Detections
Analytics

GLSA-201701-28 : c-ares: Heap-based buffer overflow

critical Nessus Plugin ID 96422

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Synopsis

The remote Gentoo host is missing one or more security-related patches.

Description

The remote host is affected by the vulnerability described in GLSA-201701-28 (c-ares: Heap-based buffer overflow)

 A hostname with an escaped trailing dot (such as “hello\\.”) would have its size calculated incorrectly leading to a single byte written beyond the end of a buffer on the heap.
 Impact :

 A remote attacker, able to provide a specially crafted hostname to an application using c-ares, could potentially cause a Denial of Service condition.
 Workaround :

 There is no known workaround at this time.

Solution

All c-ares users should upgrade to the latest version:
 # emerge --sync # emerge --ask --oneshot --verbose '>=net-dns/c-ares-1.12.0'

See Also

https://security.gentoo.org/glsa/201701-28

Plugin Details

Severity: Critical

ID: 96422

File Name: gentoo_GLSA-201701-28.nasl

Version: 3.2

Type: local

Published: 1/12/2017

Updated: 1/11/2021

Supported Sensors: Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 6.7

CVSS v2

Risk Factor: High

Base Score: 7.5

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

CVSS v3

Risk Factor: Critical

Base Score: 9.8

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

Vulnerability Information

CPE: cpe:/o:gentoo:linux, p-cpe:/a:gentoo:linux:c-ares

Required KB Items: Host/local_checks_enabled, Host/Gentoo/release, Host/Gentoo/qpkg-list

Patch Publication Date: 1/11/2017

Reference Information

CVE: CVE-2016-5180

GLSA: 201701-28