Vulnerability 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.
CVSS Score
CRITICAL
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Pam-Krb5 Project | Pam-Krb5 | < 4.9 |
| Debian | Debian Linux | 8.0 |
Related Weaknesses (CWE)
References
- http://www.openwall.com/lists/oss-security/2020/03/31/1Mailing ListPatchThird Party Advisory
- https://github.com/rra/pam-krb5/commit/e7879e27a37119fad4faf133a9f70bdcdc75d760PatchThird Party Advisory
- https://lists.debian.org/debian-lts-announce/2020/04/msg00000.htmlMailing ListThird Party Advisory
- https://usn.ubuntu.com/4314-1/
- https://www.debian.org/security/2020/dsa-4648Third Party Advisory
- https://www.eyrie.org/~eagle/software/pam-krb5/security/2020-03-30.html
- http://www.openwall.com/lists/oss-security/2020/03/31/1Mailing ListPatchThird Party Advisory
- https://github.com/rra/pam-krb5/commit/e7879e27a37119fad4faf133a9f70bdcdc75d760PatchThird Party Advisory
- https://lists.debian.org/debian-lts-announce/2020/04/msg00000.htmlMailing ListThird Party Advisory
- https://usn.ubuntu.com/4314-1/
- https://www.debian.org/security/2020/dsa-4648Third Party Advisory
- https://www.eyrie.org/~eagle/software/pam-krb5/security/2020-03-30.html
FAQ
What is CVE-2020-10595?
CVE-2020-10595 is a vulnerability with a CVSS score of 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. It may overflow a buffer provided by the underlyi...
How severe is CVE-2020-10595?
CVE-2020-10595 has been rated CRITICAL with a CVSS base score of 9.8/10. This is considered a critical vulnerability requiring immediate attention.
Is there a patch for CVE-2020-10595?
Check the references section above for vendor advisories and patch information. Affected products include: Pam-Krb5 Project Pam-Krb5, Debian Debian Linux.