CVE-2024-47076

CUPS is a standards-based, open-source printing system, and libcupsfilters contains the code of the filters of the former cups-filters package as library functions to be used for the data format conversion tasks needed in Printer Applications. The cfGetPrinterAttributes5 function in libcupsfilters does not sanitize IPP attributes returned from an IPP server. When these IPP attributes are used, for instance, to generate a PPD file, this can lead to attacker controlled data to be provided to the rest of the CUPS system.

The cups-filters package contains back ends, filters, and other software that was once part of the core Common UNIX Printing System (CUPS) distribution but is now maintained independently.

Security Fix(es):

• cups-browsed: cups-browsed binds on UDP INADDR_ANY:631 trusting any packet from any source ()
• cups-filters: libcupsfilters: cfGetPrinterAttributes API does not perform sanitization on returned IPP attributes (CVE-2024-47076)
• cups: libppd: remote command injection via attacker controlled data in PPD file ()

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

The cups-filters package contains back ends, filters, and other software that was once part of the core Common UNIX Printing System (CUPS) distribution but is now maintained independently.

Security Fix(es):

• cups-browsed: cups-browsed binds on UDP INADDR_ANY:631 trusting any packet from any source ()
• cups-filters: libcupsfilters: cfGetPrinterAttributes API does not perform sanitization on returned IPP attributes (CVE-2024-47076)
• cups: libppd: remote command injection via attacker controlled data in PPD file ()

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

• CVE-2024-47076: cfGetPrinterAttributes5() Validate response attributes before return

The cfGetPrinterAttributes5 function in libcupsfilters does not sanitize IPP attributes returned from an IPP server. When these IPP attributes are used, for instance, to generate a PPD file, this can lead to attacker controlled data to be provided to the rest of the CUPS system. (CVE-2024-47076) The libppd function ppdCreatePPDFromIPP2 does not sanitize IPP attributes when creating the PPD buffer. When used in combination with other functions such as cfGetPrinterAttributes5, can result in user controlled input and ultimately code execution via Foomatic. This vulnerability can be part of an exploit chain leading to remote code execution (RCE), as described in CVE-2024-47176. (CVE-2024-47175) cups-browsed binds to INADDR_ANY:631, causing it to trust any packet from any source, and can cause the Get-Printer-Attributes IPP request to an attacker controlled URL. When combined with other vulnerabilities, such as CVE-2024-47076, CVE-2024-47175, and CVE-2024-47177, an attacker can execute arbitrary commands remotely on the target machine without authentication when a malicious printer is printed to. (CVE-2024-47176) Any value passed to FoomaticRIPCommandLine via a PPD file will be executed as a user controlled command. When combined with other logic bugs as described in CVE_2024-47176, this can lead to remote command execution. (CVE-2024-47177)

These are all security issues fixed in the cups-filters-1.28.17-5.1 package on the GA media of openSUSE Tumbleweed.

This update for cups-filters fixes the following issues:

Changes in cups-filters:

• CVE-2026-64611: Fixed Infinite-loop CPU-exhaustion DoS in cfIEEE1284NormalizeMakeModel on empty MDL field. A user who controls an IEEE-1284 device ID consumed by cfIEEE1284GetMakeModel can drive cfIEEE1284NormalizeMakeModel into an infinite loop. (bsc#1273145,GHSA-rcq7-rv5g-j3r4)

• CVE-2026-64612: Fixed Malformed PNG aborts CUPS image filter process (missing libpng setjmp recovery) A authenticated client that can submit an image print job can abort the CUPS filter process by supplying a malformed PNG. (bsc#1273146,GHSA-7mxj-cfq5-84ch)

• Provide cups-browsed as separated cups-filters-cups-browsed sub-package so users can uninstall this sub-package to completely avoid the generic security risk of cups-browsed. cups-browsed auto-creates local print queues for printers which are announced via DNS-SD. It is a generic security risk when a service (cups-browsed.service) accepts any (possibly malicious) incoming information from any host in the local network (i.e. any DNS-SD announcements) and from that information it auto-creates print queue configurations for CUPS (where its server program cupsd runs as root). For more information see the openSUSE support database article https://en.opensuse.org/SDB:CUPS_and_SANE_Firewall_settings

• Fixed a regression "Error about PPD file during 'driverless' printer setup" (boo#1256868) and "ppd pull out from [driverless] printer feature broken" (bsc#1256977)

• unbreak qpdf [bsc#1253678]

• CVE-2024-47176: Fixed cups-browsed binds to UDP INADDR_ANY:631 (bsc#1230939) and to avoid CVE-2024-47850 "cups-browsed can be abused to initiate remote DDoS against third-party targets" (bsc#1231294) by removing legacy CUPS Browsing support in cups-browsed (introduced 2012) which is no longer needed nowadays. CUPS browsing was removed from CUPS since version 1.6. Legacy CUPS Browsing is a generic security risk, see the section "Automated print queue setup via cups-browsed" in https://en.opensuse.org/SDB:CUPS_and_SANE_Firewall_settings

• CVE-2024-47076: Fixed lack of input sanitization in cfGetPrinterAttributes5 (bsc#1230937)

• CVE-2024-47175: Fixed lack of input sanitization in _ppdCreateFromIPP() (bsc#1230932)

• In general regarding CUPS and cups-browsed security issues see https://en.opensuse.org/SDB:CUPS_and_SANE_Firewall_settings

The cups-filters package contains back ends, filters, and other software that was once part of the core Common UNIX Printing System (CUPS) distribution but is now maintained independently.

Security Fix(es):

• cups-browsed: cups-browsed binds on UDP INADDR_ANY:631 trusting any packet from any source ()

• cups-filters: libcupsfilters: cfGetPrinterAttributes API does not perform sanitization on returned IPP attributes (CVE-2024-47076)

• cups: libppd: remote command injection via attacker controlled data in PPD file ()

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

The cups-filters package contains back ends, filters, and other software that was once part of the core Common UNIX Printing System (CUPS) distribution but is now maintained independently.

Security Fix(es):

• cups-browsed: cups-browsed binds on UDP INADDR_ANY:631 trusting any packet from any source ()

• cups-filters: libcupsfilters: cfGetPrinterAttributes API does not perform sanitization on returned IPP attributes (CVE-2024-47076)

• cups: libppd: remote command injection via attacker controlled data in PPD file ()

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

This update for cups-filters fixes the following issues:

• CVE-2024-47850: cups-browsed can be abused to initiate remote DDoS against third-party targets (bsc#1231294)
• CVE-2024-47076: Fixed lack of input sanitization in cfGetPrinterAttributes5 (bsc#1230937).

Simone Margaritelli discovered that the cups-filters cups-browsed component could be used to create arbitrary printers from outside the local network. In combination with issues in other printing components, a remote attacker could possibly use this issue to connect to a system, created manipulated PPD files, and execute arbitrary code when a printer is used. This update disables support for the legacy CUPS printer discovery protocol. (CVE-2024-47176)

Simone Margaritelli discovered that cups-filters incorrectly sanitized IPP data when creating PPD files. A remote attacker could possibly use this issue to manipulate PPD files and execute arbitrary code when a printer is used. (CVE-2024-47076)

USN-7043-1 fixed vulnerabilities in cups-filters. This update improves the fix for CVE-2024-47176 by removing support for the legacy CUPS printer discovery protocol entirely.

Original advisory details:

Simone Margaritelli discovered that the cups-filters cups-browsed component could be used to create arbitrary printers from outside the local network. In combination with issues in other printing components, a remote attacker could possibly use this issue to connect to a system, created manipulated PPD files, and execute arbitrary code when a printer is used. This update disables support for the legacy CUPS printer discovery protocol. (CVE-2024-47176)

Simone Margaritelli discovered that cups-filters incorrectly sanitized IPP data when creating PPD files. A remote attacker could possibly use this issue to manipulate PPD files and execute arbitrary code when a printer is used. (CVE-2024-47076)

Simone Margaritelli discovered that libcupsfilters incorrectly sanitized IPP data when creating PPD files. A remote attacker could possibly use this issue to manipulate PPD files and execute arbitrary code when a printer is used.