Exploit the possiblities

FreeBSD Security Advisory - OpenSSL Issues

FreeBSD Security Advisory - OpenSSL Issues
Posted Dec 6, 2015
Site security.freebsd.org

FreeBSD Security Advisory - OpenSSL has had multiple vulnerabilities addressed. The signature verification routines will crash with a NULL pointer dereference if presented with an ASN.1 signature using the RSA PSS algorithm and absent mask generation function parameter. When presented with a malformed X509_ATTRIBUTE structure, OpenSSL will leak memory. If PSK identity hints are received by a multi-threaded client then the values are incorrectly updated in the parent SSL_CTX structure.

tags | advisory
systems | freebsd
advisories | CVE-2015-3194, CVE-2015-3195, CVE-2015-3196
MD5 | 0ced99acb2a23bfd013e2e6894d43ce7

FreeBSD Security Advisory - OpenSSL Issues

Change Mirror Download
-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA512

=============================================================================
FreeBSD-SA-15:26.openssl Security Advisory
The FreeBSD Project

Topic: Multiple OpenSSL vulnerabilities

Category: contrib
Module: openssl
Announced: 2015-12-05
Affects: All supported versions of FreeBSD.
Corrected: 2015-12-03 21:18:48 UTC (stable/10, 10.2-STABLE)
2015-12-05 09:53:58 UTC (releng/10.2, 10.2-RELEASE-p8)
2015-12-05 09:53:58 UTC (releng/10.1, 10.1-RELEASE-p25)
2015-12-03 21:24:40 UTC (stable/9, 9.3-STABLE)
2015-12-05 09:53:58 UTC (releng/9.3, 9.3-RELEASE-p31)
CVE Name: CVE-2015-3194, CVE-2015-3195, CVE-2015-3196

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.

II. Problem Description

The signature verification routines will crash with a NULL pointer dereference
if presented with an ASN.1 signature using the RSA PSS algorithm and absent
mask generation function parameter. [CVE-2015-3194]

When presented with a malformed X509_ATTRIBUTE structure, OpenSSL will leak
memory. [CVE-2015-3195]

If PSK identity hints are received by a multi-threaded client then the values
are incorrectly updated in the parent SSL_CTX structure. [CVE-2015-3196]

III. Impact

A remote attacker who can present a specifically crafted certificate may
cause a OpenSSL client or server application that performs certificate
signature verification to crash with a NULL pointer dereference, resulting
in a Denial of Service. [CVE-2015-3194] This affects FreeBSD 10.x only.

An attacker who is able to feed specifically crafted PKCS#7/CMS data to an
OpenSSL application can cause memory leak which may eventually result in a
Denial of Service. [CVE-2015-3195]

A remote attacker who can send PSK identity hints to a multi-thread client
may trigger a double fault of hint data, which may lead to crash the client
application. [CVE-2015-3196]. This affects FreeBSD 10.1 only.

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.

Reboot is optional but recommended.

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

Reboot is optional but recommended.

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 9.3]
# fetch https://security.FreeBSD.org/patches/SA-15:26/openssl-9.3.patch
# fetch https://security.FreeBSD.org/patches/SA-15:26/openssl-9.3.patch.asc
# gpg --verify openssl-9.3.patch.asc

[FreeBSD 10.1]
# fetch https://security.FreeBSD.org/patches/SA-15:26/openssl-10.1.patch
# fetch https://security.FreeBSD.org/patches/SA-15:26/openssl-10.1.patch.asc
# gpg --verify openssl-10.1.patch.asc

[FreeBSD 10.2]
# fetch https://security.FreeBSD.org/patches/SA-15:26/openssl-10.2.patch
# fetch https://security.FreeBSD.org/patches/SA-15:26/openssl-10.2.patch.asc
# gpg --verify openssl-10.2.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/9/ r291722
releng/9.3/ r291854
stable/10/ r291721
releng/10.1/ r291854
releng/10.2/ r291854
- -------------------------------------------------------------------------

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/20151203.txt>

<URL:https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2015-3194>

<URL:https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2015-3195>

<URL:https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2015-3196>

The latest revision of this advisory is available at
<URL:https://security.FreeBSD.org/advisories/FreeBSD-SA-15:26.openssl.asc>
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v2.1.8 (FreeBSD)
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=p0x+
-----END PGP SIGNATURE-----

Comments

RSS Feed Subscribe to this comment feed

No comments yet, be the first!

Login or Register to post a comment

Want To Donate?


Bitcoin: 18PFeCVLwpmaBuQqd5xAYZ8bZdvbyEWMmU

File Archive:

February 2018

  • Su
  • Mo
  • Tu
  • We
  • Th
  • Fr
  • Sa
  • 1
    Feb 1st
    15 Files
  • 2
    Feb 2nd
    15 Files
  • 3
    Feb 3rd
    15 Files
  • 4
    Feb 4th
    13 Files
  • 5
    Feb 5th
    16 Files
  • 6
    Feb 6th
    15 Files
  • 7
    Feb 7th
    15 Files
  • 8
    Feb 8th
    15 Files
  • 9
    Feb 9th
    18 Files
  • 10
    Feb 10th
    8 Files
  • 11
    Feb 11th
    8 Files
  • 12
    Feb 12th
    17 Files
  • 13
    Feb 13th
    15 Files
  • 14
    Feb 14th
    15 Files
  • 15
    Feb 15th
    17 Files
  • 16
    Feb 16th
    18 Files
  • 17
    Feb 17th
    37 Files
  • 18
    Feb 18th
    2 Files
  • 19
    Feb 19th
    16 Files
  • 20
    Feb 20th
    6 Files
  • 21
    Feb 21st
    0 Files
  • 22
    Feb 22nd
    0 Files
  • 23
    Feb 23rd
    0 Files
  • 24
    Feb 24th
    0 Files
  • 25
    Feb 25th
    0 Files
  • 26
    Feb 26th
    0 Files
  • 27
    Feb 27th
    0 Files
  • 28
    Feb 28th
    0 Files

Top Authors In Last 30 Days

File Tags

Systems

packet storm

© 2018 Packet Storm. All rights reserved.

Services
Security Services
Hosting By
Rokasec
close