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CVE-2010-4021

2.1 · LOW

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 i…

Published Dec 2, 2010mitCWE-16EPSS 2.09%

Overview

CVE-2010-4021 is a low-severity vulnerability affecting mit kerberos_5. It was published on December 2, 2010 and has a CVSS 2.0 base score of 2.1 (LOW).

This vulnerability has a CVSS 2.0 base score of 2.1, rated LOW. It can be exploited remotely over the network. Some level of privileges is required for exploitation.

Technical description

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."

Remediation

Check the references section for vendor advisories and patches from mit. Update kerberos_5 to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

Affected products

VendorProductVersionsStatus

References

Refkb.vmware.com/kb/1035108Reflists.apple.com/archives/security-announce/2011/Mar/msg00006.htmlReflists.opensuse.org/opensuse-security-announce/2010-12/msg00000.htmlReflists.opensuse.org/opensuse-security-announce/2010-12/msg00006.htmlReflists.vmware.com/pipermail/security-announce/2011/000133.htmlRefosvdb.org/69607Refsupport.apple.com/kb/HT4581Refweb.mit.edu/kerberos/advisories/MITKRB5-SA-2010-007.txtRefwww.mandriva.com/security/advisories?name=MDVSA-2010:246Refwww.securityfocus.com/archive/1/514953/100/0/threaded

How CyberStrike helps

Frequently asked questions

What is CVE-2010-4021?

CVE-2010-4021 is a low-severity vulnerability affecting mit kerberos_5. It was published on December 2, 2010 and has a CVSS 2.0 base score of 2.1 (LOW).

How severe is CVE-2010-4021?

This vulnerability has a CVSS 2.0 base score of 2.1, rated LOW. It can be exploited remotely over the network. Some level of privileges is required for exploitation.

How do I fix or remediate CVE-2010-4021?

Check the references section for vendor advisories and patches from mit. Update kerberos_5 to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2010-4021?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2010-4021 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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