MIT Kerberos 5-1.10/5-1.10.1/5-1.10.2/5-1.10.3/5-1.11 pkinit_crypto_openssl.c pkinit_check_kdc_pkid null pointer dereference

CVSS Meta Temp Score
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6.7$0-$5k0.00

Summaryinfo

A vulnerability, which was classified as problematic, was found in MIT Kerberos 5-1.10/5-1.10.1/5-1.10.2/5-1.10.3/5-1.11. The impacted element is the function pkinit_check_kdc_pkid of the file src/plugins/preauth/pkinit/pkinit_crypto_openssl.c. Executing a manipulation can lead to null pointer dereference. This vulnerability appears as CVE-2013-1415. In addition, an exploit is available. You should upgrade the affected component.

Detailsinfo

A vulnerability was found in MIT Kerberos 5-1.10/5-1.10.1/5-1.10.2/5-1.10.3/5-1.11 (Network Authentication Software). It has been declared as critical. This vulnerability affects the function pkinit_check_kdc_pkid of the file src/plugins/preauth/pkinit/pkinit_crypto_openssl.c. The manipulation with an unknown input leads to a null pointer dereference vulnerability. The CWE definition for the vulnerability is CWE-476. A NULL pointer dereference occurs when the application dereferences a pointer that it expects to be valid, but is NULL, typically causing a crash or exit. As an impact it is known to affect availability. CVE summarizes:

The pkinit_check_kdc_pkid function in plugins/preauth/pkinit/pkinit_crypto_openssl.c in the PKINIT implementation in the Key Distribution Center (KDC) in MIT Kerberos 5 (aka krb5) before 1.10.4 and 1.11.x before 1.11.1 does not properly handle errors during extraction of fields from an X.509 certificate, which allows remote attackers to cause a denial of service (NULL pointer dereference and daemon crash) via a malformed KRB5_PADATA_PK_AS_REQ AS-REQ request.

The weakness was presented 02/15/2013 as 7570 as confirmed bug report (Website). The advisory is shared for download at krbdev.mit.edu. The public release was coordinated in cooperation with the vendor. This vulnerability was named CVE-2013-1415 since 01/24/2013. The attack can be initiated remotely. No form of authentication is required for a successful exploitation. Technical details and also a private exploit are known.

It is declared as proof-of-concept. The vulnerability scanner Nessus provides a plugin with the ID 64860 (FreeBSD : krb5 -- NULL pointer dereference in the KDC PKINIT code [CVE-2013-1415] (f54584bc-7d2b-11e2-9bd1-206a8a720317)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family FreeBSD Local Security Checks. The commercial vulnerability scanner Qualys is able to test this issue with plugin 195579 (Ubuntu Security Notification for Krb5 Vulnerabilities (USN-2310-1)).

Upgrading to version 1.10.4 eliminates this vulnerability. Applying a patch is able to eliminate this problem. The bugfix is ready for download at github.com. The best possible mitigation is suggested to be upgrading to the latest version. A possible mitigation has been published 4 days after the disclosure of the vulnerability. Furthermore it is possible to detect and prevent this kind of attack with TippingPoint and the filter 25998.

The vulnerability is also documented in the databases at X-Force (82331), Tenable (64860), SecurityFocus (BID 58144†), OSVDB (90609†) and Secunia (SA52390†). See VDB-7884, VDB-8455, VDB-67256 and VDB-64211 for similar entries. Once again VulDB remains the best source for vulnerability data.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.5
VulDB Meta Temp Score: 6.7

VulDB Base Score: 7.5
VulDB Temp Score: 6.7
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Null pointer dereference
CWE: CWE-476 / CWE-404
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Access: Private
Status: Proof-of-Concept

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 64860
Nessus Name: FreeBSD : krb5 -- NULL pointer dereference in the KDC PKINIT code [CVE-2013-1415] (f54584bc-7d2b-11e2-9bd1-206a8a720317)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Port: 🔍

OpenVAS ID: 881692
OpenVAS Name: CentOS Update for krb5-devel CESA-2013:0656 centos6
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

Reaction Time: 🔍
0-Day Time: 🔍
Exposure Time: 🔍

Upgrade: Kerberos 1.10.4
Patch: github.com
TippingPoint: 🔍

McAfee IPS: 🔍
McAfee IPS Version: 🔍

ISS Proventia IPS: 🔍
Fortigate IPS: 🔍

Timelineinfo

01/24/2013 🔍
02/15/2013 +22 days 🔍
02/19/2013 +4 days 🔍
02/19/2013 +0 days 🔍
02/22/2013 +3 days 🔍
02/24/2013 +2 days 🔍
02/25/2013 +1 days 🔍
02/25/2013 +0 days 🔍
02/27/2013 +2 days 🔍
03/05/2013 +6 days 🔍
03/24/2013 +19 days 🔍
05/05/2021 +2964 days 🔍

Sourcesinfo

Vendor: mit.edu

Advisory: 7570
Status: Confirmed
Confirmation: 🔍
Coordinated: 🔍

CVE: CVE-2013-1415 (🔍)
GCVE (CVE): GCVE-0-2013-1415
GCVE (VulDB): GCVE-100-7828

OVAL: 🔍

X-Force: 82331
SecurityFocus: 58144 - MIT Kerberos 5 CVE-2013-1415 NULL Pointer Dereference Denial of Service Vulnerability
Secunia: 52390 - Kerberos KDC PKINIT NULL-Pointer Dereference Denial of Service Vulnerabilities, Less Critical
OSVDB: 90609
SecurityTracker: 1028204 - Kerberos Null Pointer Dereference in KDC PKINIT Code Lets Remote Users Execute Arbitrary Code
Vulnerability Center: 38892 - MIT Kerberos 5 <1.10.4 KDC Null Pointer Dereference via a Crafted KRB5_PADATA_PK_AS_REQ AS-REQ, Low

scip Labs: https://www.scip.ch/en/?labs.20161013
See also: 🔍

Entryinfo

Created: 02/27/2013 10:34
Updated: 05/05/2021 14:56
Changes: 02/27/2013 10:34 (90), 04/26/2017 17:44 (10), 05/05/2021 14:56 (3)
Complete: 🔍
Committer: olku
Cache ID: 216:318:103

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