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  • [SECURITY] [DSA 2390-1] openssl security update

    From Florian Weimer@1:229/2 to All on Sun Jan 15 21:30:01 2012
    From: [email protected]

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    - ------------------------------------------------------------------------- Debian Security Advisory DSA-2390-1 [email protected] http://www.debian.org/security/ Florian Weimer January 15, 2012 http://www.debian.org/security/faq
    - -------------------------------------------------------------------------

    Package : openssl
    Vulnerability : several
    Problem type : remote
    Debian-specific: no
    CVE ID : CVE-2011-4108 CVE-2011-4109 CVE-2011-4354
    CVE-2011-4576 CVE-2011-4619

    Several vulnerabilities were discovered in OpenSSL, an implementation
    of TLS and related protocols. The Common Vulnerabilities and
    Exposures project identifies the following vulnerabilities:

    CVE-2011-4108
    The DTLS implementation performs a MAC check only if certain
    padding is valid, which makes it easier for remote attackers
    to recover plaintext via a padding oracle attack.

    CVE-2011-4109
    A double free vulnerability when X509_V_FLAG_POLICY_CHECK is
    enabled, allows remote attackers to cause applications crashes
    and potentially allow execution of arbitrary code by
    triggering failure of a policy check.

    CVE-2011-4354
    On 32-bit systems, the operations on NIST elliptic curves
    P-256 and P-384 are not correctly implemented, potentially
    leaking the private ECC key of a TLS server. (Regular
    RSA-based keys are not affected by this vulnerability.)

    CVE-2011-4576
    The SSL 3.0 implementation does not properly initialize data
    structures for block cipher padding, which might allow remote
    attackers to obtain sensitive information by decrypting the
    padding data sent by an SSL peer.

    CVE-2011-4619
    The Server Gated Cryptography (SGC) implementation in OpenSSL
    does not properly handle handshake restarts, unnecessarily
    simplifying CPU exhaustion attacks.

    For the oldstable distribution (lenny), these problems have been fixed
    in version 0.9.8g-15+lenny15.

    For the stable distribution (squeeze), these problems have been fixed
    in version 0.9.8o-4squeeze5.

    For the testing distribution (wheezy) and the unstable distribution
    (sid), these problems have been fixed in version 1.0.0f-1.

    We recommend that you upgrade your openssl 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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