• [SECURITY] [DSA 2368-1] lighttpd security update

    From Nico Golde@1:229/2 to All on Wed Dec 21 01:50:03 2011
    From: [email protected]

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    - --------------------------------------------------------------------------- Debian Security Advisory DSA-2368-1 [email protected] http://www.debian.org/security/ Nico Golde
    Dec 20th, 2011 http://www.debian.org/security/faq
    - ---------------------------------------------------------------------------

    Package : lighttpd
    Vulnerability : multiple
    Problem type : remote
    Debian-specific: no
    Debian bug : 652726
    CVE IDs : CVE-2011-4362 CVE-2011-3389

    Several vulnerabilities have been discovered in lighttpd, a small and fast webserver with minimal memory footprint.

    CVE-2011-4362

    Xi Wang discovered that the base64 decoding routine which is used to
    decode user input during an HTTP authentication, suffers of a signedness
    issue when processing user input. As a result it is possible to force
    lighttpd to perform an out-of-bounds read which results in Denial of
    Service conditions.

    CVE-2011-3389

    When using CBC ciphers on an SSL enabled virtual host to communicate with
    certain client, a so called "BEAST" attack allows man-in-the-middle
    attackers to obtain plaintext HTTP traffic via a blockwise
    chosen-boundary attack (BCBA) on an HTTPS session. Technically this is
    no lighttpd vulnerability. However, lighttpd offers a workaround to
    mitigate this problem by providing a possibility to disable CBC ciphers.

    This updates includes this option by default. System administrators
    are advised to read the NEWS file of this update (as this may break older
    clients).


    For the oldstable distribution (lenny), this problem has been fixed in
    version 1.4.19+lenny3.

    For the stable distribution (squeeze), this problem has been fixed in
    version 1.4.28-2+squeeze1.

    For the testing distribution (squeeze), this problem will be fixed soon.

    For the unstable distribution (sid), this problem has been fixed in
    version 1.4.30-1.


    We recommend that you upgrade your lighttpd 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: [email protected]

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