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Debian DSA-5419-1 : c-ares - security update

medium Nessus Plugin ID 176888

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Synopsis

The remote Debian host is missing one or more security-related updates.

Description

The remote Debian 11 host has packages installed that are affected by multiple vulnerabilities as referenced in the dsa-5419 advisory.

 - c-ares is an asynchronous resolver library. ares_inet_net_pton() is vulnerable to a buffer underflow for certain ipv6 addresses, in particular 0::00:00:00/2 was found to cause an issue. C-ares only uses this function internally for configuration purposes which would require an administrator to configure such an address via ares_set_sortlist(). However, users may externally use ares_inet_net_pton() for other purposes and thus be vulnerable to more severe issues. This issue has been fixed in 1.19.1. (CVE-2023-31130)

 - c-ares is an asynchronous resolver library. c-ares is vulnerable to denial of service. If a target resolver sends a query, the attacker forges a malformed UDP packet with a length of 0 and returns them to the target resolver. The target resolver erroneously interprets the 0 length as a graceful shutdown of the connection. This issue has been patched in version 1.19.1. (CVE-2023-32067)

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

Solution

Upgrade the c-ares packages.

For the stable distribution (bullseye), these problems have been fixed in version 1.17.1-1+deb11u3.

See Also

https://security-tracker.debian.org/tracker/source-package/c-ares

https://www.debian.org/security/2023/dsa-5419

https://security-tracker.debian.org/tracker/CVE-2023-31130

https://security-tracker.debian.org/tracker/CVE-2023-32067

https://packages.debian.org/source/bullseye/c-ares

Plugin Details

Severity: Medium

ID: 176888

File Name: debian_DSA-5419.nasl

Version: 1.0

Type: local

Agent: unix

Published: 6/7/2023

Updated: 6/7/2023

Supported Sensors: Agentless Assessment, Frictionless Assessment Agent, Nessus Agent, Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 6.7

CVSS v2

Risk Factor: Medium

Base Score: 5.9

Temporal Score: 4.4

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

CVSS Score Source: CVE-2023-31130

CVSS v3

Risk Factor: Medium

Base Score: 6.4

Temporal Score: 5.6

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

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

Vulnerability Information

CPE: cpe:/o:debian:debian_linux:11.0, p-cpe:/a:debian:debian_linux:libc-ares2, p-cpe:/a:debian:debian_linux:libc-ares-dev

Required KB Items: Host/local_checks_enabled, Host/Debian/release, Host/Debian/dpkg-l

Exploit Ease: No known exploits are available

Patch Publication Date: 6/7/2023

Vulnerability Publication Date: 5/24/2023

Reference Information

CVE: CVE-2023-31130, CVE-2023-32067