The Quarterly Threat Landscape Report is out. See what attackers are targeting now.Read report
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.
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Alma_linux | — | Upgrade cups-lpdUpgrade cups-develUpgrade cups-printerappUpgrade cupsUpgrade cups-ipptoolUpgrade cups-libsUpgrade cups-clientUpgrade cups-filesystem | Nov 16, 2023 | Jun 22, 2023 |
| Alpine Linux | — | Upgrade cups | Mar 26, 2024 | Jun 22, 2023 |
| Amazon Linux Ami 2 | — | Upgrade cups-clientUpgrade cups-ipptoolUpgrade cups-filesystemUpgrade cups-debuginfoUpgrade cups-libsUpgrade cups-lpdUpgrade cupsUpgrade cups-devel | Jul 21, 2023 | Jun 22, 2023 |
| Amazon_linux | — | Upgrade cups | Jul 20, 2023 | Jun 22, 2023 |
| Amazon_linux_2023 | — | Upgrade cups-printerappUpgrade cups-lpdUpgrade cups-printerapp-debuginfoUpgrade cups-ipptool-debuginfoUpgrade cups-clientUpgrade cups-client-debuginfoUpgrade cups-ipptoolUpgrade cups-lpd-debuginfoUpgrade cups-libsUpgrade cups-filesystemUpgrade cups-debuginfoUpgrade cups-develUpgrade cups-libs-debuginfoUpgrade cupsUpgrade cups-debugsource | Feb 17, 2025 | Jun 22, 2023 |
| Apple Osx Cups | — | Upgrade macOS to the latest version | Jul 28, 2023 | Jul 27, 2023 |
| Centos_linux | — | Upgrade cups-ipptool-debuginfoUpgrade cups-client-debuginfoUpgrade cups-clientUpgrade cups-printerappUpgrade cups-develUpgrade cups-lpdUpgrade cups-printerapp-debuginfoUpgrade cupsUpgrade cups-libsUpgrade cups-libs-debuginfoUpgrade cups-lpd-debuginfoUpgrade cups-filesystemUpgrade cups-debugsourceUpgrade cups-ipptoolUpgrade cups-debuginfo | Nov 8, 2023 | Jun 22, 2023 |
| Debian | — | Upgrade cups | Jul 4, 2023 | Jun 22, 2023 |
| Gentoo Linux | — | Upgrade net-print/cups. | Feb 19, 2024 | Jun 22, 2023 |
| Huawei Euleros 2_0_sp10 | — | Upgrade cups-libs | Jan 10, 2024 | Jun 22, 2023 |
| Huawei Euleros 2_0_sp11 | — | Upgrade cups-libs | Jan 10, 2024 | Jun 22, 2023 |
| Huawei Euleros 2_0_sp8 | — | Upgrade cups-develUpgrade cupsUpgrade cups-lpdUpgrade cups-libsUpgrade cups-clientUpgrade cups-filesystem | Jan 10, 2024 | Jun 22, 2023 |
| Huawei Euleros 2_0_sp9 | — | Upgrade cups-libs | Aug 9, 2023 | Jun 22, 2023 |
| Oracle_linux | — | Upgrade cups-libsUpgrade cups-clientUpgrade cups-filesystemUpgrade cups-ipptoolUpgrade cupsUpgrade cups-printerappUpgrade cups-develUpgrade cups-lpd | Nov 16, 2023 | Jun 22, 2023 |
| Redhat_linux | — | Upgrade cups-ipptool-debuginfoUpgrade cups-debugsourceUpgrade cups-debuginfoUpgrade cups-printerapp-debuginfoUpgrade cups-libsUpgrade cups-clientUpgrade cups-ipptoolUpgrade cups-libs-debuginfoUpgrade cups-printerappUpgrade cupsUpgrade cups-client-debuginfoUpgrade cups-lpd-debuginfoUpgrade cups-develUpgrade cups-filesystemNo solution existsUpgrade cups-lpd | Nov 8, 2023 | Jun 22, 2023 |
| Suse | — | Upgrade cups-devel-32bitUpgrade libcupsmime1Upgrade cups-configUpgrade cups-libs-32bitUpgrade libcupsimage2Upgrade libcupsppdc1-32bitUpgrade cupsUpgrade cups-develUpgrade libcupsmime1-32bitUpgrade libcups2-32bitUpgrade libcups2Upgrade libcupscgi1Upgrade cups-ddkUpgrade libcupsppdc1Upgrade cups-libsUpgrade libcupscgi1-32bitUpgrade libcupsimage2-32bitUpgrade cups-client | Jun 23, 2023 | Jun 22, 2023 |
| Ubuntu | — | Upgrade cupsUpgrade cups (Ubuntu Pro) | Jun 23, 2023 | Jun 22, 2023 |
| Vmware Photon_os | — | Use 'tdnf update' to upgrade all packages to the latest version. | Jan 20, 2025 | Jun 22, 2023 |
With curated Threat Intelligence, you can see which vulnerabilities truly put you at risk, prioritize what matters most, and act before attackers do.
Explore Intelligence Hub