CVE-2017-5495
Quagga Telnet VTY CLI Unbounded Memory Allocation Denial-of-Service
Description
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.
INFO
Published Date :
Jan. 24, 2017, 7:59 a.m.
Last Modified :
Jan. 5, 2018, 2:31 a.m.
Source :
[email protected]
Remotely Exploitable :
Yes !
Impact Score :
3.6
Exploitability Score :
3.9
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2017-5495.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2017-5495 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2017-5495 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
CVE Modified by [email protected]
May. 14, 2024
Action Type Old Value New Value -
CVE Modified by [email protected]
Jan. 05, 2018
Action Type Old Value New Value Added Reference http://rhn.redhat.com/errata/RHSA-2017-0794.html [No Types Assigned] -
CVE Modified by [email protected]
Jul. 26, 2017
Action Type Old Value New Value Added Reference http://www.securitytracker.com/id/1037688 [No Types Assigned] -
Initial Analysis by [email protected]
Jan. 26, 2017
Action Type Old Value New Value Added CVSS V2 (AV:N/AC:L/Au:N/C:N/I:N/A:C) Added CVSS V3 AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H Changed Reference Type https://github.com/freerangerouting/frr/pull/63 No Types Assigned https://github.com/freerangerouting/frr/pull/63 Vendor Advisory, Patch Changed Reference Type http://savannah.nongnu.org/forum/forum.php?forum_id=8783 No Types Assigned http://savannah.nongnu.org/forum/forum.php?forum_id=8783 Release Notes, Vendor Advisory Added CWE CWE-119 Added CPE Configuration OR *cpe:2.3:a:quagga:quagga:1.1.0:*:*:*:*:*:*:* (and previous) -
CVE Modified by [email protected]
Jan. 26, 2017
Action Type Old Value New Value Added Reference https://lists.quagga.net/pipermail/quagga-dev/2017-January/016586.html [No Types Assigned] Added Reference http://www.securityfocus.com/bid/95745 [No Types Assigned]
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2017-5495 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2017-5495
weaknesses.
Exploit Prediction
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.
20.83 }} -5.97%
score
0.96469
percentile