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Allocation of Resources Without Limits or Throttling Affecting quagga-devel package, versions <0:0.99.15-14.el6

Severity

 Recommended
0.0
medium
0
10

Based on CentOS security rating.

Threat Intelligence

EPSS
20.83% (97th percentile)

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  • Snyk IDSNYK-CENTOS6-QUAGGADEVEL-2138379
  • published26 Jul 2021
  • disclosed23 Jan 2017
Report a new vulnerability Found a mistake?

Introduced: 23 Jan 2017

CVE-2017-5495  (opens in a new tab)
CWE-770  (opens in a new tab)

How to fix?

Upgrade Centos:6 quagga-devel to version 0:0.99.15-14.el6 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream quagga-devel package and not the quagga-devel package as distributed by Centos. See How to fix? for Centos:6 relevant fixed versions and status.

All versions of Quagga, 0.93 through 1.1.0, are vulnerable to an unbounded memory allocation in the telnet 'vty' CLI, leading to a Denial-of-Service of Quagga daemons, or even the entire host. When Quagga daemons are configured with their telnet CLI enabled, anyone who can connect to the TCP ports can trigger this vulnerability, prior to authentication. Most distributions restrict the Quagga telnet interface to local access only by default. The Quagga telnet interface 'vty' input buffer grows automatically, without bound, so long as a newline is not entered. This allows an attacker to cause the Quagga daemon to allocate unbounded memory by sending very long strings without a newline. Eventually the daemon is terminated by the system, or the system itself runs out of memory. This is fixed in Quagga 1.1.1 and Free Range Routing (FRR) Protocol Suite 2017-01-10.