CVE-2024-35235

MEDIUM EPSS 82.1%
Published Jun 11, 20242y ago · Modified Jun 17, 20261w ago
6.7 CVSS 3.1
Medium
Find Similar
Published Jun 11, 2024 2y ago
Last Modified Jun 17, 2026 1w ago

Description

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.

CVSS Details

Base Score
6.7
Exploitability
0.8
Impact
5.9
Vector string
CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
Attack Vector Local
Attack Complexity Low
Privileges Required High
User Interaction None
Scope Unchanged
Confidentiality High
Integrity High
Availability High

Threat Intelligence

EPSS Exploit Probability
82.1% percentile
Exploit & Patch Status
Public Exploit Known
Patch Available

Weaknesses 2

CWE-252
CWE-59

Affected Products 2

VendorProductVersionRange
openprintingcups* ≤2.4.8
debiandebian_linux10.0any

References 9

  • openwall.com http://www.openwall.com/lists/oss-security/2024/06/11/1
    ExploitMailing ListThird Party Advisory
  • openwall.com http://www.openwall.com/lists/oss-security/2024/06/12/4
    Mailing List
  • openwall.com http://www.openwall.com/lists/oss-security/2024/06/12/5
    Mailing List
  • openwall.com http://www.openwall.com/lists/oss-security/2024/11/08/3
    Mailing List
  • git.launchpad.net https://git.launchpad.net/ubuntu/+source/apparmor/tree/profiles/apparmor.d/abstractions/user-tmp#n21
    Product
  • github.com https://github.com/OpenPrinting/cups/blob/aba917003c8de55e5bf85010f0ecf1f1ddd1408e/cups/http-addr.c#L229-L240
    Product
  • github.com https://github.com/OpenPrinting/cups/commit/ff1f8a623e090dee8a8aadf12a6a4b25efac143d
    Patch
  • github.com https://github.com/OpenPrinting/cups/security/advisories/GHSA-vvwp-mv6j-hw6f
    ExploitVendor Advisory
  • lists.debian.org https://lists.debian.org/debian-lts-announce/2024/06/msg00001.html
    Mailing List

Remediation

  • github.com https://github.com/OpenPrinting/cups/commit/ff1f8a623e090dee8a8aadf12a6a4b25efac143d
    Patch