MIT Kerberos 1.10.6/1.11.3 Multi-Realm KDC kdc/main.c setup_server_realm null pointer dereference

CVSS Meta Temp Score
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CTI Interest Score
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7.2$0-$5k0.00

Summaryinfo

A vulnerability was found in MIT Kerberos 1.10.6/1.11.3 and classified as problematic. The impacted element is the function setup_server_realm of the file kdc/main.c of the component Multi-Realm KDC Handler. The manipulation results in null pointer dereference. This vulnerability is identified as CVE-2013-1418. There is not any exploit available. A patch should be applied to remediate this issue.

Detailsinfo

A vulnerability classified as critical has been found in MIT Kerberos 1.10.6/1.11.3 (Network Authentication Software). Affected is the function setup_server_realm of the file kdc/main.c of the component Multi-Realm KDC Handler. The manipulation with an unknown input leads to a null pointer dereference vulnerability. CWE is classifying the issue as 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. This is going to have an impact on availability. CVE summarizes:

The setup_server_realm function in main.c in the Key Distribution Center (KDC) in MIT Kerberos 5 (aka krb5) before 1.10.7, when multiple realms are configured, allows remote attackers to cause a denial of service (NULL pointer dereference and daemon crash) via a crafted request.

The weakness was released 11/04/2013 by Tom Yu as Ticket #7757 (Website). The advisory is available at krbdev.mit.edu. This vulnerability is traded as CVE-2013-1418 since 01/24/2013. It is possible to launch the attack remotely. The exploitation doesn't require any form of authentication. Technical details are known, but there is no available exploit.

The vulnerability scanner Nessus provides a plugin with the ID 75208 (openSUSE Security Update : krb5 (openSUSE-SU-2013:1738-1)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family SuSE Local Security Checks. The commercial vulnerability scanner Qualys is able to test this issue with plugin 350283 (Amazon Linux Security Advisory for krb5: ALAS-2014-443).

Applying a patch is able to eliminate this problem. A possible mitigation has been published immediately after the disclosure of the vulnerability. Furthermore it is possible to detect and prevent this kind of attack with TippingPoint and the filter 13032.

The vulnerability is also documented in the databases at X-Force (88565), Tenable (75208), SecurityFocus (BID 63555†), OSVDB (99508†) and Secunia (SA55588†). Entries connected to this vulnerability are available at VDB-11229, VDB-11249, VDB-67257 and VDB-67306. If you want to get best quality of vulnerability data, you may have to visit VulDB.

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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: 7.2

VulDB Base Score: 7.5
VulDB Temp Score: 7.2
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

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VulDB Base Score: 🔍
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Exploitinginfo

Class: Null pointer dereference
CWE: CWE-476 / CWE-404
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: 75208
Nessus Name: openSUSE Security Update : krb5 (openSUSE-SU-2013:1738-1)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Port: 🔍

OpenVAS ID: 867099
OpenVAS Name: Fedora Update for krb5 FEDORA-2013-21786
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Patch
Status: 🔍

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

McAfee IPS: 🔍
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ISS Proventia IPS: 🔍
Fortigate IPS: 🔍

Timelineinfo

01/24/2013 🔍
11/04/2013 +284 days 🔍
11/04/2013 +0 days 🔍
11/04/2013 +0 days 🔍
11/13/2013 +9 days 🔍
11/17/2013 +4 days 🔍
11/26/2013 +9 days 🔍
06/13/2014 +199 days 🔍
06/01/2021 +2545 days 🔍

Sourcesinfo

Vendor: mit.edu

Advisory: Ticket #7757
Researcher: Tom Yu
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2013-1418 (🔍)
GCVE (CVE): GCVE-0-2013-1418
GCVE (VulDB): GCVE-100-11106

OVAL: 🔍
IAVM: 🔍

X-Force: 88565
SecurityFocus: 63555
Secunia: 55588 - Kerberos Multi-realm KDC NULL Pointer Dereference Denial of Service Vulnerability, Less Critical
OSVDB: 99508
Vulnerability Center: 42376 - MIT Kerberos 5 Prior to 1.10.7 Remote Denial of Service When Multiple Realms are Configured, Medium

See also: 🔍

Entryinfo

Created: 11/13/2013 16:46
Updated: 06/01/2021 20:27
Changes: 11/13/2013 16:46 (85), 05/15/2017 12:03 (5), 06/01/2021 20:27 (3)
Complete: 🔍
Cache ID: 216:CC3:103

If you want to get best quality of vulnerability data, you may have to visit VulDB.

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