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CVE-2011-1529

25
FAUCET Score

CVE-2011-1529 describes a denial-of-service vulnerability in MIT Kerberos 5 versions 1.8 through 1.8.4 and 1.9 through 1.9.1. Specifically, the lookup_lockout_policy function in the Key Distribution Center (KDC) can be exploited via a NULL pointer dereference, leading to a daemon crash when using db2 or LDAP backends. This vulnerability has a CVSS score of 7.8, indicating high severity due to its network-based attack vector, low attack complexity, and complete availability impact. There is no evidence of active exploitation, publicly available exploit code, or significant community discussion surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
1.8CPE matchmatch criteria
cpe:2.3:a:mit:kerberos_5:1.8:*:*:*:*:*:*:*
1.8.1CPE matchmatch criteria
cpe:2.3:a:mit:kerberos_5:1.8.1:*:*:*:*:*:*:*
1.8.2CPE matchmatch criteria
cpe:2.3:a:mit:kerberos_5:1.8.2:*:*:*:*:*:*:*
1.8.3CPE matchmatch criteria
cpe:2.3:a:mit:kerberos_5:1.8.3:*:*:*:*:*:*:*
1.8.4CPE matchmatch criteria
cpe:2.3:a:mit:kerberos_5:1.8.4:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 2.0

7.8HIGH

AV:N/AC:L/Au:N/C:N/I:N/A:C

Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
COMPLETE
Access Vector
NETWORK
Access Complexity
LOW
Authentication
NONE
Exploitability Score
10.0
Impact Score
6.9
CvssVersion
2.0

Exploit Intelligence

EPSS Score
4.05%
Probability of exploitation in next 30 days
EPSS Percentile
89.6%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0405 is in the 82nd percentile among its peer group of 51,506 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (1)

redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 6Fixed in: krb5-0:1.9-9.el6_1.2
View patch

Vendor Advisories (1)

redhatCVE-2011-1529Moderate

krb5: KDC denial of service vulnerabilities (MITKRB5-SA-2011-006)

Oct 18, 2011

References

lists.opensuse.org / opensuse-security-announce/2011-10/msg00009.html
web.mit.edu / kerberos/advisories/MITKRB5-SA-2011-006.txt
Vendor Advisory
kb.cert.org / vuls/id/659251
US Government Resource
mandriva.com / security/advisories
mandriva.com / security/advisories
redhat.com / support/errata/RHSA-2011-1379.html
Vendor Advisory