CVE-2021-37750
Published: August 31, 2023Last modified: August 31, 2023
Description
The Key Distribution Center (KDC) in MIT Kerberos 5 (aka krb5) before 1.18.5 and 1.19.x before 1.19.3 has a NULL pointer dereference in kdc/do_tgs_req.c via a FAST inner body that lacks a server field.
Severity score breakdown
| Parameter | Value |
|---|---|
| Base score | 6.5 |
| Attack Vector | NETWORK |
| Attack complexity | LOW |
| Privileges required | LOW |
| User interaction | NONE |
| Scope | UNCHANGED |
| Confidentiality | NONE |
| Integrity impact | NONE |
| Availability impact | HIGH |
| Vector | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H |
Status
| Product | Release | Package | Status |
|---|---|---|---|
| Alpaquita Linux | 23 LTS | krb5 | Not affected (1.20.1-r0) |
| Stream | krb5 | Not affected (1.21.2-r0) |
References
- https://github.com/krb5/krb5/commit/d775c95af7606a51bf79547a94fa52ddd1cb7f49
- https://github.com/krb5/krb5/releases
- https://lists.debian.org/debian-lts-announce/2021/09/msg00019.html
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/MFCLW7D46E4VCREKKH453T5DA4XOLHU2/
- https://lists.fedoraproject.org/archives/list/[email protected]/message/MFCLW7D46E4VCREKKH453T5DA4XOLHU2/
- https://security.netapp.com/advisory/ntap-20210923-0002/
- https://web.mit.edu/kerberos/advisories/
- https://www.oracle.com/security-alerts/cpujul2022.html
- https://www.starwindsoftware.com/security/sw-20220817-0004/