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  • [SECURITY] [DSA 2363-1] tor security update

    From Moritz Muehlenhoff@1:229/2 to All on Fri Dec 16 19:40:01 2011
    From: [email protected]

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    - ------------------------------------------------------------------------- Debian Security Advisory DSA-2363-1 [email protected] http://www.debian.org/security/ Moritz Muehlenhoff December 16, 2011 http://www.debian.org/security/faq
    - -------------------------------------------------------------------------

    Package : tor
    Vulnerability : buffer overflow
    Problem type : remote
    Debian-specific: no
    CVE ID : CVE-2011-2778

    It was discovered that Tor, an online privacy tool, incorrectly computes
    buffer sizes in certain cases involving SOCKS connections. Malicious
    parties could use this to cause a heap-based buffer overflow, potentially allowing execution of arbitrary code.

    In Tor's default configuration this issue can only be triggered by
    clients that can connect to Tor's socks port, which listens only on
    localhost by default.

    In non-default configurations where Tor's SocksPort listens not only on localhost or where Tor was configured to use another socks server for all of its outgoing connections, Tor is vulnerable to a larger set of malicious parties.

    For the oldstable distribution (lenny), this problem has been fixed in
    version 0.2.1.32-1.

    For the stable distribution (squeeze), this problem has been fixed in
    version 0.2.2.35-1~squeeze+1.

    For the unstable and testing distributions, this problem has been fixed in version 0.2.2.35-1.

    For the experimental distribution, this problem has has fixed in
    version 0.2.3.10-alpha-1.

    We recommend that you upgrade your tor packages.

    Please note that the update for stable (squeeze) updates this package
    from 0.2.1.31 to 0.2.2.35, a new major release of Tor, as upstream has announced end-of-life for the 0.2.1.x tree for the near future. Please
    check your Tor runs as expected after the upgrade.


    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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