CVE-2011-1530

The process_tgs_req function in do_tgs_req.c in the Key Distribution Center (KDC) in MIT Kerberos 5 (aka krb5) 1.9 through 1.9.2 allows remote authenticated users to cause a denial of service (NULL pointer dereference and daemon crash) via a crafted TGS request that triggers an error other than the KRB5_KDB_NOENTRY error.

Published: 2011-12-08 Last update: 2026-06-16 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2011-1530 is rated Moderate Risk (57.6/100): CVSS Medium severity, with medium exploitation likelihood (EPSS 2.47%). EPSS rose +1.59% over the last day, indicating growing attacker interest. Review affected assets and schedule remediation.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2011-1530

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-06-15 0.88% 2.47% +1.59%
2 2025-03-30 1.45% 0.88% -0.57%
3 2025-03-29 — 1.45% —

Full EPSS history (9 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2011-1530

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
6.8 2.0 MEDIUM
AV:N/AC:L/Au:S/C:N/I:N/A:C Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:L)
Exploitation conditions are straightforward and predictable.
Authentication (AU:S)
A single authentication is required.
Confidentiality impact (C:N)
No confidentiality impact.
Integrity impact (I:N)
No integrity impact.
Availability impact (A:C)
Complete availability impact.
 8.0 6.9 [email protected]

Weakness enumeration for CVE-2011-1530

OS Trackers for CVE-2011-1530

vendor priority summary link
debian not yet assigned CVE-2011-1530 not yet assigned priority: Debian including 1 source packages (krb5), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 5. https://security-tracker.debian.org/tracker/CVE-2011-1530
gentoo high CVE-2011-1530: 1 GLSA(s) (201201-13), 1 atom(s) (app-crypt/mit-krb5); latest impact high. https://bugs.gentoo.org/buglist.cgi?quicksearch=CVE-2011-1530
redhat medium — https://access.redhat.com/security/cve/CVE-2011-1530
suse medium CVE-2011-1530 severity moderate: SUSE including 78 source package names (krb5-1.12.1-19.1, krb5-1.12.1-6.3, …), 125 product×package rows across 27 product lines (SUSE Linux Enterprise Desktop 12, SUSE Linux Enterprise Desktop 12 SP1, … (27 product lines)): Fixed 125. https://www.suse.com/security/cve/CVE-2011-1530/
ubuntu medium CVE-2011-1530 medium priority: Ubuntu including 1 source packages (krb5), 6 status rows across 6 suites (hardy, lucid, maverick, natty, oneiric, upstream): not-affected 4, released 2. https://ubuntu.com/security/CVE-2011-1530

Affected software / configurations for CVE-2011-1530

Vendor Product Version Raw CPE
mit mit_kerberos 5.1.9 cpe:2.3:a:mit:mit_kerberos:5.1.9:*:*:*:*:*:*:*
mit mit_kerberos 5.1.9.1 cpe:2.3:a:mit:mit_kerberos:5.1.9.1:*:*:*:*:*:*:*
mit mit_kerberos 5.1.9.2 cpe:2.3:a:mit:mit_kerberos:5.1.9.2:*:*:*:*:*:*:*

References for CVE-2011-1530

cvelogic Threat Intelligence