MIT Kerberos 4.0/5 improper authentication

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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A vulnerability was found in MIT Kerberos 4.0/5 (Network Authentication Software). It has been rated as problematic. Affected by this issue is an unknown code. The manipulation with an unknown input leads to a weak authentication vulnerability. Using CWE to declare the problem leads to CWE-287. Impacted is confidentiality, integrity, and availability. CVE summarizes:

kerberos 4 key servers allow a user to masquerade as another by breaking and generating session keys.

The weakness was shared 02/21/1996 by Mudge with @stake. This vulnerability is handled as CVE-1999-0143. The exploitation is known to be easy. The attack needs to be approached locally. No form of authentication is required for 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 05/08/2019). This vulnerability has a historic impact due to its background and reception.

Upgrading eliminates this vulnerability.

The vulnerability is also documented in the databases at SecurityFocus (BID 2351), X-Force (64) and Vulnerability Center (SBV-637).


  • Sun Solaris 2.3/2.4





CPE 2.3infoedit

CPE 2.2infoedit


VulDB Meta Base Score: 5.9
VulDB Meta Temp Score: 5.7

VulDB Base Score: 5.9
VulDB Temp Score: 5.7
VulDB Vector: 🔍
VulDB Reliability: 🔍



VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍


Class: Weak authentication
CWE: CWE-287
ATT&CK: Unknown

Local: Yes
Remote: No

Availability: 🔍
Status: Not defined

Price Prediction: 🔍
Current Price Estimation: 🔍


Threat Intelligenceinfoedit

Threat: 🔍
Adversaries: 🔍
Geopolitics: 🔍
Economy: 🔍
Predictions: 🔍
Remediation: 🔍


Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍


02/21/1996 🔍
02/21/1996 +0 days 🔍
02/21/1996 +0 days 🔍
11/22/1996 +275 days 🔍
01/05/2003 +2235 days 🔍
02/11/2007 +1498 days 🔍
06/17/2014 +2683 days 🔍
05/08/2019 +1785 days 🔍



Researcher: Mudge
Organization: @stake
Status: Not defined

CVE: CVE-1999-0143 (🔍)
SecurityFocus: 2351 - Kerberos 4 Valid Username and Realm Disclosure Vulnerability
X-Force: 64
Vulnerability Center: 637 - Kerberos 4 key servers allow a user to masquerade as another, Low


Created: 06/17/2014 04:51 PM
Updated: 05/08/2019 12:09 AM
Changes: (4) advisory_person_nickname advisory_company_name source_securityfocus_date source_securityfocus_class
Complete: 🔍


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