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