23 March 2015
Protect yourself against future threats.
-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2015.0687.2 Multiple OpenSSL vulnerabilities 23 March 2015 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: openssl Publisher: FreeBSD Operating System: FreeBSD Impact/Access: Denial of Service -- Remote/Unauthenticated Resolution: Patch/Upgrade CVE Names: CVE-2015-0293 CVE-2015-0292 CVE-2015-0289 CVE-2015-0288 CVE-2015-0287 CVE-2015-0286 CVE-2015-0209 CVE-2015-0204 Reference: ESB-2015.0685 ESB-2015.0680 ESB-2015.0678 Original Bulletin: ftp://ftp.freebsd.org/pub/FreeBSD/CERT/advisories/FreeBSD-SA-15:06.openssl.asc Revision History: March 23 2015: Reverted a portion of change that should not belong to the advisory and did not end up in the final OpenSSL release. The patch is also revised to include fixes for CVE-2015-0209 and CVE-2015-0288. March 20 2015: Initial Release - --------------------------BEGIN INCLUDED TEXT-------------------- - -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA512 ============================================================================= FreeBSD-SA-15:06.openssl Security Advisory The FreeBSD Project Topic: Multiple OpenSSL vulnerabilities Category: contrib Module: openssl Announced: 2015-03-19; Last revised on 2015-03-20. Affects: All supported versions of FreeBSD. Corrected: 2015-03-20 07:11:20 UTC (stable/10, 10.1-STABLE) 2015-03-20 07:12:02 UTC (releng/10.1, 10.1-RELEASE-p8) 2015-03-20 07:11:20 UTC (stable/9, 9.3-STABLE) 2015-03-20 07:12:02 UTC (releng/9.3, 9.3-RELEASE-p12) 2015-03-20 07:11:20 UTC (stable/8, 8.4-STABLE) 2015-03-20 07:12:02 UTC (releng/8.4, 8.4-RELEASE-p26) CVE Name: CVE-2015-0209, CVE-2015-0286, CVE-2015-0287, CVE-2015-0288, CVE-2015-0289, CVE-2015-0293 For general information regarding FreeBSD Security Advisories, including descriptions of the fields above, security branches, and the following sections, please visit <URL:https://security.FreeBSD.org/>. 0. Revision history v1.0 2015-03-19 Initial release. v1.1 2015-03-20 Reverted a portion of change that should not belong to the advisory and did not end up in the final OpenSSL release. The patch is also revised to include fixes for CVE-2015-0209 and CVE-2015-0288. 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. Abstract Syntax Notation One (ASN.1) is a standard and notation that describes rules and structures for representing, encoding, transmitting, and decoding data in telecommunications and computer networking, which enables representation of objects that are independent of machine-specific encoding technique. II. Problem Description A malformed elliptic curve private key file could cause a use-after-free condition in the d2i_ECPrivateKey function. [CVE-2015-0209] An attempt to compare ASN.1 boolean types will cause the ASN1_TYPE_cmp function to crash with an invalid read. [CVE-2015-0286] Reusing a structure in ASN.1 parsing may allow an attacker to cause memory corruption via an invalid write. [CVE-2015-0287] The function X509_to_X509_REQ will crash with a NULL pointer dereference if the certificate key is invalid. [CVE-2015-0288] The PKCS#7 parsing code does not handle missing outer ContentInfo correctly. [CVE-2015-0289] A malicious client can trigger an OPENSSL_assert in servers that both support SSLv2 and enable export cipher suites by sending a specially crafted SSLv2 CLIENT-MASTER-KEY message. [CVE-2015-0293] III. Impact A malformed elliptic curve private key file can cause server daemons using OpenSSL to crash, resulting in a Denial of Service. [CVE-2015-0209] A remote attacker who is able to send specifically crafted certificates may be able to crash an OpenSSL client or server. [CVE-2015-0286] An attacker who can cause invalid writes with applications that parse structures containing CHOICE or ANY DEFINED BY components and reusing the structures may be able to cause them to crash. Such reuse is believed to be rare. OpenSSL clients and servers are not affected. [CVE-2015-0287] An attacker may be able to crash applications that create a new certificate request with subject name the same as in an existing, specifically crafted certificate. This usage is rare in practice. [CVE-2015-0288] An attacker may be able to crash applications that verify PKCS#7 signatures, decrypt PKCS#7 data or otherwise parse PKCS#7 structures with specifically crafted certificates. [CVE-2015-0289] A malicious client can trigger an OPENSSL_assert in servers that both support SSLv2 and enable export cipher suites by sending a carefully crafted SSLv2 CLIENT-MASTER-KEY message, resulting in a Denial of Service. [CVE-2015-0293] Note that two issues in the original OpenSSL advisory, CVE-2015-0204 and CVE-2015-0292, were already addressed by FreeBSD-SA-15:01.openssl and FreeBSD-EN-15:02.openssl. IV. Workaround No workaround is available. V. Solution Perform one of the following: 1) Upgrade your vulnerable system to a supported FreeBSD stable or release / security branch (releng) dated after the correction date. 2) To update your vulnerable system via a binary patch: Systems running a RELEASE version of FreeBSD on the i386 or amd64 platforms can be updated via the freebsd-update(8) utility: # freebsd-update fetch # freebsd-update install 3) To update your vulnerable system via a source code patch: The following patches have been verified to apply to the applicable FreeBSD release branches. a) Download the relevant patch from the location below, and verify the detached PGP signature using your PGP utility. [FreeBSD 8.4 and FreeBSD 9.3] # fetch https://security.FreeBSD.org/patches/SA-15:06/openssl-0.9.8.patch # fetch https://security.FreeBSD.org/patches/SA-15:06/openssl-0.9.8.patch.asc # gpg --verify openssl-0.9.8.patch.asc # fetch https://security.FreeBSD.org/patches/SA-15:06/openssl-0.9.8-errata.patch # fetch https://security.FreeBSD.org/patches/SA-15:06/openssl-0.9.8-errata.patch.asc # gpg --verify openssl-0.9.8-errata.patch.asc [FreeBSD 10.1] # fetch https://security.FreeBSD.org/patches/SA-15:06/openssl-1.0.1.patch # fetch https://security.FreeBSD.org/patches/SA-15:06/openssl-1.0.1.patch.asc # gpg --verify openssl-1.0.1.patch.asc # fetch https://security.FreeBSD.org/patches/SA-15:06/openssl-1.0.1-errata.patch # fetch https://security.FreeBSD.org/patches/SA-15:06/openssl-1.0.1-errata.patch.asc # gpg --verify openssl-1.0.1-errata.patch.asc b) Apply the patch. Execute the following commands as root: # cd /usr/src # patch < /path/to/patch c) Recompile the operating system using buildworld and installworld as described in <URL:https://www.FreeBSD.org/handbook/makeworld.html>. Restart all deamons using the library, or reboot the system. VI. Correction details The following list contains the correction revision numbers for each affected branch. Branch/path Revision - - ------------------------------------------------------------------------- stable/8/ r280274 releng/8.4/ r280275 stable/9/ r280274 releng/9.3/ r280275 stable/10/ r280274 releng/10.1/ r280275 - - ------------------------------------------------------------------------- To see which files were modified by a particular revision, run the following command, replacing NNNNNN with the revision number, on a machine with Subversion installed: # svn diff -cNNNNNN --summarize svn://svn.freebsd.org/base Or visit the following URL, replacing NNNNNN with the revision number: <URL:https://svnweb.freebsd.org/base?view=revision&revision=NNNNNN> VII. References <URL:https://www.openssl.org/news/secadv_20150319.txt> <URL:https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2015-0209> <URL:https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2015-0286> <URL:https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2015-0287> <URL:https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2015-0288> <URL:https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2015-0289> <URL:https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2015-0293> The latest revision of this advisory is available at <URL:https://security.FreeBSD.org/advisories/FreeBSD-SA-15:06.openssl.asc> - -----BEGIN PGP SIGNATURE----- Version: GnuPG v2.1.2 (FreeBSD) iQIcBAEBCgAGBQJVC8m8AAoJEO1n7NZdz2rn/lQP/1ZrUSnxaoaZxQbLrBZlg7Jr dAgjo4JTSPwyJM3gQY+WD1WPChxIJvbndR/NQux9grrn6N06kD+q0DUHOXi6MAL0 TqMEGxAqVlIUVdn18xZJaIwEzcx5HJKQz2UOMk3UGjy3WSh93p25oewF/cIcaryN FKAmpXmmPm77Qv5Vr1st8OyjnP7XiMmerSEWVGqFLsJPye5lvHcPOZrzQkRQRQJf 1b896UaOezw4v8C2HJvJMrQLN4l/ahCV6NsuQnN1/yzo8cS75OxMsooo8VgA8k0G ADuNFb1oZIygoin6ZOxlSHeeh+A6mdhitU4hNNy2rBNTC9IwijCg/dx/x1rutAxb 3MHUcCmF0sNewTkDwdzSvVCR4pYAAPI3yG0gUlXMTepQpH6Ozjf77OPW5KQPVGzf ijqOS32hprqVklDu2yREUv1AY0srboES5b9XQyfkFCFyNF8VX3OaDL8jHdfQezSx njF8UVUydmC7szDCW+MmQoNo4NaPCLd2m3l25RRD8SAdR9jB8WIox59E1k2O+LP/ rgO6wial36CUiTc5SdbCzVom9K/KhKXeBWAlCnK9R9DCNaUaiBIvTBngtGdfjxxi bJxoSqXSnfVwhGE565cwtODR/qMfRxY6Z8g4JEkSQN5SmzezmyLCdmXCpktHkC21 XQG0M1dIh8m3m67rEyE6 =C2Zp - -----END PGP SIGNATURE----- - --------------------------END INCLUDED TEXT-------------------- You have received this e-mail bulletin as a result of your organisation's registration with AusCERT. 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