CVE-2024-47850

This project provides backends, filters, and other software that was once part of the core CUPS distribution but is no longer maintained by Apple Inc. In addition it contains additional filters and software developed independently of Apple, especially filters for the PDF-centric printing workflow introduced by OpenPrinting and a daemon to browse Bonjour broadcasts of remote CUPS printers to make these printers available locally and to provide backward compatibility to the old CUPS broadcasting and browsing of CUPS 1.5.x and older.

Security Fix(es):

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.(CVE-2024-47076)

CUPS is a standards-based, open-source printing system, and libppd can be used for legacy PPD file support. 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 is a standards-based, open-source printing system, and cups-browsed contains network printing functionality including, but not limited to, auto-discovering print services and shared printers. 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)

CUPS cups-browsed before 2.5b1 will send an HTTP POST request to an arbitrary destination and port in response to a single IPP UDP packet requesting a printer to be added, a different vulnerability than CVE-2024-47176. (The request is meant to probe the new printer but can be used to create DDoS amplification attacks.)(CVE-2024-47850)

CUPS cups-browsed before 2.5b1 will send an HTTP POST request to an arbitrary destination and port in response to a single IPP UDP packet requesting a printer to be added, a different vulnerability than CVE-2024-47176. (The request is meant to probe the new printer but can be used to create DDoS amplification attacks.)

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.

CUPS cups-browsed before 2.5b1 will send an HTTP POST request to an arbitrary destination and port in response to a single IPP UDP packet requesting a printer to be added, a different vulnerability than CVE-2024-47176. (The request is meant to probe the new printer but can be used to create DDoS amplification attacks.)

• CVE-2024-47175: prevent PPD generation based on invalid IPP response
• CVE-2024-47850: do not generate PPD for remote raw queues and add system-cups.slice

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

This update for cups-filters fixes the following issues:

• CVE-2024-47176: cups-browsed binds on UDP port 631 and trusts packets that try to trigger a Get-Printer-Attributes IPP request. (bsc#1230939)
• CVE-2024-47850: cups-browsed can be abused to initiate remote DDoS against third-party targets (bsc#1231294)

The fix is disabling the CUPS protocol in cups-browsed.

This update for cups-filters fixes the following issues:

• cups-browsed would bind on UDP INADDR_ANY:631 and trust any packet from any source to trigger a Get-Printer-Attributes IPP request to an attacker controlled URL. This patch removes support for the legacy CUPS and LDAP protocols, the previous patch fix for this issue was incomplete (bsc#1230939, bsc#1231294, CVE-2024-47176, CVE-2024-47850)

This update for cups-filters fixes the following issues:

• CVE-2024-47850: Fixed cups-browsed can be abused to initiate remote DDoS against third-party targets (bsc#1231294)

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).