Vulnerability · Published Aug 16, 2023 · Assigned by mitre
CVE-2023-39975
High 8.8
In plain English
A high-severity double free in the krb5-devel package (AlmaLinux). There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 1.5% (higher than 74% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS 3.1)8.8High
Exploit odds (30 days)1.5%top 26.2% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official description
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.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| AlmaLinux:9 | krb5-devel | 1.21.1-1.el9 | ALSA-2023:6699 |
| AlmaLinux:9 | krb5-libs | 1.21.1-1.el9 | ALSA-2023:6699 |
| AlmaLinux:9 | krb5-pkinit | 1.21.1-1.el9 | ALSA-2023:6699 |
| AlmaLinux:9 | krb5-server | 1.21.1-1.el9 | ALSA-2023:6699 |
| AlmaLinux:9 | krb5-server-ldap | 1.21.1-1.el9 | ALSA-2023:6699 |
| AlmaLinux:9 | krb5-workstation | 1.21.1-1.el9 | ALSA-2023:6699 |
| AlmaLinux:9 | libkadm5 | 1.21.1-1.el9 | ALSA-2023:6699 |
| Rocky Linux:9 | krb5 | 0:1.21.1-10.el9_8 | RLSA-2023:6699 |
Affected products (as reported)
Weakness: CWE-415 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
References
- https://web.mit.edu/kerberos/www/advisories/
- https://github.com/krb5/krb5/compare/krb5-1.21.1-final...krb5-1.21.2-final
- https://github.com/krb5/krb5/commit/88a1701b423c13991a8064feeb26952d3641d840
- https://security.netapp.com/advisory/ntap-20230915-0014/
- https://security.netapp.com/advisory/ntap-20240201-0008/
- https://security.netapp.com/advisory/ntap-20240201-0005/