CVE-2017-5495

CVE Details

Release Date:

2017-01-23

Description

All versions of Quagga, 0.93 through 1.1.0, are vulnerable to anunbounded 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.

See more information about CVE-2017-5495 from MITRE CVE dictionary and NIST NVD

CVSS v2.0 metrics

NOTE: The following CVSS v2.0 metrics and score provided are preliminary and subject to review.

Base Score:	7.8	Base Metrics:	AV:N/AC:L/Au:N/C:N/I:N/A:C
Access Vector:	Network	Attack Complexity:	Low
Authentication:	None required	Confidentiality Impact:	None
Integrity Impact:	None	Availability Impact:	Complete

Errata information

Platform	Errata	Release Date
Oracle Linux version 6 (quagga)	ELSA-2017-0794	2017-03-27

This page is generated automatically and has not been checked for errors or omissions. For clarification or corrections please contact the Oracle Linux ULN team