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  • [SECURITY] [DSA 3325-2] apache2 regression update

    From Stefan Fritsch@1:229/2 to All on Tue Aug 18 13:50:02 2015
    From: [email protected]

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    - ------------------------------------------------------------------------- Debian Security Advisory DSA-3325-2 [email protected] https://www.debian.org/security/ Stefan Fritsch August 18, 2015 https://www.debian.org/security/faq
    - -------------------------------------------------------------------------

    Package : apache2
    CVE ID : CVE-2015-3183 CVE-2015-3185
    Debian Bug : 794383

    The security update from DSA-3325-1 caused a regression for the
    oldstable distribution (wheezy). In some configurations, apache2 would
    fail to start with a spurious error message about the certificate chain.
    This update fixes this problem. For reference, the text of the original advisory follows:


    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), this problem has been fixed
    in version 2.2.22-13+deb7u6.

    The other distributions were not affected by the regression.

    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: [email protected]
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