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 | alma-upgrade-cupsalma-upgrade-cups-clientalma-upgrade-cups-develalma-upgrade-cups-filesystemalma-upgrade-cups-ipptoolalma-upgrade-cups-libsalma-upgrade-cups-lpdalma-upgrade-cups-printerapp | Nov 16, 2023 | Jun 22, 2023 | |
| Alpine Linux | alpine-linux-upgrade-cups | Mar 26, 2024 | Jun 22, 2023 | |
| Amazon Linux Ami 2 | amazon-linux-ami-2-upgrade-cupsamazon-linux-ami-2-upgrade-cups-clientamazon-linux-ami-2-upgrade-cups-debuginfoamazon-linux-ami-2-upgrade-cups-develamazon-linux-ami-2-upgrade-cups-filesystemamazon-linux-ami-2-upgrade-cups-ipptoolamazon-linux-ami-2-upgrade-cups-libsamazon-linux-ami-2-upgrade-cups-lpd | Jul 21, 2023 | Jun 22, 2023 | |
| Amazon_linux | — | amazon-linux-upgrade-cups | Jul 20, 2023 | Jun 22, 2023 |
| Amazon_linux_2023 | amazon-linux-2023-upgrade-cupsamazon-linux-2023-upgrade-cups-clientamazon-linux-2023-upgrade-cups-client-debuginfoamazon-linux-2023-upgrade-cups-debuginfoamazon-linux-2023-upgrade-cups-debugsourceamazon-linux-2023-upgrade-cups-develamazon-linux-2023-upgrade-cups-filesystemamazon-linux-2023-upgrade-cups-ipptoolamazon-linux-2023-upgrade-cups-ipptool-debuginfoamazon-linux-2023-upgrade-cups-libsamazon-linux-2023-upgrade-cups-libs-debuginfoamazon-linux-2023-upgrade-cups-lpdamazon-linux-2023-upgrade-cups-lpd-debuginfoamazon-linux-2023-upgrade-cups-printerappamazon-linux-2023-upgrade-cups-printerapp-debuginfo | Feb 17, 2025 | Jun 22, 2023 | |
| Apple Osx Cups | apple-osx-upgrade-latest | Jul 28, 2023 | Jun 22, 2023 | |
| Centos_linux | — | centos-upgrade-cupscentos-upgrade-cups-clientcentos-upgrade-cups-client-debuginfocentos-upgrade-cups-debuginfocentos-upgrade-cups-debugsourcecentos-upgrade-cups-develcentos-upgrade-cups-filesystemcentos-upgrade-cups-ipptoolcentos-upgrade-cups-ipptool-debuginfocentos-upgrade-cups-libscentos-upgrade-cups-libs-debuginfocentos-upgrade-cups-lpdcentos-upgrade-cups-lpd-debuginfocentos-upgrade-cups-printerappcentos-upgrade-cups-printerapp-debuginfo | Nov 8, 2023 | Jun 22, 2023 |
| Debian | debian-upgrade-cups | Jul 4, 2023 | Jun 22, 2023 | |
| Gentoo Linux | gentoo-linux-upgrade-net-print-cups | Feb 19, 2024 | Jun 22, 2023 | |
| Huawei Euleros 2_0_sp10 | huawei-euleros-2_0_sp10-upgrade-cups-libs | Jan 10, 2024 | Jun 22, 2023 | |
| Huawei Euleros 2_0_sp11 | huawei-euleros-2_0_sp11-upgrade-cups-libs | Jan 10, 2024 | Jun 22, 2023 | |
| Huawei Euleros 2_0_sp8 | huawei-euleros-2_0_sp8-upgrade-cupshuawei-euleros-2_0_sp8-upgrade-cups-clienthuawei-euleros-2_0_sp8-upgrade-cups-develhuawei-euleros-2_0_sp8-upgrade-cups-filesystemhuawei-euleros-2_0_sp8-upgrade-cups-libshuawei-euleros-2_0_sp8-upgrade-cups-lpd | Jan 10, 2024 | Jun 22, 2023 | |
| Huawei Euleros 2_0_sp9 | huawei-euleros-2_0_sp9-upgrade-cups-libs | Aug 9, 2023 | Jun 22, 2023 | |
| Oracle_linux | — | oracle-linux-upgrade-cupsoracle-linux-upgrade-cups-clientoracle-linux-upgrade-cups-develoracle-linux-upgrade-cups-filesystemoracle-linux-upgrade-cups-ipptooloracle-linux-upgrade-cups-libsoracle-linux-upgrade-cups-lpdoracle-linux-upgrade-cups-printerapp | Nov 16, 2023 | Jun 22, 2023 |
| Redhat_linux | redhat-upgrade-cupsredhat-upgrade-cups-clientredhat-upgrade-cups-client-debuginforedhat-upgrade-cups-debuginforedhat-upgrade-cups-debugsourceredhat-upgrade-cups-develredhat-upgrade-cups-filesystemredhat-upgrade-cups-ipptoolredhat-upgrade-cups-ipptool-debuginforedhat-upgrade-cups-libsredhat-upgrade-cups-libs-debuginforedhat-upgrade-cups-lpdredhat-upgrade-cups-lpd-debuginforedhat-upgrade-cups-printerappredhat-upgrade-cups-printerapp-debuginfo | Nov 8, 2023 | Jun 22, 2023 | |
| Suse | — | suse-upgrade-cupssuse-upgrade-cups-clientsuse-upgrade-cups-configsuse-upgrade-cups-ddksuse-upgrade-cups-develsuse-upgrade-cups-devel-32bitsuse-upgrade-cups-libssuse-upgrade-cups-libs-32bitsuse-upgrade-libcups2suse-upgrade-libcups2-32bitsuse-upgrade-libcupscgi1suse-upgrade-libcupscgi1-32bitsuse-upgrade-libcupsimage2suse-upgrade-libcupsimage2-32bitsuse-upgrade-libcupsmime1suse-upgrade-libcupsmime1-32bitsuse-upgrade-libcupsppdc1suse-upgrade-libcupsppdc1-32bit | Jun 23, 2023 | Jun 22, 2023 |
| Ubuntu | ubuntu-pro-upgrade-cupsubuntu-upgrade-cups | Jun 23, 2023 | Jun 22, 2023 | |
| Vmware Photon_os | vmware-photon_os_update_tdnf | Jan 20, 2025 | Jun 22, 2023 |
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