MIT Kerberos 5-1.6 missing authentication

CVSS Meta Temp Score
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CTI Interest Score
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7.3$0-$5k0.00

Summaryinfo

A vulnerability categorized as critical has been discovered in MIT Kerberos 5-1.6. This affects an unknown part. Executing a manipulation can lead to Remote Code Execution. This vulnerability is handled as CVE-2007-0956. There is not any exploit available. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability was found in MIT Kerberos 5-1.6 (Network Authentication Software). It has been declared as critical. This vulnerability affects an unknown functionality. The manipulation with an unknown input leads to a remote code execution vulnerability. The CWE definition for the vulnerability is CWE-306. The product does not perform any authentication for functionality that requires a provable user identity or consumes a significant amount of resources. As an impact it is known to affect confidentiality, integrity, and availability. CVE summarizes:

The telnet daemon (telnetd) in MIT krb5 before 1.6.1 allows remote attackers to bypass authentication and gain system access via a username beginning with a - character, a similar issue to CVE-2007-0882.

The bug was discovered 04/03/2007. The weakness was released 04/05/2007 as confirmed advisory (CERT.org). The advisory is shared for download at kb.cert.org. This vulnerability was named CVE-2007-0956 since 02/14/2007. The exploitation appears to be difficult. 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.

It is declared as proof-of-concept. The vulnerability scanner Nessus provides a plugin with the ID 23517 (Solaris 9 (sparc) : 116462-06), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Solaris Local Security Checks and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 156081 (Oracle Enterprise Linux Update for krb5 (ELSA-2007-0095)).

Upgrading to version 1.6.1 eliminates this vulnerability. A possible mitigation has been published before and not just after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at X-Force (33414), Tenable (23517), SecurityFocus (BID 23281†), OSVDB (34106†) and Secunia (SA24706†). Entries connected to this vulnerability are available at VDB-36019 and VDB-36017. VulDB is the best source for vulnerability data and more expert information about this specific topic.

Productinfo

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Vendor

Name

Version

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Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 8.1
VulDB Meta Temp Score: 7.3

VulDB Base Score: 8.1
VulDB Temp Score: 7.3
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: Missing authentication
CWE: CWE-306 / CWE-287
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Proof-of-Concept

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 23517
Nessus Name: Solaris 9 (sparc) : 116462-06
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍
Nessus Port: 🔍

OpenVAS ID: 58328
OpenVAS Name: Debian Security Advisory DSA 1276-1 (krb5)
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: Kerberos 1.6.1

Timelineinfo

11/06/2006 🔍
02/14/2007 +100 days 🔍
04/03/2007 +48 days 🔍
04/03/2007 +0 days 🔍
04/03/2007 +0 days 🔍
04/03/2007 +0 days 🔍
04/03/2007 +0 days 🔍
04/04/2007 +1 days 🔍
04/05/2007 +1 days 🔍
04/05/2007 +0 days 🔍
04/10/2007 +5 days 🔍
03/13/2015 +2894 days 🔍
01/12/2025 +3593 days 🔍

Sourcesinfo

Vendor: mit.edu

Advisory: kb.cert.org
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2007-0956 (🔍)
GCVE (CVE): GCVE-0-2007-0956
GCVE (VulDB): GCVE-100-36016

OVAL: 🔍

CERT: 🔍
X-Force: 33414
SecurityFocus: 23281 - MIT Kerberos 5 Telnet Daemon Authentication Bypass Vulnerability
Secunia: 24706 - Ubuntu update for krb5, Moderately Critical
OSVDB: 34106 - CVE-2007-0956 - MIT - Kerberos 5 - Security Bypass Issue
SecurityTracker: 1017848
Vulnerability Center: 14783 - MIT Kerberos 5 Telnet Daemon Authentication Bypass via -e in Username, High
Vupen: ADV-2007-1249

See also: 🔍

Entryinfo

Created: 03/13/2015 14:56
Updated: 01/12/2025 18:07
Changes: 03/13/2015 14:56 (84), 07/17/2019 14:07 (4), 07/14/2021 08:55 (3), 01/12/2025 18:07 (15)
Complete: 🔍
Cache ID: 216:29D:103

VulDB is the best source for vulnerability data and more expert information about this specific topic.

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