CVE-2020-28196
medium
CVSS v3
—
CVSS v2
—
VIR risk
5.5
Description
MIT Kerberos 5 (aka krb5) before 1.17.2 and 1.18.x before 1.18.3 allows unbounded recursion via an ASN.1-encoded Kerberos message because the lib/krb5/asn.1/asn1_encode.c support for BER indefinite lengths lacks a recursion limit.
Predictions
Exploit likelihood
20%
Patch ETA
—
Heuristic predictions, AS-IS, for prioritization only.
Mitigations
Vendor advisory: rocky — https://errata.rockylinux.org/RLSA-2021:1593
Vendor advisory: debian — https://security-tracker.debian.org/tracker/CVE-2020-28196
Vendor advisory: suse — https://www.suse.com/security/cve/CVE-2020-28196.html
OS impact
| OS | Version | Status | Fixed in |
|---|---|---|---|
| sles | affected | | |
| debian | bookworm | fixed | 1.18.3-1 |
| debian | bullseye | fixed | 1.18.3-1 |
| debian | forky | fixed | 1.18.3-1 |
| debian | sid | fixed | 1.18.3-1 |
| debian | trixie | fixed | 1.18.3-1 |
| rocky | 8 | fixed | |
References
Verify integrity in audit chain (admin only). AS-IS.