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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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