FreeBSD Security Advisories
2014-Apr-30 04:35 UTC
FreeBSD Security Advisory FreeBSD-SA-14:09.openssl
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============================================================================FreeBSD-SA-14:09.openssl
Security Advisory
The FreeBSD Project
Topic: OpenSSL use-after-free vulnerability
Category: contrib
Module: openssl
Announced: 2014-04-30
Affects: FreeBSD 10.x.
Corrected: 2014-04-30 04:03:05 UTC (stable/10, 10.0-STABLE)
2014-04-30 04:04:42 UTC (releng/10.0, 10.0-RELEASE-p2)
CVE Name: CVE-2010-5298
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
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.
OpenSSL context can be set to a mode called SSL_MODE_RELEASE_BUFFERS, which
requests the library to release the memory it holds when a read or write buffer
is no longer needed for the context.
II. Problem Description
The buffer may be released before the library have finished using it. It is
possible that a different SSL connection in the same process would use the
released buffer and write data into it.
III. Impact
An attacker may be able to inject data to a different connection that they
should not be able to.
IV. Workaround
No workaround is available, but systems that do not use OpenSSL to implement
the Secure Sockets Layer (SSL v2/v3) and Transport Layer Security (TLS v1)
protocols, or not using SSL_MODE_RELEASE_BUFFERS and use the same process
to handle multiple SSL connections, are not vulnerable.
The FreeBSD base system service daemons and utilities do not use the
SSL_MODE_RELEASE_BUFFERS mode. However, many third party software uses this
mode to reduce their memory footprint and may therefore be affected by this
issue.
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 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.
# fetch http://security.FreeBSD.org/patches/SA-14:09/openssl.patch
# fetch http://security.FreeBSD.org/patches/SA-14:09/openssl.patch.asc
# gpg --verify openssl.patch.asc
Restart all deamons using the library, or reboot the system.
3) 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
VI. Correction details
The following list contains the correction revision numbers for each
affected branch.
Branch/path Revision
- -------------------------------------------------------------------------
stable/10/ r265122
releng/10.0/ r265124
- -------------------------------------------------------------------------
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:http://svnweb.freebsd.org/base?view=revision&revision=NNNNNN>
VII. References
<URL:http://ftp.openbsd.org/pub/OpenBSD/patches/5.5/common/004_openssl.patch.sig>
<URL:https://rt.openssl.org/Ticket/Display.html?id=2167&user=guest&pass=guest>
<URL:http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2010-5298>
The latest revision of this advisory is available at
<URL:http://security.FreeBSD.org/advisories/FreeBSD-SA-14:09.openssl.asc>
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Hi! Is there something missing in this SA? 2) "b) Execute the following commands as root: # cd /usr/src # patch < /path/to/patch Recompile the operating system using buildworld and installworld as described in <URL:http://www.FreeBSD.org/handbook/makeworld.html>." Regards. On 04/30/2014 06:35 AM, FreeBSD Security Advisories wrote:> ============================================================================> FreeBSD-SA-14:09.openssl Security Advisory > The FreeBSD Project > > Topic: OpenSSL use-after-free vulnerability > > Category: contrib > Module: openssl > Announced: 2014-04-30 > Affects: FreeBSD 10.x. > Corrected: 2014-04-30 04:03:05 UTC (stable/10, 10.0-STABLE) > 2014-04-30 04:04:42 UTC (releng/10.0, 10.0-RELEASE-p2) > CVE Name: CVE-2010-5298 > > 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 > 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. > > OpenSSL context can be set to a mode called SSL_MODE_RELEASE_BUFFERS, which > requests the library to release the memory it holds when a read or write buffer > is no longer needed for the context. > > II. Problem Description > > The buffer may be released before the library have finished using it. It is > possible that a different SSL connection in the same process would use the > released buffer and write data into it. > > III. Impact > > An attacker may be able to inject data to a different connection that they > should not be able to. > > IV. Workaround > > No workaround is available, but systems that do not use OpenSSL to implement > the Secure Sockets Layer (SSL v2/v3) and Transport Layer Security (TLS v1) > protocols, or not using SSL_MODE_RELEASE_BUFFERS and use the same process > to handle multiple SSL connections, are not vulnerable. > > The FreeBSD base system service daemons and utilities do not use the > SSL_MODE_RELEASE_BUFFERS mode. However, many third party software uses this > mode to reduce their memory footprint and may therefore be affected by this > issue. > > 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 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. > > # fetch http://security.FreeBSD.org/patches/SA-14:09/openssl.patch > # fetch http://security.FreeBSD.org/patches/SA-14:09/openssl.patch.asc > # gpg --verify openssl.patch.asc > > Restart all deamons using the library, or reboot the system. > > 3) 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 > > VI. Correction details > > The following list contains the correction revision numbers for each > affected branch. > > Branch/path Revision > ------------------------------------------------------------------------- > stable/10/ r265122 > releng/10.0/ r265124 > ------------------------------------------------------------------------- > > 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:http://svnweb.freebsd.org/base?view=revision&revision=NNNNNN> > > VII. References > > <URL:http://ftp.openbsd.org/pub/OpenBSD/patches/5.5/common/004_openssl.patch.sig> > > <URL:https://rt.openssl.org/Ticket/Display.html?id=2167&user=guest&pass=guest> > > <URL:http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2010-5298> > > The latest revision of this advisory is available at > <URL:http://security.FreeBSD.org/advisories/FreeBSD-SA-14:09.openssl.asc> > _______________________________________________ > freebsd-security at freebsd.org mailing list > http://lists.freebsd.org/mailman/listinfo/freebsd-security > To unsubscribe, send any mail to "freebsd-security-unsubscribe at freebsd.org" >
-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA512 On 04/30/14 05:58, Lukasz wrote:> Hi! > > Is there something missing in this SA? > > 2) > > "b) Execute the following commands as root: > > # cd /usr/src # patch < /path/to/patch > > Recompile the operating system using buildworld and installworld > as described in > <URL:http://www.FreeBSD.org/handbook/makeworld.html>."Urgh I can't believe I made the same mistake twice. I have tweaked our template to prevent this from happening again, thanks for pointing this out. Cheers, - -- Xin LI <delphij@delphij.net> https://www.delphij.net/ FreeBSD - The Power to Serve! Live free or die -----BEGIN PGP SIGNATURE----- Version: GnuPG v2.0.22 (FreeBSD) iQIcBAEBCgAGBQJTYUlYAAoJEJW2GBstM+nsg0gP/1HT+6umvJKqFIbcBhEeVjvP l/pgeggVPtpPfigmMWSf6VjauOOm2TZOsejZXGlQdDHTkXft8wCSvCZgziLjOtrj YCZ9W3uEUcR+Co6JJNYgLOV9CSQlYcF5cBaInG+lY1/KwCE3dWjRgTCLi1LMCE8I LKXCz8Q9YGtiLGEPqsMSE2AqoZHpnkjHN3DwuShkgeGYAA4nodzKao3Mq9lN6QaO SDsfryH6Rx7SzdMJsG6UR+l7Vvp8Td1D25soM7dhuGDSS6bAOhhC7CDBJdtrtAnK dhM/sbtKOzT/2Lqo4W8tyD2+5BD6fW5PKqpASUHMHlxLHajpHxqp7VFBssdXuKF0 nGmfW4oGs4vDGwEsRd+uuDQFxo85jR+oR7FPl64qq2ioRTf417+jC+BW+IKifl1Y DvYpBF7ixcbQII1iC6fVqIBwzTPkyjMVCrGOKRh0keWa7Z4QSKNgJ1iqspIRI1Yd CFbw5pqcCDzdHwbEsXAyyJhTjEXNfa8GtY9GZnMe11Tdzc33AbDfmHodVQPrI2j6 r++pI7KrtGUwKQXV62DNPfxOkVIOHjKNS5OQ2bush0Cu7bZQD0H5O862sh2ojKum zx61rCUS03Y9hCd+VtycjMnptujEkGrLsKLcIo1jAhXSifVTNscwpz5DoYxPnIyD Y1yfp8Q9O2V2gXgw63YT =zOb8 -----END PGP SIGNATURE----- _______________________________________________ freebsd-security@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-security To unsubscribe, send any mail to "freebsd-security-unsubscribe@freebsd.org"