1.1.2.10.1.4.1 src/crypto/openssl/crypto/asn1/asn1.h 1.1.1.7.20.1 RELENG_7 src/crypto/openssl/crypto/asn1/asn1_err.c 1.1.1.6.2.1 src/crypto/openssl/crypto/asn1/tasn_dec.c 1.1.1.5.2.1 src/crypto/openssl/crypto/asn1/asn1.h 1.2.2.1 RELENG_7_2 src/UPDATING 1.507.2.23.2.2 src/crypto/openssl/crypto/asn1/asn1_err.c 1.1.1.6.8.1 src/crypto/openssl/crypto/asn1/tasn_dec.c 1.1.1.5.8.1 src/crypto/openssl/crypto/asn1/asn1.h 1.2.8.1 RELENG_7_1 src/UPDATING 1.507.2.13.2.8 src/sys/conf/newvers.sh 1.72.2.9.2.9 src/crypto/openssl/crypto/asn1/asn1_err.c 1.1.1.6.6.1 src/crypto/openssl/crypto/asn1/tasn_dec.c 1.1.1.5.6.1 src/crypto/openssl/crypto/asn1/asn1.h 1.2.6.1 RELENG_7_0 src/UPDATING 1.507.2.3.2.16 src/sys/conf/newvers.sh 1.72.2.5.2.16 src/crypto/openssl/crypto/asn1/asn1_err.c 1.1.1.6.4.1 src/crypto/openssl/crypto/asn1/tasn_dec.c 1.1.1.5.4.1 src/crypto/openssl/crypto/asn1/asn1.h 1.2.4.1 - ------------------------------------------------------------------------- Subversion: Branch/path Revision - ------------------------------------------------------------------------- stable/6/ r191381 releng/6.4/ r191381 releng/6.3/ r191381 stable/7/ r191381 releng/7.2/ r191381 releng/7.1/ r191381 releng/7.0/ r191381 - ------------------------------------------------------------------------- VII. References http://openssl.org/news/secadv_20090325.txt [Note that two of the issues mentioned in the OpenSSL advisory do not affect FreeBSD.] https://vulners.com/cve/CVE-2009-0590 The latest revision of this advisory is available at http://security.FreeBSD.org/advisories/FreeBSD-SA-09:08.openssl.asc -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.9 (FreeBSD) iEYEARECAAYFAknvJegACgkQFdaIBMps37LB4gCffpTTOSdqyLK6ravrv6h8LqWE MDcAn2SIjNmRL8Oktk0l9hLz0mhtcxWP =Q7Zz -----END PGP SIGNATURE-----

CVSS2

5

Attack Vector

NETWORK

Attack Complexity

LOW

Authentication

NONE

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

PARTIAL

AV:N/AC:L/Au:N/C:N/I:N/A:P

EPSS

0.271

Percentile

96.8%