[IT-SecNots] [SECURITY] [DSA 3325-1] apache2 security update

[Stefan Fritsch <sf AT debian.org>]

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Debian Security Advisory DSA-3325-1                   security AT debian.org
https://www.debian.org/security/                           Stefan Fritsch
August 01, 2015                       https://www.debian.org/security/faq
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Package        : apache2
CVE ID         : CVE-2015-3183 CVE-2015-3185

Several vulnerabilities have been found in the Apache HTTPD server.

CVE-2015-3183

    An HTTP request smuggling attack was possible due to a bug in
    parsing of chunked requests. A malicious client could force the
    server to misinterpret the request length, allowing cache poisoning
    or credential hijacking if an intermediary proxy is in use.

CVE-2015-3185

    A design error in the "ap_some_auth_required" function renders the
    API unusuable in apache2 2.4.x. This could lead to modules using
    this API to allow access when they should otherwise not do so.
    The fix backports the new "ap_some_authn_required" API from 2.4.16.
    This issue does not affect the oldstable distribution (wheezy).


In addition, the updated package for the oldstable distribution (wheezy)
removes a limitation of the Diffie-Hellman (DH) parameters to 1024 bits.
This limitation may potentially allow an attacker with very large
computing resources, like a nation-state, to break DH key exchange by
precomputation. The updated apache2 package also allows to configure
custom DH parameters. More information is contained in the
changelog.Debian.gz file.
These improvements were already present in the stable, testing, and
unstable distributions.


For the oldstable distribution (wheezy), these problems have been fixed
in version 2.2.22-13+deb7u5.

For the stable distribution (jessie), these problems have been fixed in
version 2.4.10-10+deb8u1.

For the testing distribution (stretch), these problems will be fixed
soon.

For the unstable distribution (sid), these problems will be fixed soon.

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: https://www.debian.org/security/

Mailing list: debian-security-announce AT lists.debian.org
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