SUSE-SU-2018:3392-1: moderate: Security update for python-cryptography

[sle-security-updates at lists.suse.com]

   SUSE Security Update: Security update for python-cryptography
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Announcement ID:    SUSE-SU-2018:3392-1
Rating:             moderate
References:         #1101820 
Cross-References:   CVE-2018-10903
Affected Products:
                    SUSE Linux Enterprise Module for Basesystem 15
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   An update that fixes one vulnerability is now available.

Description:

   This update for python-cryptography fixes the following issues:

   - CVE-2018-10903: The finalize_with_tag API did not enforce a minimum tag
     length. If a user did not validate the input length prior to passing it
     to finalize_with_tag an attacker could craft an invalid payload with a
     shortened tag (e.g. 1 byte) such that they would have a 1 in 256 chance
     of passing the MAC check. GCM tag forgeries could have caused key
     leakage (bsc#1101820).


Patch Instructions:

   To install this SUSE Security Update use the SUSE recommended installation methods
   like YaST online_update or "zypper patch".

   Alternatively you can run the command listed for your product:

   - SUSE Linux Enterprise Module for Basesystem 15:

      zypper in -t patch SUSE-SLE-Module-Basesystem-15-2018-2430=1



Package List:

   - SUSE Linux Enterprise Module for Basesystem 15 (aarch64 ppc64le s390x x86_64):

      python-cryptography-debuginfo-2.1.4-4.3.1
      python-cryptography-debugsource-2.1.4-4.3.1
      python2-cryptography-2.1.4-4.3.1
      python2-cryptography-debuginfo-2.1.4-4.3.1
      python3-cryptography-2.1.4-4.3.1
      python3-cryptography-debuginfo-2.1.4-4.3.1


References:

   https://www.suse.com/security/cve/CVE-2018-10903.html
   https://bugzilla.suse.com/1101820