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Ubuntu 20.04 LTS / 22.04 LTS / 23.04 : CUPS vulnerability (USN-6184-1)

high Nessus Plugin ID 177536

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Synopsis

The remote Ubuntu host is missing a security update.

Description

The remote Ubuntu 20.04 LTS / 22.04 LTS / 22.10 / 23.04 host has packages installed that are affected by a vulnerability as referenced in the USN-6184-1 advisory.

 - OpenPrinting CUPS is a standards-based, open source printing system for Linux and other Unix-like operating systems. Starting in version 2.0.0 and prior to version 2.4.6, CUPS logs data of free memory to the logging service AFTER the connection has been closed, when it should have logged the data right before. This is a use-after-free bug that impacts the entire cupsd process. The exact cause of this issue is the function `httpClose(con->http)` being called in `scheduler/client.c`. The problem is that httpClose always, provided its argument is not null, frees the pointer at the end of the call, only for cupsdLogClient to pass the pointer to httpGetHostname. This issue happens in function `cupsdAcceptClient` if LogLevel is warn or higher and in two scenarios: there is a double-lookup for the IP Address (HostNameLookups Double is set in `cupsd.conf`) which fails to resolve, or if CUPS is compiled with TCP wrappers and the connection is refused by rules from `/etc/hosts.allow` and `/etc/hosts.deny`. Version 2.4.6 has a patch for this issue. (CVE-2023-34241)

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

Solution

Update the affected packages.

See Also

https://ubuntu.com/security/notices/USN-6184-1

Plugin Details

Severity: High

ID: 177536

File Name: ubuntu_USN-6184-1.nasl

Version: 1.3

Type: local

Agent: unix

Published: 6/22/2023

Updated: 10/20/2023

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

Risk Information

VPR

Risk Factor: Medium

Score: 6.0

CVSS v2

Risk Factor: Medium

Base Score: 6.2

Temporal Score: 4.9

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

CVSS Score Source: CVE-2023-34241

CVSS v3

Risk Factor: High

Base Score: 7.1

Temporal Score: 6.4

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

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

Vulnerability Information

CPE: cpe:/o:canonical:ubuntu_linux:20.04:-:lts, cpe:/o:canonical:ubuntu_linux:22.04:-:lts, cpe:/o:canonical:ubuntu_linux:23.04, p-cpe:/a:canonical:ubuntu_linux:cups, p-cpe:/a:canonical:ubuntu_linux:cups-bsd, p-cpe:/a:canonical:ubuntu_linux:cups-client, p-cpe:/a:canonical:ubuntu_linux:cups-common, p-cpe:/a:canonical:ubuntu_linux:cups-core-drivers, p-cpe:/a:canonical:ubuntu_linux:cups-daemon, p-cpe:/a:canonical:ubuntu_linux:cups-ipp-utils, p-cpe:/a:canonical:ubuntu_linux:cups-ppdc, p-cpe:/a:canonical:ubuntu_linux:cups-server-common, p-cpe:/a:canonical:ubuntu_linux:libcups2, p-cpe:/a:canonical:ubuntu_linux:libcups2-dev, p-cpe:/a:canonical:ubuntu_linux:libcupsimage2, p-cpe:/a:canonical:ubuntu_linux:libcupsimage2-dev

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

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 6/22/2023

Vulnerability Publication Date: 6/22/2023

Reference Information

CVE: CVE-2023-34241

USN: 6184-1