Описание
Security update for cups
This update for cups fixes the following issues
- CVE-2026-27447: Authorization bypass via case-insensitive group-member lookup (bsc#1261572).
- CVE-2026-34978: Path traversal in RSS notify-recipient-uri enables file write outside CacheDir/rss (bsc#1261571).
- CVE-2026-34979: Heap overflow in
get_options()(bsc#1261570). - CVE-2026-34980: Shared PostScript queue lets anonymous Print-Job requests reach
lpcode execution over the network (bsc#1261569). - CVE-2026-34990: Local print admin token disclosure using temporary printers (bsc#1261568).
- CVE-2026-39314: negative
job-password-supportedattribute can lead to a denial of service (bsc#1261743). - CVE-2026-39316: dangling subscription pointer can lead to a denial of service (bsc#1261742).
- CVE-2026-41079: crafted SNMP response can lead to stack-based out-of-bounds read and sensitive memory disclosure (bsc#1263116).
Changes for cups:
-
Version upgrade to 2.4.19.
-
Version upgrade to 2.4.18.
-
Version upgrade to 2.4.17:
- The scheduler followed symbolic links when cleaning out its temporary directory (Issue #1448)
- Updated
cupsFileGetConfandcupsFilePutConfto escape more characters. - Updated man page
cancel(Issue #984) - Updated
cupsRasterReadHeaderto validate more of the page header values (Issue #1501) - Fixed an issue with the class/printer CGI name checking.
- Fixed infinite loop in
http_write()on busy print servers (Issue #827) - Fixed potential TLS blocking issues (Issue #1128)
- Fixed a job history bug in the scheduler (Issue #1440)
- Fixed notifier logging bug that would result in nul bytes getting into the log (Issue #1450)
- Fixed possible use-after-free in
cupsdReadClient()(Issue #1454) - Fixed a document format bug in the IPP backend (Issue #1457)
- Fixed DRAIN_OUTPUT race condition (Issue #1461)
- Fixed a bug when then
ippFindXxxandippSetXxxfunctions were mixed. - Fixed the mapping of supply type keywords to SNMP names.
- Fixed a bug in the IPP backend when SNMP was disabled.
- Fixed a crash bug in the rastertoepson filter.
- Fixed a bug in cgiCheckVariables.
- Fixed handling read/write errors with OpenSSL (Issue #1506)
- Fixed handling rehandshake error in
_httpTLSRead(Issue #1508) - Fixed a debug printf bug on Windows (Issue #1529)
- Fixed a recursion issue with encoding of nested collections (Issue #1539)
- Fixed parsing of the
LimitRequestBody,MaxLogSize, andMaxRequestSizedirectives in "cupsd.conf" (Issue #1540) - Fixed a parsing bug in
ipptool(Issue #1542) - Fixed blank line detection in the
rastertolabelfilter (Issue #1545) - Fixed
httpPeekedge case on compressed streams
Список пакетов
openSUSE Leap 16.0
Ссылки
- SUSE Security Ratings
- SUSE Bug 1261568
- SUSE Bug 1261569
- SUSE Bug 1261570
- SUSE Bug 1261571
- SUSE Bug 1261572
- SUSE Bug 1261742
- SUSE Bug 1261743
- SUSE Bug 1263116
- SUSE CVE CVE-2026-27447 page
- SUSE CVE CVE-2026-34978 page
- SUSE CVE CVE-2026-34979 page
- SUSE CVE CVE-2026-34980 page
- SUSE CVE CVE-2026-34990 page
- SUSE CVE CVE-2026-39314 page
- SUSE CVE CVE-2026-39316 page
- SUSE CVE CVE-2026-41079 page
Описание
OpenPrinting CUPS is an open source printing system for Linux and other Unix-like operating systems. In versions 2.4.16 and prior, CUPS daemon (cupsd) contains an authorization bypass vulnerability due to case-insensitive username comparison during authorization checks. The vulnerability allows an unprivileged user to gain unauthorized access to restricted operations by using a user with a username that differs only in case from an authorized user. At time of publication, there are no publicly available patches.
Затронутые продукты
Ссылки
- CVE-2026-27447
- SUSE Bug 1261572
Описание
OpenPrinting CUPS is an open source printing system for Linux and other Unix-like operating systems. In versions 2.4.16 and prior, the RSS notifier allows .. path traversal in notify-recipient-uri (e.g., rss:///../job.cache), letting a remote IPP client write RSS XML bytes outside CacheDir/rss (anywhere that is lp-writable). In particular, because CacheDir is group-writable by default (typically root:lp and mode 0770), the notifier (running as lp) can replace root-managed state files via temp-file + rename(). This PoC clobbers CacheDir/job.cache with RSS XML, and after restarting cupsd the scheduler fails to parse the job cache and previously queued jobs disappear. At time of publication, there are no publicly available patches.
Затронутые продукты
Ссылки
- CVE-2026-34978
- SUSE Bug 1261571
Описание
OpenPrinting CUPS is an open source printing system for Linux and other Unix-like operating systems. In versions 2.4.16 and prior, there is a heap-based buffer overflow in the CUPS scheduler when building filter option strings from job attribute. At time of publication, there are no publicly available patches.
Затронутые продукты
Ссылки
- CVE-2026-34979
- SUSE Bug 1261570
Описание
OpenPrinting CUPS is an open source printing system for Linux and other Unix-like operating systems. In versions 2.4.16 and prior, in a network-exposed cupsd with a shared target queue, an unauthorized client can send a Print-Job to that shared PostScript queue without authentication. The server accepts a page-border value supplied as textWithoutLanguage, preserves an embedded newline through option escaping and reparse, and then reparses the resulting second-line PPD: text as a trusted scheduler control record. A follow-up raw print job can therefore make the server execute an attacker-chosen existing binary such as /usr/bin/vim as lp. At time of publication, there are no publicly available patches.
Затронутые продукты
Ссылки
- CVE-2026-34980
- SUSE Bug 1261569
Описание
OpenPrinting CUPS is an open source printing system for Linux and other Unix-like operating systems. In versions 2.4.16 and prior, a local unprivileged user can coerce cupsd into authenticating to an attacker-controlled localhost IPP service with a reusable Authorization: Local ... token. That token is enough to drive /admin/ requests on localhost, and the attacker can combine CUPS-Create-Local-Printer with printer-is-shared=true to persist a file:///... queue even though the normal FileDevice policy rejects such URIs. Printing to that queue gives an arbitrary root file overwrite; the PoC below uses that primitive to drop a sudoers fragment and demonstrate root command execution. At time of publication, there are no publicly available patches.
Затронутые продукты
Ссылки
- CVE-2026-34990
- SUSE Bug 1261568
Описание
OpenPrinting CUPS is an open source printing system for Linux and other Unix-like operating systems. In versions 2.4.16 and prior, an integer underflow vulnerability in _ppdCreateFromIPP() (cups/ppd-cache.c) allows any unprivileged local user to crash the cupsd root process by supplying a negative job-password-supported IPP attribute. The bounds check only caps the upper bound, so a negative value passes validation, is cast to size_t (wrapping to ~2^64), and is used as the length argument to memset() on a 33-byte stack buffer. This causes an immediate SIGSEGV in the cupsd root process. Combined with systemd's Restart=on-failure, an attacker can repeat the crash for sustained denial of service.
Затронутые продукты
Ссылки
- CVE-2026-39314
- SUSE Bug 1261743
Описание
OpenPrinting CUPS is an open source printing system for Linux and other Unix-like operating systems. In versions 2.4.16 and prior, a use-after-free vulnerability exists in the CUPS scheduler (cupsd) when temporary printers are automatically deleted. cupsdDeleteTemporaryPrinters() in scheduler/printers.c calls cupsdDeletePrinter() without first expiring subscriptions that reference the printer, leaving cupsd_subscription_t.dest as a dangling pointer to freed heap memory. The dangling pointer is subsequently dereferenced at multiple code sites, causing a crash (denial of service) of the cupsd daemon. With heap grooming, this can be leveraged for code execution.
Затронутые продукты
Ссылки
- CVE-2026-39316
- SUSE Bug 1261742
Описание
OpenPrinting CUPS is an open source printing system for Linux and other Unix-like operating systems. Prior to 2.4.17, a network-adjacent attacker can send a crafted SNMP response to the CUPS SNMP backend that causes an out-of-bounds read of up to 176 bytes past a stack buffer. The leaked memory is converted from UTF-16 to UTF-8 and stored as printer supply description strings, which are subsequently visible to authenticated users via IPP Get-Printer-Attributes responses and the CUPS web interface. This vulnerability is fixed in 2.4.17.
Затронутые продукты
Ссылки
- CVE-2026-41079
- SUSE Bug 1263116