CVE-2015-2694
Description
The kdcpreauth modules in MIT Kerberos 5 (aka krb5) 1.12.x and 1.13.x before 1.13.2 do not properly track whether a client's request has been validated, which allows remote attackers to bypass an intended preauthentication requirement by providing (1) zero bytes of data or (2) an arbitrary realm name, related to plugins/preauth/otp/main.c and plugins/preauth/pkinit/pkinit_srv.c.
Predictions
Heuristic predictions, AS-IS, for prioritization only.
Mitigations
No mitigations published for this CVE yet.
The vendor-content worker queues fetches as references arrive (check back in a few minutes). Or — if you've already worked around this in production — publish your fix to the community-verified tier.
✚ Propose a mitigation on Community → Mitigations published via the community go through AI scoring + 2 human reviewers + 7-day silent objection window before landing here withsource_tier=community-verified.
OS impact
| OS | Version | Status | Fixed in |
|---|---|---|---|
| debian | bookworm | fixed | 1.12.1+dfsg-20 |
| debian | bullseye | fixed | 1.12.1+dfsg-20 |
| debian | forky | fixed | 1.12.1+dfsg-20 |
| debian | sid | fixed | 1.12.1+dfsg-20 |
| debian | trixie | fixed | 1.12.1+dfsg-20 |
Application impact
| Vendor | Product | Versions | Fixed |
|---|---|---|---|
| mit | kerberos_5 | 1.12 | |
| mit | kerberos_5 | 1.12.1 | |
| mit | kerberos_5 | 1.12.2 | |
| mit | kerberos_5 | 1.12.3 | |
| mit | kerberos_5 | 1.13 | |
| mit | kerberos_5 | 1.13.1 | |
References
- http://krbdev.mit.edu/rt/Ticket/Display.html?id=8160
- http://www.oracle.com/technetwork/topics/security/linuxbulletinoct2015-2719645.html
- http://www.securityfocus.com/bid/74824
- http://www.ubuntu.com/usn/USN-2810-1
- https://github.com/krb5/krb5/commit/e3b5a5e5267818c97750b266df50b6a3d4649604
- https://security-tracker.debian.org/tracker/CVE-2015-2694
CWEs
CWE-264
Community-verified mitigations for this CVE will appear above when contributors publish them.
Verify integrity in audit chain (admin only). AS-IS.