Security update for python-cryptography

SUSE Security Update: Security update for python-cryptography
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

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: