Commits on Oct 3, 2024

1. CVE: detect and mitigate cups foomatic-rip CVE-2024-47176 2024-47177 …

   https://www.cve.org/CVERecord?id=CVE-2024-47177
   GHSA-rj88-6mr5-rcw8
   https://www.evilsocket.net/2024/09/26/Attacking-UNIX-systems-via-CUPS-Part-I/
   
   In Summary there are four vulnerabilities:
   
   "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."
   
   The commands are executed through foomatic-rip binary, to detect such
   executions run the following filter on tetragon JSON events:
   
     jq 'select(.process_exec != null) | \
        select(.process_exec.parent.binary | contains("foomatic-rip"))' \
        /var/log/tetragon/tetragon.log
   
   This policy can detect and block foomatic-rip binary from executing
   commands, however according to CUPS developers:
   "...we can certainly recommend that people not use Foomatic, but there are likely
    hundreds of older printer models (before 2010) that are only supported through
    Foomatic."
   
   Signed-off-by: Djalal Harouni <[email protected]>

   

   tixxdz committed Oct 3, 2024
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