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[SECURITY] [DSA 3053-1] openssl security update

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Debian Security Advisory DSA-3053-1                   security@debian.org
http://www.debian.org/security/                           Thijs Kinkhorst
October 16, 2014                       http://www.debian.org/security/faq
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Package        : openssl
CVE ID         : CVE-2014-3513 CVE-2014-3566 CVE-2014-3567 CVE-2014-3568

Several vulnerabilities have been found in OpenSSL, the Secure Sockets
Layer library and toolkit.


    A memory leak flaw was found in the way OpenSSL parsed the DTLS Secure
    Real-time Transport Protocol (SRTP) extension data. A remote attacker
    could send multiple specially crafted handshake messages to exhaust
    all available memory of an SSL/TLS or DTLS server.

CVE-2014-3566 ("POODLE")

    A flaw was found in the way SSL 3.0 handled padding bytes when
    decrypting messages encrypted using block ciphers in cipher block
    chaining (CBC) mode. This flaw allows a man-in-the-middle (MITM)
    attacker to decrypt a selected byte of a cipher text in as few as 256
    tries if they are able to force a victim application to repeatedly send
    the same data over newly created SSL 3.0 connections. 

    This update adds support for Fallback SCSV to mitigate this issue.


    A memory leak flaw was found in the way an OpenSSL handled failed
    session ticket integrity checks. A remote attacker could exhaust all
    available memory of an SSL/TLS or DTLS server by sending a large number
    of invalid session tickets to that server. 


    When OpenSSL is configured with "no-ssl3" as a build option, servers
    could accept and complete a SSL 3.0 handshake, and clients could be
    configured to send them.

For the stable distribution (wheezy), these problems have been fixed in
version 1.0.1e-2+deb7u13.

For the unstable distribution (sid), these problems have been fixed in
version 1.0.1j-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: https://www.debian.org/security/

Mailing list: debian-security-announce@lists.debian.org
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