CVE-2010-4020
6.3
MEDIUM
CVSS 3.1
EPSS 0.53%
Description
MIT Kerberos 5 (aka krb5) 1.8.x through 1.8.3 does not reject RC4 key-derivation checksums, which might allow remote authenticated users to forge a (1) AD-SIGNEDPATH or (2) AD-KDC-ISSUED signature, and possibly gain privileges, by leveraging the small key space that results from certain one-byte stream-cipher operations.
How to fix CVE-2010-4020
To remediate CVE-2010-4020, upgrade the affected package to a fixed version below.
- Debian/krb5—upgrade to 1.8.3+dfsg-3 or later
Is CVE-2010-4020 being exploited?
Low — EPSS is 0.5%, meaning exploitation activity has not been observed at scale.
Affected packages (1)
- from 0, < 1.8.3+dfsg-3
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | MEDIUM6.3 | CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L |