[IT-SecNots] [SECURITY] [DSA 3673-1] openssl security update

[Moritz Muehlenhoff <jmm AT debian.org>]

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Debian Security Advisory DSA-3673-1                   security AT debian.org
https://www.debian.org/security/                       Moritz Muehlenhoff
September 22, 2016                    https://www.debian.org/security/faq
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Package        : openssl
CVE ID         : CVE-2016-2177 CVE-2016-2178 CVE-2016-2179 CVE-2016-2180 
                 CVE-2016-2181 CVE-2016-2182 CVE-2016-2183 CVE-2016-6302
                 CVE-2016-6303 CVE-2016-6304 CVE-2016-6306

Several vulnerabilities were discovered in OpenSSL:

CVE-2016-2177

    Guido Vranken discovered that OpenSSL uses undefined pointer
    arithmetic. Additional information can be found at
    
https://www.openssl.org/blog/blog/2016/06/27/undefined-pointer-arithmetic/    

CVE-2016-2178

    Cesar Pereida, Billy Brumley and Yuval Yarom discovered a timing
    leak in the DSA code.

CVE-2016-2179 / CVE-2016-2181

    Quan Luo and the OCAP audit team discovered denial of service
    vulnerabilities in DTLS.

CVE-2016-2180 / CVE-2016-2182 / CVE-2016-6303

    Shi Lei discovered an out-of-bounds memory read in
    TS_OBJ_print_bio() and an out-of-bounds write in BN_bn2dec()
    and MDC2_Update().

CVE-2016-2183

    DES-based cipher suites are demoted from the HIGH group to MEDIUM
    as a mitigation for the SWEET32 attack.

CVE-2016-6302

    Shi Lei discovered that the use of SHA512 in TLS session tickets
    is susceptible to denial of service.

CVE-2016-6304

    Shi Lei discovered that excessively large OCSP status request may
    result in denial of service via memory exhaustion.

CVE-2016-6306

    Shi Lei discovered that missing message length validation when parsing
    certificates may potentially result in denial of service.

For the stable distribution (jessie), these problems have been fixed in
version 1.0.1t-1+deb8u4.

For the unstable distribution (sid), these problems will be fixed soon.

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 AT lists.debian.org
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