Main Vulnerability Database Vulnerabilities #VU64997

Cryptographic issues in Kerberos 5 - CVE-2010-4020

Published: July 7, 2022

Vulnerability identifier: #VU64997

CSH Severity: Low

CVSS v4: 5.3 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N]

CVE-ID: CVE-2010-4020

CWE-ID: CWE-310

Exploitation vector: Remote access

Exploit availability: No public exploit available

Vulnerability details

The vulnerability allows a remote user to escalate privileges on the system.

The vulnerability exists due to MIT Kerberos 5 does not reject RC4 key-derivation checksums. A remote user can forge a AD-SIGNEDPATH or AD-KDC-ISSUED signature, and possibly gain privileges, by leveraging the small key space that results from certain one-byte stream-cipher operations.

Affected software

Kerberos 5
IBM Security Verify Access

How to mitigate CVE-2010-4020

Install updates from vendor's website.

Kerberos 5 - update to 1.8.4
IBM Security Verify Access - update to 10.0.4.0

External References

Related Security Bulletins