VDB-15655 · CVE-2000-0546 · BID 1338

MIT Kerberos 4.0/5 1.0/5 1.1/5 1.1.1 set_tgtkey lastrealm denial of service

CVSS Meta Temp Score CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.	Current Exploit Price (≈) Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.	CTI Interest Score Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
5.1	$0-$5k	0.00

Summaryinfo

A vulnerability has been found in MIT Kerberos 4.0/5 1.0/5 1.1/5 1.1.1 and classified as critical. This affects the function set_tgtkey. This manipulation of the argument lastrealm causes denial of service. This vulnerability is registered as CVE-2000-0546. No exploit is available. The affected component should be upgraded.

Detailsinfo

A vulnerability has been found in MIT Kerberos 4.0/5 1.0/5 1.1/5 1.1.1 (Network Authentication Software) and classified as critical. Affected by this vulnerability is the function set_tgtkey. The manipulation of the argument lastrealm with an unknown input leads to a denial of service vulnerability. The CWE definition for the vulnerability is CWE-404. The product does not release or incorrectly releases a resource before it is made available for re-use. As an impact it is known to affect availability. The summary by CVE is:

Buffer overflow in Kerberos 4 KDC program allows remote attackers to cause a denial of service via the lastrealm variable in the set_tgtkey function.

The weakness was published 06/09/2000 by Tom Yu (FIRST) as confirmed advisory (CERT.org). It is possible to read the advisory at cert.org. This vulnerability is known as CVE-2000-0546. The exploitation appears to be easy. The attack can be launched remotely. The exploitation doesn't need any form of authentication. Technical details of the vulnerability are known, but there is no available exploit.

Upgrading eliminates this vulnerability.

The vulnerability is also documented in the vulnerability database at SecurityFocus (BID 1338†). Similar entries are available at VDB-15656, VDB-15657, VDB-15658 and VDB-15659. Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

Type

Network Authentication Software

Vendor

Name

Kerberos

Version

License

open-source

Website

Vendor: http://www.mit.edu/

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.3
VulDB Meta Temp Score: 5.1

VulDB Base Score: 5.3
VulDB Temp Score: 5.1
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

AV	AC	Au	C	I	A
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳

Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Denial of service
CWE: CWE-404
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

0-Day	Unlock	Unlock	Unlock	Unlock
Today	Unlock	Unlock	Unlock	Unlock

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Timelineinfo

06/09/2000 🔍
06/09/2000 +0 days 🔍
06/09/2000 +0 days 🔍
06/25/2014 +5129 days 🔍
05/26/2018 +1431 days 🔍

Sourcesinfo

Vendor: mit.edu

Advisory: cert.org
Researcher: Tom Yu (FIRST)
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2000-0546 (🔍)
GCVE (CVE): GCVE-0-2000-0546
GCVE (VulDB): GCVE-100-15655
SecurityFocus: 1338 - Kerberos4 KDC AUTH_MSG_KDC_REQUEST NULL termination Vulnerability

See also: 🔍

Entryinfo

Created: 06/25/2014 11:22
Updated: 05/26/2018 07:55
Changes: 06/25/2014 11:22 (57), 05/26/2018 07:55 (1)
Complete: 🔍
Cache ID: 216::103