Security update for quagga

SUSE Security Update: Security update for quagga
Announcement ID: SUSE-SU-2018:0455-1
Rating: important
References: #1021669 #1065641 #1079798 #1079799 #1079800 #1079801
Affected Products:
  • SUSE OpenStack Cloud 6
  • SUSE Linux Enterprise Server for SAP 12-SP1
  • SUSE Linux Enterprise Server 12-SP1-LTSS
  • SUSE Linux Enterprise Server 12-LTSS

  • An update that fixes 6 vulnerabilities is now available.

    Description:

    This update for quagga fixes the following security issues:

    - The Quagga BGP daemon contained a bug in the AS_PATH size calculation
    that could have been exploited to facilitate a remote denial-of-service
    attack via specially crafted BGP UPDATE messages. [CVE-2017-16227,
    bsc#1065641]

    - The Quagga BGP daemon did not check whether data sent to peers via
    NOTIFY had an invalid attribute length. It was possible to exploit this
    issue and cause the bgpd process to leak sensitive information over the
    network to a configured peer. [CVE-2018-5378, bsc#1079798]

    - The Quagga BGP daemon used to double-free memory when processing certain
    forms of UPDATE messages. This issue could be exploited by sending an
    optional/transitive UPDATE attribute that all conforming eBGP speakers
    should pass along. Consequently, a single UPDATE message could have
    affected many bgpd processes across a wide area of a network. Through
    this vulnerability, attackers could potentially have taken over control
    of affected bgpd processes remotely. [CVE-2018-5379, bsc#1079799]

    - It was possible to overrun internal BGP code-to-string conversion tables
    in the Quagga BGP daemon. Configured peers could have exploited this
    issue and cause bgpd to emit debug and warning messages into the logs
    that would contained arbitrary bytes. [CVE-2018-5380, bsc#1079800]

    - The Quagga BGP daemon could have entered an infinite loop if sent an
    invalid OPEN message by a configured peer. If this issue was exploited,
    then bgpd would cease to respond to any other events. BGP sessions would
    have been dropped and not be reestablished. The CLI interface would have
    been unresponsive. The bgpd daemon would have stayed in this state until
    restarted. [CVE-2018-5381, bsc#1079801]

    - The Quagga daemon's telnet "vty" CLI contains an unbounded memory
    allocation bug that could be exploited for a denial-of-service attack on
    the daemon. This issue has been fixed. [CVE-2017-5495, bsc#1021669]

    - The telnet "vty" CLI of the Quagga daemon is no longer enabled by
    default, because the passwords in the default "zebra.conf" config file
    are now disabled. The vty interface is available via "vtysh" utility
    using pam authentication to permit management access for root without
    password. [bsc#1021669]

    Patch Instructions:

    To install this SUSE Security Update use YaST online_update.
    Alternatively you can run the command listed for your product:

    • SUSE OpenStack Cloud 6:
      zypper in -t patch SUSE-OpenStack-Cloud-6-2018-315=1
    • SUSE Linux Enterprise Server for SAP 12-SP1:
      zypper in -t patch SUSE-SLE-SAP-12-SP1-2018-315=1
    • SUSE Linux Enterprise Server 12-SP1-LTSS:
      zypper in -t patch SUSE-SLE-SERVER-12-SP1-2018-315=1
    • SUSE Linux Enterprise Server 12-LTSS:
      zypper in -t patch SUSE-SLE-SERVER-12-2018-315=1

    To bring your system up-to-date, use "zypper patch".

    Package List:

    • SUSE OpenStack Cloud 6 (x86_64):
      • quagga-0.99.22.1-16.4.1
      • quagga-debuginfo-0.99.22.1-16.4.1
      • quagga-debugsource-0.99.22.1-16.4.1
    • SUSE Linux Enterprise Server for SAP 12-SP1 (ppc64le x86_64):
      • quagga-0.99.22.1-16.4.1
      • quagga-debuginfo-0.99.22.1-16.4.1
      • quagga-debugsource-0.99.22.1-16.4.1
    • SUSE Linux Enterprise Server 12-SP1-LTSS (ppc64le s390x x86_64):
      • quagga-0.99.22.1-16.4.1
      • quagga-debuginfo-0.99.22.1-16.4.1
      • quagga-debugsource-0.99.22.1-16.4.1
    • SUSE Linux Enterprise Server 12-LTSS (ppc64le s390x x86_64):
      • quagga-0.99.22.1-16.4.1
      • quagga-debuginfo-0.99.22.1-16.4.1
      • quagga-debugsource-0.99.22.1-16.4.1

    References: