Description
The cupsDoAuthentication function in auth.c in the client in CUPS before 1.4.4, when HAVE_GSSAPI is omitted, does not properly handle a demand for authorization, which allows remote CUPS servers to cause a denial of service (infinite loop) via HTTP_UNAUTHORIZED responses.
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | cups | 1.4.4-1 | — |
| Debian 13 | cups | 1.4.4-1 | — |
| Debian 12 | cups | 1.4.4-1 | — |
| Debian 5.0 | cups | 1.3.8-1+lenny9 | DSA-2176-1 |
Advisories 1
- DSA-2176-1 cups - several Debian Security (DSA / DLA) · Mar 9, 2026
References
- http://cups.org/str.php?L3518
- http://cups.org/articles.php?L596
- DSA-2176 vendor-advisory
- GLSA-201207-10 vendor-advisory
- MDVSA-2011:146 vendor-advisory
- ADV-2011-0535 vdb-entry
- 43521 third-party-advisory