FreeBSD Security Advisory FreeBSD-SA-17:11.openssl
Franco Fichtner
franco at lastsummer.de
Wed Nov 29 07:38:05 UTC 2017
Hi,
releng/11.1 is missing the bump to p5 patch level in sys/conf/newvers.sh
Cheers,
Franco
> On 29. Nov 2017, at 7:15 AM, FreeBSD Security Advisories <security-advisories at freebsd.org> wrote:
>
> Signed PGP part
> =============================================================================
> FreeBSD-SA-17:11.openssl Security Advisory
> The FreeBSD Project
>
> Topic: OpenSSL multiple vulnerabilities
>
> Category: contrib
> Module: openssl
> Announced: 2017-11-29
> Affects: All supported versions of FreeBSD.
> Corrected: 2017-11-02 18:30:41 UTC (stable/11, 11.1-STABLE)
> 2017-11-29 05:59:12 UTC (releng/11.1, 11.1-RELEASE-p5)
> 2017-11-29 05:59:12 UTC (releng/11.0, 11.0-RELEASE-p16)
> 2017-11-29 05:35:28 UTC (stable/10, 10.4-STABLE)
> 2017-11-29 05:59:50 UTC (releng/10.4, 10.4-RELEASE-p4)
> 2017-11-29 05:59:50 UTC (releng/10.3, 10.3-RELEASE-p25)
> CVE Name: CVE-2017-3735, CVE-2017-3736
>
> 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 for the Transport Layer Security (TLS) and Secure Sockets
> Layer (SSL) protocols. It is also a full-strength general purpose
> cryptography library.
>
> II. Problem Description
>
> If an X.509 certificate has a malformed IPAddressFamily extension, OpenSSL
> could do a one-byte buffer overread. [CVE-2017-3735]
>
> There is a carry propagating bug in the x86_64 Montgomery squaring procedure.
> This only affects processors that support the BMI1, BMI2 and ADX extensions
> like Intel Broadwell (5th generation) and later or AMD Ryzen. [CVE-2017-3736]
> This bug only affects FreeBSD 11.x.
>
> III. Impact
>
> Application using OpenSSL may display erroneous certificate in text format.
> [CVE-2017-3735]
>
> Mishandling of carry propagation will produce incorrect output, and make it
> easier for a remote attacker to obtain sensitive private-key information.
> No EC algorithms are affected, analysis suggests that attacks against RSA
> and DSA as a result of this defect would be very difficult to perform and
> are not believed likely.
>
> Attacks against DH are considered just feasible (although very difficult)
> because most of the work necessary to deduce information about a private
> key may be performed offline. The amount of resources required for such
> an attack would be very significant and likely only accessible to a limited
> number of attackers. An attacker would additionally need online access to
> an unpatched system using the target private key in a scenario with
> persistent DH parameters and a private key that is shared between multiple
> clients. [CVE-2017-3736]
>
> 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.
>
> Restart all daemons that use the library, or reboot the system.
>
> 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
>
> Restart all daemons that use the library, or reboot the system.
>
> 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 10.3]
> # fetch https://security.FreeBSD.org/patches/SA-17:11/openssl-10.patch
> # fetch https://security.FreeBSD.org/patches/SA-17:11/openssl-10.patch.asc
> # gpg --verify openssl-10.patch.asc
>
> [FreeBSD 11.x]
> # fetch https://security.FreeBSD.org/patches/SA-17:11/openssl.patch
> # fetch https://security.FreeBSD.org/patches/SA-17:11/openssl.patch.asc
> # gpg --verify openssl.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 daemons that use 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/10/ r326357
> releng/10.3/ r326359
> releng/10.4/ r326359
> stable/11/ r325337
> releng/11.0/ r326358
> releng/11.1/ r326358
> -------------------------------------------------------------------------
>
> 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://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-3735>
>
> <URL:https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-3736>
>
> <URL:https://www.openssl.org/news/secadv/20171102.txt>
>
> The latest revision of this advisory is available at
> <URL:https://security.FreeBSD.org/advisories/FreeBSD-SA-17:11.openssl.asc>
>
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