SUSE SLES11 Security Update : quagga (SUSE-SU-2018:0457-1)

High Nessus Plugin ID 106868

Synopsis

The remote SUSE host is missing one or more security updates.

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]

Note that Tenable Network Security has extracted the preceding description block directly from the SUSE security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

Solution

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

SUSE Linux Enterprise Software Development Kit 11-SP4:zypper in -t patch sdksp4-quagga-13471=1

SUSE Linux Enterprise Server 11-SP4:zypper in -t patch slessp4-quagga-13471=1

SUSE Linux Enterprise Server 11-SP3-LTSS:zypper in -t patch slessp3-quagga-13471=1

SUSE Linux Enterprise Point of Sale 11-SP3:zypper in -t patch sleposp3-quagga-13471=1

SUSE Linux Enterprise Debuginfo 11-SP4:zypper in -t patch dbgsp4-quagga-13471=1

SUSE Linux Enterprise Debuginfo 11-SP3:zypper in -t patch dbgsp3-quagga-13471=1

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

See Also

https://bugzilla.suse.com/show_bug.cgi?id=1021669

https://bugzilla.suse.com/show_bug.cgi?id=1065641

https://bugzilla.suse.com/show_bug.cgi?id=1079798

https://bugzilla.suse.com/show_bug.cgi?id=1079799

https://bugzilla.suse.com/show_bug.cgi?id=1079800

https://bugzilla.suse.com/show_bug.cgi?id=1079801

https://www.suse.com/security/cve/CVE-2017-16227/

https://www.suse.com/security/cve/CVE-2017-5495/

https://www.suse.com/security/cve/CVE-2018-5378/

https://www.suse.com/security/cve/CVE-2018-5379/

https://www.suse.com/security/cve/CVE-2018-5380/

https://www.suse.com/security/cve/CVE-2018-5381/

http://www.nessus.org/u?c6295f87

Plugin Details

Severity: High

ID: 106868

File Name: suse_SU-2018-0457-1.nasl

Version: 3.5

Type: local

Agent: unix

Published: 2018/02/16

Updated: 2018/12/01

Dependencies: 12634

Risk Information

Risk Factor: High

CVSS v2.0

Base Score: 7.8

Temporal Score: 5.8

Vector: CVSS2#AV:N/AC:L/Au:N/C:N/I:N/A:C

Temporal Vector: CVSS2#E:U/RL:OF/RC:C

CVSS v3.0

Base Score: 9.8

Temporal Score: 8.5

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C

Vulnerability Information

CPE: p-cpe:/a:novell:suse_linux:quagga, cpe:/o:novell:suse_linux:11

Required KB Items: Host/local_checks_enabled, Host/cpu, Host/SuSE/release, Host/SuSE/rpm-list

Exploit Available: false

Exploit Ease: No known exploits are available

Patch Publication Date: 2018/02/15

Reference Information

CVE: CVE-2017-16227, CVE-2017-5495, CVE-2018-5378, CVE-2018-5379, CVE-2018-5380, CVE-2018-5381