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Slackware Linux 14.2 / 15.0 / current cups Vulnerability (SSA:2023-173-01)

high Nessus Plugin ID 177540

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Synopsis

The remote Slackware Linux host is missing a security update to cups.

Description

The version of cups installed on the remote host is prior to 2.1.4 / 2.4.6. It is, therefore, affected by a vulnerability as referenced in the SSA:2023-173-01 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

Upgrade the affected cups package.

See Also

http://www.nessus.org/u?af0586a2

Plugin Details

Severity: High

ID: 177540

File Name: Slackware_SSA_2023-173-01.nasl

Version: 1.2

Type: local

Published: 6/22/2023

Updated: 8/2/2023

Supported Sensors: 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: p-cpe:/a:slackware:slackware_linux:cups, cpe:/o:slackware:slackware_linux, cpe:/o:slackware:slackware_linux:14.2, cpe:/o:slackware:slackware_linux:15.0

Required KB Items: Host/local_checks_enabled, Host/Slackware/release, Host/Slackware/packages

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