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CVE-2022-42898

8.8 · HIGH

PAC parsing in MIT Kerberos 5 (aka krb5) before 1.19.4 and 1.20.x before 1.20.1 has integer overflows that may lead to remote code execution (in KDC, kadmind, or a GSS or Kerberos application serve…

Published Dec 25, 2022CWE-190EPSS 6.47%

Overview

CVE-2022-42898 is a high-severity vulnerability. It was published on December 25, 2022 and has a CVSS 3.1 base score of 8.8 (HIGH).

This vulnerability has a CVSS 3.1 base score of 8.8, rated HIGH. It can be exploited remotely over the network. Some level of privileges is required for exploitation.

Technical description

PAC parsing in MIT Kerberos 5 (aka krb5) before 1.19.4 and 1.20.x before 1.20.1 has integer overflows that may lead to remote code execution (in KDC, kadmind, or a GSS or Kerberos application server) on 32-bit platforms (which have a resultant heap-based buffer overflow), and cause a denial of service on other platforms. This occurs in krb5_pac_parse in lib/krb5/krb/pac.c. Heimdal before 7.7.1 has "a similar bug."

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. 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.

References

Refbugzilla.samba.org/show_bug.cgi?id=15203GitHubgithub.com/heimdal/heimdal/security/advisories/GHSA-64mq-fvfj-5x3cGitHubgithub.com/krb5/krb5/commit/ea92d2f0fcceb54a70910fa32e9a0d7a5afc3583Refsecurity.gentoo.org/glsa/202309-06Refsecurity.gentoo.org/glsa/202310-06Refsecurity.netapp.com/advisory/ntap-20230216-0008/Refsecurity.netapp.com/advisory/ntap-20230223-0001/Refweb.mit.edu/kerberos/advisories/Refweb.mit.edu/kerberos/krb5-1.19/Refweb.mit.edu/kerberos/krb5-1.20/README-1.20.1.txt

How CyberStrike helps

Frequently asked questions

What is CVE-2022-42898?

CVE-2022-42898 is a high-severity vulnerability. It was published on December 25, 2022 and has a CVSS 3.1 base score of 8.8 (HIGH).

How severe is CVE-2022-42898?

This vulnerability has a CVSS 3.1 base score of 8.8, rated HIGH. It can be exploited remotely over the network. Some level of privileges is required for exploitation.

How do I fix or remediate CVE-2022-42898?

Check the references section for vendor advisories, patches, and mitigation guidance. 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-2022-42898?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2022-42898 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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