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  • [SECURITY] [DSA 3688-1] nss security update

    From Florian Weimer@1:229/2 to All on Wed Oct 5 22:30:01 2016
    From: [email protected]

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    - ------------------------------------------------------------------------- Debian Security Advisory DSA-3688-1 [email protected] https://www.debian.org/security/ Florian Weimer October 05, 2016 https://www.debian.org/security/faq
    - -------------------------------------------------------------------------

    Package : nss
    CVE ID : CVE-2015-4000 CVE-2015-7181 CVE-2015-7182 CVE-2015-7575
    CVE-2016-1938 CVE-2016-1950 CVE-2016-1978 CVE-2016-1979
    CVE-2016-2834
    Debian Bug : 583651

    Several vulnerabilities were discovered in NSS, the cryptography
    library developed by the Mozilla project.

    CVE-2015-4000

    David Adrian et al. reported that it may be feasible to attack
    Diffie-Hellman-based cipher suites in certain circumstances,
    compromising the confidentiality and integrity of data encrypted
    with Transport Layer Security (TLS).

    CVE-2015-7181
    CVE-2015-7182
    CVE-2016-1950

    Tyson Smith, David Keeler, and Francis Gabriel discovered
    heap-based buffer overflows in the ASN.1 DER parser, potentially
    leading to arbitrary code execution.

    CVE-2015-7575

    Karthikeyan Bhargavan discovered that TLS client implementation
    accepted MD5-based signatures for TLS 1.2 connections with forward
    secrecy, weakening the intended security strength of TLS
    connections.

    CVE-2016-1938

    Hanno Boeck discovered that NSS miscomputed the result of integer
    division for certain inputs. This could weaken the cryptographic
    protections provided by NSS. However, NSS implements RSA-CRT leak
    hardening, so RSA private keys are not directly disclosed by this
    issue.

    CVE-2016-1978

    Eric Rescorla discovered a user-after-free vulnerability in the
    implementation of ECDH-based TLS handshakes, with unknown
    consequences.

    CVE-2016-1979

    Tim Taubert discovered a use-after-free vulnerability in ASN.1 DER
    processing, with application-specific impact.

    CVE-2016-2834

    Tyson Smith and Jed Davis discovered unspecified memory-safety
    bugs in NSS.

    In addition, the NSS library did not ignore environment variables in
    processes which underwent a SUID/SGID/AT_SECURE transition at process
    start. In certain system configurations, this allowed local users to
    escalate their privileges.

    This update contains further correctness and stability fixes without
    immediate security impact.

    For the stable distribution (jessie), these problems have been fixed in
    version 2:3.26-1+debu8u1.

    For the unstable distribution (sid), these problems have been fixed in
    version 2:3.23-1.

    We recommend that you upgrade your nss 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: [email protected]
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