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.
CVSS Details
- CVSS 3.1 Base Score: 5.3
- CVSS 3.1 Vector: (CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H)
Covered by Rapid7
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Alma_linux | — | Upgrade cups-filesystemUpgrade cups-ipptoolUpgrade cups-clientUpgrade cupsUpgrade cups-lpdUpgrade cups-printerappUpgrade cups-develUpgrade cups-libs | Nov 16, 2023 | Jun 22, 2023 |
| Alpine Linux | — | Upgrade cups | Mar 26, 2024 | Jun 22, 2023 |
| Amazon Linux Ami 2 | — | Upgrade cups-debuginfoUpgrade cups-clientUpgrade cups-filesystemUpgrade cups-libsUpgrade cups-ipptoolUpgrade cupsUpgrade cups-lpdUpgrade 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-ipptoolUpgrade cups-clientUpgrade cups-printerapp-debuginfoUpgrade cups-lpdUpgrade cups-ipptool-debuginfoUpgrade cups-client-debuginfoUpgrade cups-libsUpgrade cups-filesystemUpgrade cups-debuginfoUpgrade cups-develUpgrade cups-debugsourceUpgrade cupsUpgrade cups-lpd-debuginfoUpgrade cups-libs-debuginfo | Feb 17, 2025 | Jun 22, 2023 |
| Apple Osx Cups | — | Upgrade macOS to the latest version | Jul 28, 2023 | Jun 22, 2023 |
| Centos_linux | — | Upgrade cups-printerapp-debuginfoUpgrade cups-ipptool-debuginfoUpgrade cups-printerappUpgrade cups-clientUpgrade cups-client-debuginfoUpgrade cups-develUpgrade cups-lpdUpgrade cups-lpd-debuginfoUpgrade cups-debugsourceUpgrade cups-debuginfoUpgrade cups-libs-debuginfoUpgrade cups-libsUpgrade cups-ipptoolUpgrade cupsUpgrade cups-filesystem | 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-lpdUpgrade cups-develUpgrade cupsUpgrade cups-filesystemUpgrade cups-clientUpgrade cups-libs | Jan 10, 2024 | Jun 22, 2023 |
| Huawei Euleros 2_0_sp9 | — | Upgrade cups-libs | Aug 9, 2023 | Jun 22, 2023 |
| Oracle_linux | — | Upgrade cups-ipptoolUpgrade cups-filesystemUpgrade cups-clientUpgrade cups-libsUpgrade cups-develUpgrade cups-lpdUpgrade cupsUpgrade cups-printerapp | Nov 16, 2023 | Jun 22, 2023 |
| Redhat_linux | — | Upgrade cups-printerapp-debuginfoUpgrade cups-libsUpgrade cups-debuginfoUpgrade cups-ipptool-debuginfoUpgrade cups-clientUpgrade cups-debugsourceUpgrade cups-ipptoolUpgrade cups-client-debuginfoNo solution existsUpgrade cups-lpdUpgrade cupsUpgrade cups-printerappUpgrade cups-libs-debuginfoUpgrade cups-lpd-debuginfoUpgrade cups-filesystemUpgrade cups-devel | Nov 8, 2023 | Jun 22, 2023 |
| Suse | — | Upgrade libcups2-32bitUpgrade cups-configUpgrade libcups2Upgrade libcupsmime1Upgrade cupsUpgrade libcupsmime1-32bitUpgrade libcupsppdc1-32bitUpgrade cups-devel-32bitUpgrade cups-develUpgrade libcupsimage2Upgrade cups-libs-32bitUpgrade cups-libsUpgrade cups-ddkUpgrade libcupsppdc1Upgrade cups-clientUpgrade libcupsimage2-32bitUpgrade libcupscgi1-32bitUpgrade libcupscgi1 | Jun 23, 2023 | Jun 22, 2023 |
| Ubuntu | — | Upgrade cups (Ubuntu Pro)Upgrade cups | 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 |
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