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Gentoo Linux Security Advisory 201503-11

Gentoo Linux Security Advisory 201503-11
Posted Mar 20, 2015
Authored by Gentoo | Site security.gentoo.org

Gentoo Linux Security Advisory 201503-11 - Multiple vulnerabilities have been found in OpenSSL that can result in either Denial of Service or information disclosure. Versions less than 1.0.1l-r1 are affected.

tags | advisory, denial of service, vulnerability, info disclosure
systems | linux, gentoo
advisories | CVE-2015-0204, CVE-2015-0207, CVE-2015-0208, CVE-2015-0209, CVE-2015-0285, CVE-2015-0287, CVE-2015-0288, CVE-2015-0289, CVE-2015-0290, CVE-2015-0291, CVE-2015-0292, CVE-2015-0293, CVE-2015-1787
SHA-256 | 33a1b6ad39a1a0e33e4f539a9bff855b2186411aa683ae4907abf7f7052665ad

Gentoo Linux Security Advisory 201503-11

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Gentoo Linux Security Advisory GLSA 201503-11
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https://security.gentoo.org/
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Severity: Normal
Title: OpenSSL: Multiple vulnerabilities
Date: March 19, 2015
Bugs: #543552
ID: 201503-11

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Synopsis
========

Multiple vulnerabilities have been found in OpenSSL that can result in
either Denial of Service or information disclosure.

Background
==========

OpenSSL is an Open Source toolkit implementing the Secure Sockets Layer
(SSL v2/v3) and Transport Layer Security (TLS v1) as well as a general
purpose cryptography library.

Affected packages
=================

-------------------------------------------------------------------
Package / Vulnerable / Unaffected
-------------------------------------------------------------------
1 dev-libs/openssl < 1.0.1l-r1 *>= 0.9.8z_p5-r1
>= 1.0.1l-r1

Description
===========

Multiple vulnerabilities have been found in OpenSSL. Please review the
CVE identifiers and the upstream advisory referenced below for details:

* RSA silently downgrades to EXPORT_RSA [Client] (Reclassified)
(CVE-2015-0204)
* Segmentation fault in ASN1_TYPE_cmp (CVE-2015-0286)
* ASN.1 structure reuse memory corruption (CVE-2015-0287)
* X509_to_X509_REQ NULL pointer deref (CVE-2015-0288)
* PKCS7 NULL pointer dereferences (CVE-2015-0289)
* Base64 decode (CVE-2015-0292)
* DoS via reachable assert in SSLv2 servers (CVE-2015-0293)
* Use After Free following d2i_ECPrivatekey error (CVE-2015-0209)

The following issues affect OpenSSL 1.0.2 only which is not part of the
supported Gentoo stable tree:

* OpenSSL 1.0.2 ClientHello sigalgs DoS (CVE-2015-0291)
* Multiblock corrupted pointer (CVE-2015-0290)
* Segmentation fault in DTLSv1_listen (CVE-2015-0207)
* Segmentation fault for invalid PSS parameters (CVE-2015-0208)
* Empty CKE with client auth and DHE (CVE-2015-1787)
* Handshake with unseeded PRNG (CVE-2015-0285)

Impact
======

A remote attacker can utilize multiple vectors to cause Denial of
Service or Information Disclosure.

Workaround
==========

There is no known workaround at this time.

Resolution
==========

All OpenSSL 1.0.1 users should upgrade to the latest version:

# emerge --sync
# emerge --ask --oneshot --verbose ">=dev-libs/openssl-1.0.1l-r1"

All OpenSSL 0.9.8 users should upgrade to the latest version:

# emerge --sync
# emerge --ask --oneshot --verbose ">=dev-libs/openssl-0.9.8z_p5-r1"

Packages which depend on the OpenSSL library need to be restarted for
the upgrade to take effect. Some packages may need to be recompiled.
Tools such as revdep-rebuild may assist in identifying some of these
packages.

References
==========

[ 1 ] CVE-2015-0204
http://nvd.nist.gov/nvd.cfm?cvename=CVE-2015-0204
[ 2 ] CVE-2015-0207
http://nvd.nist.gov/nvd.cfm?cvename=CVE-2015-0207
[ 3 ] CVE-2015-0208
http://nvd.nist.gov/nvd.cfm?cvename=CVE-2015-0208
[ 4 ] CVE-2015-0209
http://nvd.nist.gov/nvd.cfm?cvename=CVE-2015-0209
[ 5 ] CVE-2015-0285
http://nvd.nist.gov/nvd.cfm?cvename=CVE-2015-0285
[ 6 ] CVE-2015-0287
http://nvd.nist.gov/nvd.cfm?cvename=CVE-2015-0287
[ 7 ] CVE-2015-0288
http://nvd.nist.gov/nvd.cfm?cvename=CVE-2015-0288
[ 8 ] CVE-2015-0289
http://nvd.nist.gov/nvd.cfm?cvename=CVE-2015-0289
[ 9 ] CVE-2015-0290
http://nvd.nist.gov/nvd.cfm?cvename=CVE-2015-0290
[ 10 ] CVE-2015-0291
http://nvd.nist.gov/nvd.cfm?cvename=CVE-2015-0291
[ 11 ] CVE-2015-0292
http://nvd.nist.gov/nvd.cfm?cvename=CVE-2015-0292
[ 12 ] CVE-2015-0293
http://nvd.nist.gov/nvd.cfm?cvename=CVE-2015-0293
[ 13 ] CVE-2015-1787
http://nvd.nist.gov/nvd.cfm?cvename=CVE-2015-1787
[ 14 ] OpenSSL Security Advisory [19 Mar 2015]
http://openssl.org/news/secadv_20150319.txt

Availability
============

This GLSA and any updates to it are available for viewing at
the Gentoo Security Website:

https://security.gentoo.org/glsa/201503-11

Concerns?
=========

Security is a primary focus of Gentoo Linux and ensuring the
confidentiality and security of our users' machines is of utmost
importance to us. Any security concerns should be addressed to
security@gentoo.org or alternatively, you may file a bug at
https://bugs.gentoo.org.

License
=======

Copyright 2015 Gentoo Foundation, Inc; referenced text
belongs to its owner(s).

The contents of this document are licensed under the
Creative Commons - Attribution / Share Alike license.

http://creativecommons.org/licenses/by-sa/2.5

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