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CVE-2020-10595

9.8 · CRITICAL

pam-krb5 before 4.9 has a buffer overflow that might cause remote code execution in situations involving supplemental prompting by a Kerberos library.

Published Mar 31, 2020CWE-120EPSS 4.78%

Overview

CVE-2020-10595 is a critical-severity vulnerability. It was published on March 31, 2020 and has a CVSS 3.1 base score of 9.8 (CRITICAL).

This vulnerability has a CVSS 3.1 base score of 9.8, rated CRITICAL. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

Technical description

pam-krb5 before 4.9 has a buffer overflow that might cause remote code execution in situations involving supplemental prompting by a Kerberos library. It may overflow a buffer provided by the underlying Kerberos library by a single '\0' byte if an attacker responds to a prompt with an answer of a carefully chosen length. The effect may range from heap corruption to stack corruption depending on the structure of the underlying Kerberos library, with unknown effects but possibly including code execution. This code path is not used for normal authentication, but only when the Kerberos library does supplemental prompting, such as with PKINIT or when using the non-standard no_prompt PAM configuration option.

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

Refwww.openwall.com/lists/oss-security/2020/03/31/1GitHubgithub.com/rra/pam-krb5/commit/e7879e27a37119fad4faf133a9f70bdcdc75d760Reflists.debian.org/debian-lts-announce/2020/04/msg00000.htmlRefusn.ubuntu.com/4314-1/Refwww.debian.org/security/2020/dsa-4648Refwww.eyrie.org/~eagle/software/pam-krb5/security/2020-03-30.htmlRefwww.openwall.com/lists/oss-security/2020/03/31/1GitHubgithub.com/rra/pam-krb5/commit/e7879e27a37119fad4faf133a9f70bdcdc75d760Reflists.debian.org/debian-lts-announce/2020/04/msg00000.htmlRefusn.ubuntu.com/4314-1/

How CyberStrike helps

Frequently asked questions

What is CVE-2020-10595?

CVE-2020-10595 is a critical-severity vulnerability. It was published on March 31, 2020 and has a CVSS 3.1 base score of 9.8 (CRITICAL).

How severe is CVE-2020-10595?

This vulnerability has a CVSS 3.1 base score of 9.8, rated CRITICAL. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2020-10595?

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-2020-10595?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2020-10595 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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