CVE-2024-47176: cups-browsed binds to `INADDR_ANY:631`, trusting any packet from any source

CVE-2024-47076CUPS 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-2024-47175CUPS 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-2024-47176CUPS 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 INADDRANY:631, causing it to trust any packet from any source, and can cause the Get-Printer-Attributes IPP request to an attacker controlled URL. Due to the service binding to :631 ( INADDRANY ), multiple bugs in cups-browsed can be exploited in sequence to introduce a malicious printer to the system. This chain of exploits ultimately enables an attacker to execute arbitrary commands remotely on the target machine without authentication when a print job is started. This poses a significant security risk over the network. Notably, this vulnerability is particularly concerning as it can be exploited from the public internet, potentially exposing a vast number of systems to remote attacks if their CUPS services are enabled.CVE-2024-47177CUPS is a standards-based, open-source printing system, and cups-filters provides backends, filters, and other software for CUPS 2.x to use on non-Mac OS systems. 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 CVE2024-47176, this can lead to remote command execution.

— F5

OpenPrinting cups-browsed could allow a remote attacker to obtain sensitive information, caused by the binding on UDP INADDRANY:631 and trusting any packet from any source by the cups-browsed service. By sending a Get-Printer-Attributes IPP request, an attacker could exploit this vulnerability to obtain sensitive information and execute arbitrary code on the system.

— IBM

The cups-browsed component is responsible for discovering printers on a network and adding them to the system. In order to do so, the service uses two distinct protocols. For the first one, the service binds on all interfaces on UDP port 631 and accepts a custom packet from any untrusted source. This is exploitable from outside the LAN if the computer is exposed on the public internet. The service also listens for DNS-SD / mDNS advertisements trough AVAHI. n both cases, when a printer is discovered by either the UDP packet or mDNS, its IPP or IPPS url is automatically contacted by cups-browsed and a Get-Printer-Attributes request is sent to it. Among other things, this leaks its kernel version via User-Agent header.

— Red Hat

This CVE was automatically created from a reference found in an email or other text. If you are reading this, then this CVE entry is probably erroneous, since this text should be replaced by the official CVE description automatically.

— Launchpad