NULL pointer dereference in Mit Kerberos 5
CVE-2021-37750
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.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.
EPSS exploit prediction
EPSS: 0.025 (84.7th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 85th percentile — 84.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.022 · newest: 0.025 · change: +0.003
Affected products
- Mit Kerberos 5
- Oracle Communications Cloud Native Core Network Slice Selection Function — versions 22.1.0
- Starwindsoftware Starwind Virtual San — versions v8r13
- Debian Linux — versions 9.0
- Fedoraproject Fedora — versions 33
Weakness classification (CWE)
Public proof-of-concept exploits
References
- web.mit.edu/kerberos/advisories/ (Vendor Advisory)
- github.com/krb5/krb5/releases (Third Party Advisory, Release Notes)
- lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/… (vendor-advisory)
- lists.debian.org/debian-lts-announce/2021/09/msg00019.html (mailing-list, Mailing List, Third Party Advisory)
- www.oracle.com/security-alerts/cpujul2022.html (Patch, Third Party Advisory)
- github.com/krb5/krb5/commit/d775c95af7606a51bf79547a94fa52ddd1cb7f49 (Patch, Third Party Advisory)
- security.netapp.com/advisory/ntap-20210923-0002/ (Third Party Advisory)
- www.starwindsoftware.com/security/sw-20220817-0004/ (Third Party Advisory)
- 0b142b55-0307-4c5a-b3c9-f314f3fb7c5e
Frequently asked questions
- What is CVE-2021-37750?
- CVE-2021-37750 is a medium-severity vulnerability in Mit Kerberos 5, classified under NULL Pointer Dereference. CVSS score: 6.5/10. Published 2021-08-23.
- How severe is CVE-2021-37750?
- Medium severity. CVSS v3 base score is 6.5 out of 10.
- Is CVE-2021-37750 known to be exploited?
- 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.