Vulnerability Description
RRD::CGI::Image versions through 0.01 for Perl pass CGI query parameters containting "tz" to tzset(), , so a FIFO or device path blocks the CGI process. The normalize_params method sends any query key matching /tz/i to tz(), which sets $ENV{TZ} to that value, with no validation. It then calls tzset(). glibc treats a TZ value starting with / or : as a file path and opens it, so a value naming a FIFO or a blocking device stalls the process inside tzset().
Related Weaknesses (CWE)
References
- https://man7.org/linux/man-pages/man3/tzset.3.html
- https://rt.cpan.org/Ticket/Display.html?id=182627
- https://security.metacpan.org/patches/R/RRD-CGI-Image/0.01/CVE-2026-123776-r1.pa
- http://www.openwall.com/lists/oss-security/2026/11/07/11
FAQ
What is CVE-2026-123776?
CVE-2026-123776 is a documented vulnerability. RRD::CGI::Image versions through 0.01 for Perl pass CGI query parameters containting "tz" to tzset(), , so a FIFO or device path blocks the CGI process. The normalize_params method sends any query ke...
How severe is CVE-2026-123776?
CVSS scoring is not yet available for CVE-2026-123776. Check NVD for updates.
Is there a patch for CVE-2026-123776?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.