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  • [SECURITY] [DSA 2197-1] quagga security update

    From Florian Weimer@1:229/2 to All on Mon Mar 21 20:20:02 2011
    From: [email protected]

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    - ------------------------------------------------------------------------- Debian Security Advisory DSA-2197-1 [email protected] http://www.debian.org/security/ Florian Weimer
    March 21, 2011 http://www.debian.org/security/faq
    - -------------------------------------------------------------------------

    Package : quagga
    Vulnerability : denial of service
    Problem type : remote
    Debian-specific: no
    CVE ID : CVE-2010-1674 CVE-2010-1675

    It has been discovered that the Quagga routing daemon contains two denial-of-service vulnerabilities in its BGP implementation:

    CVE-2010-1674
    A crafted Extended Communities attribute triggers a null
    pointer dereference which causes the BGP daemon to crash.
    The crafted attributes are not propagated by the Internet
    core, so only explicitly configured direct peers are able
    to exploit this vulnerability in typical configurations.

    CVE-2010-1675
    The BGP daemon resets BGP sessions when it encounters
    malformed AS_PATHLIMIT attributes, introducing a distributed
    BGP session reset vulnerability which disrupts packet
    forwarding. Such malformed attributes are propagated by the
    Internet core, and exploitation of this vulnerability is not
    restricted to directly configured BGP peers.

    This security update removes AS_PATHLIMIT processing from the BGP implementation, preserving the configuration statements for backwards compatibility. (Standardization of this BGP extension was abandoned
    long ago.)

    For the oldstable distribution (lenny), these problems have been fixed
    in version 0.99.10-1lenny5.

    For the stable distribution (squeeze), these problems have been fixed
    in version 0.99.17-2+squeeze2.

    For the testing distribution (wheezy) and the unstable distribution
    (sid), these problems will fixed soon.

    We recommend that you upgrade your quagga 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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