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-lpdUpgrade cups-printerappUpgrade cupsUpgrade cups-develUpgrade cups-clientUpgrade cups-libsUpgrade cups-filesystemUpgrade cups-ipptool | Nov 16, 2023 | Jun 22, 2023 |
| Alpine Linux | — | Upgrade cups | Mar 26, 2024 | Jun 22, 2023 |
| Amazon Linux Ami 2 | — | Upgrade cupsUpgrade cups-lpdUpgrade cups-develUpgrade cups-filesystemUpgrade cups-ipptoolUpgrade cups-clientUpgrade cups-libsUpgrade cups-debuginfo | Jul 21, 2023 | Jun 22, 2023 |
| Amazon_linux | — | Upgrade cups | Jul 20, 2023 | Jun 22, 2023 |
| Amazon_linux_2023 | — | Upgrade cups-libs-debuginfoUpgrade cups-lpd-debuginfoUpgrade cups-debuginfoUpgrade cups-debugsourceUpgrade cups-filesystemUpgrade cups-develUpgrade cupsUpgrade cups-libsUpgrade cups-clientUpgrade cups-ipptoolUpgrade cups-printerapp-debuginfoUpgrade cups-lpdUpgrade cups-client-debuginfoUpgrade cups-ipptool-debuginfoUpgrade cups-printerapp | 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-lpd-debuginfoUpgrade cups-libsUpgrade cupsUpgrade cups-libs-debuginfoUpgrade cups-debugsourceUpgrade cups-filesystemUpgrade cups-debuginfoUpgrade cups-ipptoolUpgrade cups-printerappUpgrade cups-client-debuginfoUpgrade cups-develUpgrade cups-ipptool-debuginfoUpgrade cups-printerapp-debuginfoUpgrade cups-lpdUpgrade cups-client | 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 cups-lpdUpgrade cups-clientUpgrade cups-filesystemUpgrade cups-libsUpgrade cups | 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-filesystemUpgrade cups-clientUpgrade cups-ipptoolUpgrade cups-printerappUpgrade cups-develUpgrade cupsUpgrade cups-lpd | Nov 16, 2023 | Jun 22, 2023 |
| Redhat_linux | — | Upgrade cups-printerapp-debuginfoUpgrade cups-ipptoolUpgrade cups-libsUpgrade cups-debugsourceUpgrade cups-debuginfoUpgrade cups-ipptool-debuginfoUpgrade cups-clientUpgrade cups-lpd-debuginfoNo solution existsUpgrade cups-lpdUpgrade cups-libs-debuginfoUpgrade cupsUpgrade cups-develUpgrade cups-printerappUpgrade cups-filesystemUpgrade cups-client-debuginfo | Nov 8, 2023 | Jun 22, 2023 |
| Suse | — | Upgrade libcupscgi1-32bitUpgrade libcupsimage2-32bitUpgrade libcupscgi1Upgrade libcupsppdc1Upgrade cups-ddkUpgrade cups-libsUpgrade cups-clientUpgrade cups-develUpgrade libcupsmime1-32bitUpgrade libcupsimage2Upgrade cups-devel-32bitUpgrade cupsUpgrade libcups2-32bitUpgrade libcupsmime1Upgrade libcups2Upgrade cups-configUpgrade cups-libs-32bitUpgrade libcupsppdc1-32bit | 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 |
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