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[SECURITY] [DSA 2579-1] apache2 security update
From: Stefan Fritsch <sf () debian org>
Date: Fri, 30 Nov 2012 13:22:52 +0000

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Debian Security Advisory DSA-2579-1                   security () debian org
http://www.debian.org/security/                            Stefan Fritsch
November 30, 2012                      http://www.debian.org/security/faq
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Package        : apache2
Vulnerability  : Multiple issues
Problem type   : remote
Debian-specific: no
CVE ID         : CVE-2012-4557 CVE-2012-4929
Debian Bug     : 689936

A vulnerability has been found in the Apache HTTPD Server:

CVE-2012-4557

        A flaw was found when mod_proxy_ajp connects to a backend
        server that takes too long to respond. Given a specific
        configuration, a remote attacker could send certain requests,
        putting a backend server into an error state until the retry
        timeout expired. This could lead to a temporary denial of
        service.

In addition, this update also adds a server side mitigation for the
following issue:

CVE-2012-4929

        If using SSL/TLS data compression with HTTPS in an connection
        to a web browser, man-in-the-middle attackers may obtain
        plaintext HTTP headers. This issue is known as the "CRIME"
        attack. This update of apache2 disables SSL compression by
        default. A new SSLCompression directive has been backported
        that may be used to re-enable SSL data compression in
        environments where the "CRIME" attack is not an issue.
        For more information, please refer to:
        http://httpd.apache.org/docs/2.4/mod/mod_ssl.html#sslcompression

For the stable distribution (squeeze), these problems have been fixed in
version 2.2.16-6+squeeze10.

For the testing distribution (wheezy), these problems have been fixed in
version 2.2.22-12.

For the unstable distribution (sid), these problems have been fixed in
version 2.2.22-12.

We recommend that you upgrade your apache2 packages.

Further information about Debian Security Advisories, how to apply
these updates to your system and frequently asked questions can be
found at: http://www.debian.org/security/

Mailing list: debian-security-announce () lists debian org
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