-----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 Affects: All supported versions of FreeBSD. Corrected: 2015-03-19 17:40:43 UTC (stable/10, 10.1-STABLE) 2015-03-19 17:42:38 UTC (releng/10.1, 10.1-RELEASE-p7) 2015-03-19 17:40:43 UTC (stable/9, 9.3-STABLE) 2015-03-19 17:42:38 UTC (releng/9.3, 9.3-RELEASE-p11) 2015-03-19 17:40:43 UTC (stable/8, 8.4-STABLE) 2015-03-19 17:42:38 UTC (releng/8.4, 8.4-RELEASE-p25) 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/>. 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 [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 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/ r280266 releng/8.4/ r280268 stable/9/ r280266 releng/9.3/ r280268 stable/10/ r280266 releng/10.1/ r280268 - ------------------------------------------------------------------------- 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) iQIcBAEBCgAGBQJVCwr1AAoJEO1n7NZdz2rnayEP/0w3Pba5k/1G0mJ1T9APNAns hhXm0YuR/rNJ1XBooWEOctrijlsVChcIt8KvJCU9apOZWjDvm/nvaQ077GCi5RSp jhQBs8MLVfXzwMbJ0/uBpp6ChF8uafk5O+gr8ulb2jG6VIaLkGOWPYv61aRYSGxy R7+6FxD8M0lLbGOQGETy1HxKzeWztA2p0ILORNAsi+bF8GSJpxGhSxqDDi4+ic/C 3oEw0zT/E6DhxJovOPebKq0eGcRbv7ETqDmtNQdqbOddV+0FY1E+nHtrAo6B/Kln rL+meBJHmLeEREROFk4OvCynuROUJGmXJGKwjN3uOVM05qcEZS4NkVhFNrxt6S5H t3wQ02SesbA3pbmce5OuXmlJgdL57DVlMb5sQjkqPeoJ6pn6Rz7VLSgLNfXDUSxs x/Lgx0+qLQUubMud7zT97UIvZmDqFTWXfJu5S/0Qt8BPFunmoNJttJ5Cr+brzEtu 5RLjcvkC1giVCpSXS96QbeT67uqSkMZa8gtII8bA77HBGA0Ky8AOwTAXbCiUovuH sLwsI8KUC3lsKUh7eyLsSm2+wRHn0e6dZ1PE0JRazCnCRboTvMWK2d4R7ANdrwsq CgtCWLRz6vbB9J4XTNupcEoZGhIA4RuOBqx43eQmaRw1HoV3vn85QP94oL5jzXBd UQg3YfrXHDlxCsqEzN7o =wi0T -----END PGP SIGNATURE-----