CVE-2025-3891
Mod_auth_openidc: dos via empty post in mod_auth_openidc with oidcpreservepost enabled
- Published
- Last modified
- Where the record stands: published, rejected by its publisher, or superseded by another id.What do these mean? →
- published
- Whether CISA lists it in its Known Exploited Vulnerabilities catalog: proof that attackers are using it.What do these mean? →
- Not listed in CISA KEV
- Fix
- Fixed in 2.4.13.1
- Whether working attack code is public (Exploit-DB, Metasploit, Nuclei or GitHub). Public code makes attacks easier.What do these mean? →
- None on Exploit-DB, Metasploit or GitHub
CISA's decision points: whether it is exploited, whether attacks can be automated, and how much control an attacker gets. Assessed (SSVC 2.0.3).What do these mean? →
- Exploitation: none
- Automatable: yes
- Technical impact: partial
Summary
A flaw was found in the mod_auth_openidc module for Apache httpd. This flaw allows a remote, unauthenticated attacker to trigger a denial of service by sending an empty POST request when the OIDCPreservePost directive is enabled. The server crashes consistently, affecting availability.
Timeline
- CVE published
- CISA SSVC assessment
Exploitation: none · Automatable: yes · Technical impact: partial
- Record last updated
Affected versions
- mod_auth_openidc
From 2.0.0 · fixed in 2.4.13.1
- mod_auth_openidc:2.3
Version range not reported
- mod_auth_openidc:2.3
Version range not reported
- mod_auth_openidc:2.3
Version range not reported
- mod_auth_openidc:2.3
Version range not reported
- mod_auth_openidc:2.3
Version range not reported
- mod_auth_openidc:2.3
Version range not reported
- mod_auth_openidc:2.3
Version range not reported
- mod_auth_openidc:2.3
Version range not reported
- mod_auth_openidc
Version range not reported
- mod_auth_openidc
Version range not reported
- mod_auth_openidc
Version range not reported
- mod_auth_openidc
Version range not reported
- mod_auth_openidc
Version range not reported
- mod_auth_openidc
Version range not reported