MIT Kerberos 5-1.9/5-1.9.1 Key Distribution Center input validation

CVSS Meta Temp Score
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CTI Interest Score
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7.5$0-$5k0.00

Summaryinfo

A vulnerability described as problematic has been identified in MIT Kerberos 5-1.9/5-1.9.1. The impacted element is an unknown function of the component Key Distribution Center. Executing a manipulation can lead to input validation. This vulnerability is handled as CVE-2011-1527. There is not any exploit available.

Detailsinfo

A vulnerability classified as critical was found in MIT Kerberos 5-1.9/5-1.9.1 (Network Authentication Software). This vulnerability affects an unknown code block of the component Key Distribution Center. The manipulation with an unknown input leads to a input validation vulnerability. The CWE definition for the vulnerability is CWE-20. The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly. As an impact it is known to affect availability. CVE summarizes:

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.

The weakness was released 10/20/2011 as confirmed advisory (CERT.org). The advisory is shared for download at kb.cert.org. This vulnerability was named CVE-2011-1527. The exploitation appears to be easy. The attack can be initiated remotely. No form of authentication is required for a successful exploitation. There are neither technical details nor an exploit publicly available. The current price for an exploit might be approx. USD $0-$5k (estimation calculated on 08/04/2024).

The vulnerability scanner Nessus provides a plugin with the ID 68372 (Oracle Linux 6 : krb5 (ELSA-2011-1379)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Oracle Linux Local Security Checks. The commercial vulnerability scanner Qualys is able to test this issue with plugin 195242 (Ubuntu Security Notification for Krb5 Vulnerabilities (USN-1233-1)).

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

The vulnerability is also documented in the databases at X-Force (70749), Tenable (68372), SecurityFocus (BID 50273†) and Vulnerability Center (SBV-33676†). Entries connected to this vulnerability are available at VDB-59179, VDB-59178 and VDB-59177. VulDB is the best source for vulnerability data and more expert information about this specific topic.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
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CVSSv3info

VulDB Meta Base Score: 7.5
VulDB Meta Temp Score: 7.5

VulDB Base Score: 7.5
VulDB Temp Score: 7.5
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

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VulDB Base Score: 🔍
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Exploitinginfo

Class: Input validation
CWE: CWE-20
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 68372
Nessus Name: Oracle Linux 6 : krb5 (ELSA-2011-1379)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Port: 🔍

OpenVAS ID: 863620
OpenVAS Name: Fedora Update for krb5 FEDORA-2011-14650
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

Interest: 🔍
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Active APT Groups: 🔍

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔍
McAfee IPS: 🔍
McAfee IPS Version: 🔍

ISS Proventia IPS: 🔍
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Timelineinfo

03/29/2011 🔍
10/19/2011 +204 days 🔍
10/20/2011 +1 days 🔍
10/20/2011 +0 days 🔍
10/20/2011 +0 days 🔍
10/31/2011 +11 days 🔍
07/12/2013 +620 days 🔍
03/23/2015 +619 days 🔍
08/04/2024 +3422 days 🔍

Sourcesinfo

Vendor: mit.edu

Advisory: RHSA-2011:1379
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2011-1527 (🔍)
GCVE (CVE): GCVE-0-2011-1527
GCVE (VulDB): GCVE-100-59176

OVAL: 🔍

CERT: 🔍
X-Force: 70749
SecurityFocus: 50273 - MIT Kerberos Multiple Denial of Service Vulnerabilities
Vulnerability Center: 33676 - MIT Kerberos 5 1.9-1.91 KDC\x27s LDAP Plugin Remote DoS Vulnerability via a Kinit Operation, High

See also: 🔍

Entryinfo

Created: 03/23/2015 16:50
Updated: 08/04/2024 05:42
Changes: 03/23/2015 16:50 (66), 04/04/2017 11:32 (11), 11/24/2021 14:30 (5), 11/24/2021 14:32 (1), 08/04/2024 05:42 (16)
Complete: 🔍
Cache ID: 216:DE9:103

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