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›vulnerability›CVE-2023-34241
Name
CVE-2023-34241
Source
NVD ( link)Debian ( link)
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.
CWEs
CWE-416
Published Date
Updated Date
Workaround
-
Advisories
http://www.openwall.com/lists/oss-security/2023/06/23/10Mailing List
http://www.openwall.com/lists/oss-security/2023/06/26/1Mailing List
https://github.com/OpenPrinting/cups/commit/9809947a959e18409dcf562a3466ef246cb90cb2Patch
https://github.com/OpenPrinting/cups/releases/tag/v2.4.6Release Notes
https://github.com/OpenPrinting/cups/security/advisories/GHSA-qjgh-5hcq-5f25Exploit
https://lists.debian.org/debian-lts-announce/2023/06/msg00038.htmlMailing List
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/7I7DWGYGEMBNLZF5UQBMF3SONR37YUBN/Mailing List
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/TBIYKDS3UG3W4Z7YOHTR2AWFNBRYPNYY/Mailing List
https://support.apple.com/kb/HT213843Third Party Advisory
https://support.apple.com/kb/HT213844Third Party Advisory
https://support.apple.com/kb/HT213845Third Party Advisory
http://www.openwall.com/lists/oss-security/2023/06/23/10Mailing List
http://www.openwall.com/lists/oss-security/2023/06/26/1Mailing List
https://github.com/OpenPrinting/cups/commit/9809947a959e18409dcf562a3466ef246cb90cb2Patch
https://github.com/OpenPrinting/cups/releases/tag/v2.4.6Release Notes
https://github.com/OpenPrinting/cups/security/advisories/GHSA-qjgh-5hcq-5f25Exploit
https://lists.debian.org/debian-lts-announce/2023/06/msg00038.htmlMailing List
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/7I7DWGYGEMBNLZF5UQBMF3SONR37YUBN/Mailing List
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/TBIYKDS3UG3W4Z7YOHTR2AWFNBRYPNYY/Mailing List
https://support.apple.com/kb/HT213843Third Party Advisory
https://support.apple.com/kb/HT213844Third Party Advisory
https://support.apple.com/kb/HT213845Third Party Advisory

Analysis#

Affected Component
Analysis
cups
Patched

Vulnerability Ratings#

5.3
CVSSv31
7.1
CVSSv31
NaN
other

Others affected components#

Name
Project
Project Version
Version
Status
cups
buildroot
2025.02.x
2.4.17
Not Affected
cups
buildroot
master
2.4.19
Not Affected
cups
yocto
master
2.4.19
Not Affected
cups
yocto
scarthgap
2.4.11
Not Affected

Resolved with patches#

cups (yocto:kirkstone)

#
Title
Author
Resolve
1
Log result of httpGetHostname BEFORE closing the connection
Rose <83477269+AtariDreams@users.noreply.github.com>
CVE-2023-34241