HOMEVULNERABILITIESCVE-2011-1527
HIGH

CVE-2011-1527

CWE-20Published: October 20, 2011· Updated: Jun 16, 2026

7.8
CVSS v3.1

Official Description

The kdb_ldap plugin in the Key Distribution Center (KDC) in MIT Kerberos 5 (aka krb5) 1.9 through 1.9.1, when the LDAP back end is used, allows remote attackers to cause a denial of service (NULL pointer dereference and daemon crash) via a kinit operation with incorrect string case for the realm, related to the is_principal_in_realm, krb5_set_error_message, krb5_ldap_get_principal, and process_as_req functions.

NVD Source

Technical Analysis

CVE-2011-1527 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

Exploitation requires some privileges, which limits the exposure to scenarios where an attacker has already gained initial access.

CVSS v3.1 Vector Breakdown

Exploitability
Attack VectorNetwork
Attack ComplexityLow
Privileges Req.
User Interaction
Scope
Impact
ConfidentialityNone
IntegrityNone
AvailabilityC
AV:N/AC:L/Au:N/C:N/I:N/A:C

Affected Vendors & Products

mit1 product(s)
kerberos 5
Source: NVD CPE · 2 total CPE entries

Exploit & PoC Resources

NO KNOWN EXPLOITNo public exploit confirmed at this time
Exploit-DB
Offensive Security exploit database
GitHub PoC Search
Community PoC repositories
Rapid7 / Metasploit
Metasploit module search
PacketStorm
Security advisories & exploits
NVD Detail
Official NIST entry
MITRE CVE
CVE Program entry
External links open in a new tab. Always verify in a controlled environment before use.

Official Patches & Advisories

ADVISORYhttp://web.mit.edu/kerberos/advisories/MITKRB5-SA-2011-006.txt
ADVISORYhttp://www.redhat.com/support/errata/RHSA-2011-1379.html
ADVISORYhttp://web.mit.edu/kerberos/advisories/MITKRB5-SA-2011-006.txt
ADVISORYhttp://www.redhat.com/support/errata/RHSA-2011-1379.html

All References (10)

→
http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=629558
→
http://web.mit.edu/kerberos/advisories/MITKRB5-SA-2011-006.txtVendor Advisory
→
http://www.kb.cert.org/vuls/id/659251US Government Resource
→
http://www.mandriva.com/security/advisories?name=MDVSA-2011:159
→
http://www.redhat.com/support/errata/RHSA-2011-1379.htmlVendor Advisory
→
http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=629558
→
http://web.mit.edu/kerberos/advisories/MITKRB5-SA-2011-006.txtVendor Advisory
→
http://www.kb.cert.org/vuls/id/659251US Government Resource
→
http://www.mandriva.com/security/advisories?name=MDVSA-2011:159
→
http://www.redhat.com/support/errata/RHSA-2011-1379.htmlVendor Advisory

Quick Facts

CVE IDCVE-2011-1527
CVSS Score7.8 / 10
SeverityHIGH
WeaknessCWE-20
CISA KEVNo
Affected1 vendor(s)
PublishedOct 20, 2011

Related CVEs (CWE-20)

CVE-2012-3026
10.0
CVE-2012-6392
10.0
CVE-2012-3010
10.0
CVE-2012-4176
10.0
CVE-2012-3021
10.0
CVE-2012-4704
10.0

Recommended Actions

  • →Apply vendor patches immediately
  • →Monitor CVE-2011-1527 in threat intel feeds
  • →Review IDS/IPS signatures for exploitation attempts
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWATCH.COM. CVE data is provided under the NVD usage policy.
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