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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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