Security update for quagga

Announcement ID: SUSE-SU-2018:0457-1
Rating: important
References:
Cross-References:
CVSS scores:
  • CVE-2017-16227 ( NVD ): 7.5 CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
  • CVE-2017-5495 ( NVD ): 7.5 CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
  • CVE-2018-5378 ( NVD ): 5.9 CVSS:3.0/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:H
  • CVE-2018-5379 ( NVD ): 9.8 CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
  • CVE-2018-5380 ( NVD ): 4.3 CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L
  • CVE-2018-5381 ( NVD ): 7.5 CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Affected Products:
  • SLES for SAP Applications 11-SP4
  • SUSE Linux Enterprise Point of Service 11 SP3
  • SUSE Linux Enterprise Server 11 SP3 LTSS 11-SP3
  • SUSE Linux Enterprise Server 11 SP4
  • SUSE Linux Enterprise Software Development Kit 11 SP4

An update that solves six vulnerabilities can now be installed.

Description:

This update for quagga fixes the following 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 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 Point of Service 11 SP3
    zypper in -t patch sleposp3-quagga-13471=1
  • SUSE Linux Enterprise Software Development Kit 11 SP4
    zypper in -t patch sdksp4-quagga-13471=1
  • SUSE Linux Enterprise Server 11 SP3 LTSS 11-SP3
    zypper in -t patch slessp3-quagga-13471=1
  • SUSE Linux Enterprise Server 11 SP4
    zypper in -t patch slessp4-quagga-13471=1
  • SLES for SAP Applications 11-SP4
    zypper in -t patch slessp4-quagga-13471=1

Package List:

  • SUSE Linux Enterprise Point of Service 11 SP3 (i586)
    • quagga-0.99.15-0.30.3.1
  • SUSE Linux Enterprise Software Development Kit 11 SP4 (x86_64 i586)
    • quagga-0.99.15-0.30.3.1
  • SUSE Linux Enterprise Software Development Kit 11 SP4 (s390x x86_64 i586 ppc64 ia64)
    • quagga-devel-0.99.15-0.30.3.1
  • SUSE Linux Enterprise Server 11 SP3 LTSS 11-SP3 (s390x x86_64 i586)
    • quagga-0.99.15-0.30.3.1
  • SUSE Linux Enterprise Server 11 SP4 (s390x x86_64 i586 ppc64 ia64)
    • quagga-0.99.15-0.30.3.1
  • SLES for SAP Applications 11-SP4 (ppc64 x86_64)
    • quagga-0.99.15-0.30.3.1

References: