CVE-2024-35235 (GCVE-0-2024-35235)
Vulnerability from cvelistv5
Published
2024-06-11 14:13
Modified
2025-02-21 16:56
Severity ?
4.4 (Medium) - CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N
CWE
  • CWE-59 - Improper Link Resolution Before File Access ('Link Following')
  • CWE-252 - Unchecked Return Value
Summary
OpenPrinting CUPS is an open source printing system for Linux and other Unix-like operating systems. In versions 2.4.8 and earlier, when starting the cupsd server with a Listen configuration item pointing to a symbolic link, the cupsd process can be caused to perform an arbitrary chmod of the provided argument, providing world-writable access to the target. Given that cupsd is often running as root, this can result in the change of permission of any user or system files to be world writable. Given the aforementioned Ubuntu AppArmor context, on such systems this vulnerability is limited to those files modifiable by the cupsd process. In that specific case it was found to be possible to turn the configuration of the Listen argument into full control over the cupsd.conf and cups-files.conf configuration files. By later setting the User and Group arguments in cups-files.conf, and printing with a printer configured by PPD with a `FoomaticRIPCommandLine` argument, arbitrary user and group (not root) command execution could be achieved, which can further be used on Ubuntu systems to achieve full root command execution. Commit ff1f8a623e090dee8a8aadf12a6a4b25efac143d contains a patch for the issue.
References
security-advisories@github.com http://www.openwall.com/lists/oss-security/2024/06/11/1
security-advisories@github.com http://www.openwall.com/lists/oss-security/2024/06/12/4
security-advisories@github.com http://www.openwall.com/lists/oss-security/2024/06/12/5
security-advisories@github.com https://git.launchpad.net/ubuntu/+source/apparmor/tree/profiles/apparmor.d/abstractions/user-tmp#n21
security-advisories@github.com https://github.com/OpenPrinting/cups/blob/aba917003c8de55e5bf85010f0ecf1f1ddd1408e/cups/http-addr.c#L229-L240
security-advisories@github.com https://github.com/OpenPrinting/cups/commit/ff1f8a623e090dee8a8aadf12a6a4b25efac143d
security-advisories@github.com https://github.com/OpenPrinting/cups/security/advisories/GHSA-vvwp-mv6j-hw6f
security-advisories@github.com https://lists.debian.org/debian-lts-announce/2024/06/msg00001.html
af854a3a-2127-422b-91ae-364da2661108 http://www.openwall.com/lists/oss-security/2024/06/11/1
af854a3a-2127-422b-91ae-364da2661108 http://www.openwall.com/lists/oss-security/2024/06/12/4
af854a3a-2127-422b-91ae-364da2661108 http://www.openwall.com/lists/oss-security/2024/06/12/5
af854a3a-2127-422b-91ae-364da2661108 http://www.openwall.com/lists/oss-security/2024/11/08/3
af854a3a-2127-422b-91ae-364da2661108 https://git.launchpad.net/ubuntu/+source/apparmor/tree/profiles/apparmor.d/abstractions/user-tmp#n21
af854a3a-2127-422b-91ae-364da2661108 https://github.com/OpenPrinting/cups/blob/aba917003c8de55e5bf85010f0ecf1f1ddd1408e/cups/http-addr.c#L229-L240
af854a3a-2127-422b-91ae-364da2661108 https://github.com/OpenPrinting/cups/commit/ff1f8a623e090dee8a8aadf12a6a4b25efac143d
af854a3a-2127-422b-91ae-364da2661108 https://github.com/OpenPrinting/cups/security/advisories/GHSA-vvwp-mv6j-hw6f
af854a3a-2127-422b-91ae-364da2661108 https://lists.debian.org/debian-lts-announce/2024/06/msg00001.html
Impacted products
Vendor Product Version
OpenPrinting cups Version: <= 2.4.8
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}


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