MIT Kerberos 5-1.7 Key Distribution Center access control

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.
3.1$0-$5k0.00

A vulnerability, which was classified as problematic, was found in MIT Kerberos 5-1.7 (Network Authentication Software). Affected is some unknown functionality of the component Key Distribution Center. The manipulation with an unknown input leads to a access control vulnerability. CWE is classifying the issue as CWE-264. This is going to have an impact on integrity. CVE summarizes:

The Key Distribution Center (KDC) in MIT Kerberos 5 (aka krb5) 1.7 does not properly restrict the use of TGT credentials for armoring TGS requests, which might allow remote authenticated users to impersonate a client by rewriting an inner request, aka a "KrbFastReq forgery issue."

The weakness was released 11/30/2010 by Sam Hartman (Website). The advisory is shared for download at vupen.com. This vulnerability is traded as CVE-2010-4021. The exploitability is told to be difficult. It is possible to launch the attack remotely. A authentication is required for exploitation. There are neither technical details nor an exploit publicly available. The MITRE ATT&CK project declares the attack technique as T1068.

The vulnerability scanner Nessus provides a plugin with the ID 51103 (FreeBSD : krb5 -- client impersonation vulnerability (4ccbd40d-03f7-11e0-bf50-001a926c7637)), 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 216007 (VMWare ESXi 4.1.0 Patch Release ESXi410-201104001 Missing (KB1035111)).

A possible mitigation has been published immediately after the disclosure of the vulnerability.

The vulnerability is also documented in the vulnerability database at Tenable (51103). Entries connected to this vulnerability are available at 55595, 55591, 55590 and 57340.

Productinfo

Type

Vendor

Name

Version

License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB CVSS-B Score: 🔍
VulDB CVSS-BT Score: 🔍
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 3.1
VulDB Meta Temp Score: 3.1

VulDB Base Score: 3.1
VulDB Temp Score: 3.1
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

AVACAuCIA
💳💳💳💳💳💳
💳💳💳💳💳💳
💳💳💳💳💳💳
VectorComplexityAuthenticationConfidentialityIntegrityAvailability
unlockunlockunlockunlockunlockunlock
unlockunlockunlockunlockunlockunlock
unlockunlockunlockunlockunlockunlock

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

NVD Base Score: 🔍

Exploitinginfo

Class: Access control
CWE: CWE-264
CAPEC: 🔍
ATT&CK: 🔍

Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

0-Dayunlockunlockunlockunlock
Todayunlockunlockunlockunlock

Nessus ID: 51103
Nessus Name: FreeBSD : krb5 -- client impersonation vulnerability (4ccbd40d-03f7-11e0-bf50-001a926c7637)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Port: 🔍

OpenVAS ID: 68691
OpenVAS Name: FreeBSD Ports: krb5
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

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

Timelineinfo

10/20/2010 🔍
11/30/2010 +41 days 🔍
11/30/2010 +0 days 🔍
11/30/2010 +0 days 🔍
11/30/2010 +0 days 🔍
12/02/2010 +2 days 🔍
12/05/2010 +3 days 🔍
12/05/2010 +0 days 🔍
12/10/2010 +4 days 🔍
03/19/2015 +1560 days 🔍
10/06/2021 +2393 days 🔍

Sourcesinfo

Vendor: mit.edu

Advisory: USN-1030-1⛔
Researcher: Sam Hartman
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2010-4021 (🔍)
OVAL: 🔍
IAVM: 🔍

Vulnerability Center: 28481 - MIT Kerberos 5 1.7 Allows Remote Attackers to Impersonate a Client, Low
SecurityFocus: 45122 - MIT Kerberos 5 Key Distribution Center 'KrbFastReq' Forgery Security Bypass Vulnerability
OSVDB: 69607 - MIT Kerberos 5 (krb5) KDC TGS Request TGT Credentials Inner Request KrbFastReq Forgery Issue

See also: 🔍

Entryinfo

Created: 03/19/2015 14:37
Updated: 10/06/2021 03:20
Changes: 03/19/2015 14:37 (68), 03/10/2017 10:33 (10), 10/06/2021 03:12 (5), 10/06/2021 03:20 (1)
Complete: 🔍
Cache ID: 52:E54:103

Discussion

No comments yet. Languages: en.

Please log in to comment.

◂ PreviousOverviewNext ▸

Do you need the next level of professionalism?

Upgrade your account now!