CVE-2023-39975

moderate-risk
Published 2023-08-16

kdc/do_tgs_req.c in MIT Kerberos 5 (aka krb5) 1.21 before 1.21.2 has a double free that is reachable if an authenticated user can trigger an authorization-data handling failure. Incorrect data is copied from one ticket to another.

Do I need to act?

~
1.2% chance of exploitation in next 30 days
EPSS score — moderate exploit probability
-
Not on CISA KEV list
No confirmed active exploitation reported to CISA
?
Patch status unknown
Check vendor advisories for fix availability and mitigation guidance
8
CVSS 8.8/10 High
NETWORK / LOW complexity

Affected Products (1)

Affected Vendors

Mit

References (12)

Patch https://github.com/krb5/krb5/commit/88a1701b423c13991a8064feeb26952d3641d840
Patch https://github.com/krb5/krb5/compare/krb5-1.21.1-final...krb5-1.21.2-final
https://security.netapp.com/advisory/ntap-20230915-0014/
https://security.netapp.com/advisory/ntap-20240201-0005/
https://security.netapp.com/advisory/ntap-20240201-0008/
Vendor Advisory https://web.mit.edu/kerberos/www/advisories/
Patch https://github.com/krb5/krb5/commit/88a1701b423c13991a8064feeb26952d3641d840
Patch https://github.com/krb5/krb5/compare/krb5-1.21.1-final...krb5-1.21.2-final
https://security.netapp.com/advisory/ntap-20230915-0014/
https://security.netapp.com/advisory/ntap-20240201-0005/
https://security.netapp.com/advisory/ntap-20240201-0008/
Vendor Advisory https://web.mit.edu/kerberos/www/advisories/
39
/ 100
moderate-risk
Severity 30/34 · Critical
Exploitability 4/34 · Minimal
Exposure 5/34 · Minimal