Test ID:	1.3.6.1.4.1.25623.1.0.170541
Category:	General
Title:	CUPS 2.2.0 < 2.4.6 Use After Free Vulnerability
Summary:	CUPS is prone to an use after free vulnerability.
Description:	Summary: CUPS is prone to an use after free vulnerability. Vulnerability Insight: 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`. Affected Software/OS: CUPS version 2.2.0 prior to 2.4.6. Solution: Update to version 2.4.6 or later. CVSS Score: 6.2 CVSS Vector: AV:L/AC:L/Au:S/C:C/I:N/A:C
Cross-Ref:	Common Vulnerability Exposure (CVE) ID: CVE-2023-34241 https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/7I7DWGYGEMBNLZF5UQBMF3SONR37YUBN/ https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/TBIYKDS3UG3W4Z7YOHTR2AWFNBRYPNYY/ https://github.com/OpenPrinting/cups/commit/9809947a959e18409dcf562a3466ef246cb90cb2 https://github.com/OpenPrinting/cups/releases/tag/v2.4.6 https://github.com/OpenPrinting/cups/security/advisories/GHSA-qjgh-5hcq-5f25 https://lists.debian.org/debian-lts-announce/2023/06/msg00038.html http://www.openwall.com/lists/oss-security/2023/06/23/10 http://www.openwall.com/lists/oss-security/2023/06/26/1
Copyright	Copyright (C) 2023 Greenbone AG

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