CVE-2012-1016: mit kerberos_5 NULL Pointer Dereference
Vulnerability summary
CVE-2012-1016 is a medium (CVSS 5.0) NULL Pointer Dereference vulnerability in mit kerberos_5. EPSS estimates a 2.58% chance of exploitation in the next 30 days, higher than 85.2% of scored vulnerabilities.
Not severe (CVSS 5, network access); no exploitation reported by the 5 checked sources
Source freshness unavailable
How is this decided?Advisory lineage
Upstream 0 · Downstream 3 · Related 2Timeline
- 03-03-2013PublishedVulnerability first disclosed.
- 06-08-2024Last modifiedVulnerability information updated.
Description
The pkinit_server_return_padata function in plugins/preauth/pkinit/pkinit_srv.c in the PKINIT implementation in the Key Distribution Center (KDC) in MIT Kerberos 5 (aka krb5) before 1.10.4 attempts to find an agility KDF identifier in inappropriate circumstances, which allows remote attackers to cause a denial of service (NULL pointer dereference and daemon crash) via a crafted Draft 9 request.
CVSS metrics
1 score · 1 source · 1 versionEPSS trend
Probability
2.58%
Chance of exploitation in the next 30 days
Percentile
85%
Versus all other CVEs
30-day change
No change 0.00 pp
From 2.58% on 04-10-2026
Known exploited
Compare KEV catalogs
CISA KEVNot in the CISA KEV catalog.
ENISA CNWNot in the ENISA CNW catalog.
CIRCLNot in the CIRCL catalog.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeAffected systems
Known conditions: network-reachable, no authentication (CVSS vector). Other conditions: not stated in public data.
Debian1 product
- krb5< 1.10.1+dfsg-4+nmu1
Mit1 product
- kerberos_5< 1.10.4
Ubuntu1 product
- krb5< 1.11.3+dfsg-3ubuntu2
3 vendors · 3 products
References
8 links- github.com/krb5/krb5/commit/db64ca25d661a47b996b4e2645998b5d7f0eb52cX Refsource CONFIRMPatchThird Party Advisory
