CVE - CVE-2023-34241

CVE-ID
CVE-2023-34241	Learn more at National Vulnerability Database (NVD) • CVSS Severity Rating • Fix Information • Vulnerable Software Versions • SCAP Mappings • CPE Information
Description
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.
References
Note: References are provided for the convenience of the reader to help distinguish between vulnerabilities. The list is not intended to be complete.
CONFIRM:https://support.apple.com/kb/HT213843 CONFIRM:https://support.apple.com/kb/HT213844 CONFIRM:https://support.apple.com/kb/HT213845 FEDORA:FEDORA-2023-9dbd5b28d4 URL:https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/7I7DWGYGEMBNLZF5UQBMF3SONR37YUBN/ FEDORA:FEDORA-2023-fac5968b55 URL:https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/TBIYKDS3UG3W4Z7YOHTR2AWFNBRYPNYY/ MISC:https://github.com/OpenPrinting/cups/commit/9809947a959e18409dcf562a3466ef246cb90cb2 URL:https://github.com/OpenPrinting/cups/commit/9809947a959e18409dcf562a3466ef246cb90cb2 MISC:https://github.com/OpenPrinting/cups/releases/tag/v2.4.6 URL:https://github.com/OpenPrinting/cups/releases/tag/v2.4.6 MISC:https://github.com/OpenPrinting/cups/security/advisories/GHSA-qjgh-5hcq-5f25 URL:https://github.com/OpenPrinting/cups/security/advisories/GHSA-qjgh-5hcq-5f25 MLIST:[debian-lts-announce] 20230630 [SECURITY] [DLA 3476-1] cups security update URL:https://lists.debian.org/debian-lts-announce/2023/06/msg00038.html MLIST:[oss-security] 20230623 Re: CVE-2023-34241: CUPS: use-after-free in cupsdAcceptClient() URL:http://www.openwall.com/lists/oss-security/2023/06/23/10 MLIST:[oss-security] 20230626 Re: CVE-2023-34241: CUPS: use-after-free in cupsdAcceptClient() URL:http://www.openwall.com/lists/oss-security/2023/06/26/1
Assigning CNA
GitHub (maintainer security advisories)
Date Record Created
20230531	Disclaimer: The record creation date may reflect when the CVE ID was allocated or reserved, and does not necessarily indicate when this vulnerability was discovered, shared with the affected vendor, publicly disclosed, or updated in CVE.
Phase (Legacy)
Assigned (20230531)
Votes (Legacy)

Comments (Legacy)

Proposed (Legacy)
N/A
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