CVE-2022-45142
heimdal - security update
7.5
HIGH
CVSS 3.1
EPSS 0.09%
Description
The fix for CVE-2022-3437 included changing memcmp to be constant time and a workaround for a compiler bug by adding "!= 0" comparisons to the result of memcmp. When these patches were backported to the heimdal-7.7.1 and heimdal-7.8.0 branches (and possibly other branches) a logic inversion sneaked in causing the validation of message integrity codes in gssapi/arcfour to be inverted.
How to fix CVE-2022-45142
To remediate CVE-2022-45142, upgrade the affected package to a fixed version below.
- —upgrade to 7.7.1-r1 or later
- —upgrade to 7.7.0+dfsg-2+deb11u3 or later
- —upgrade to 7.5.0+dfsg-3+deb10u2 or later
- —upgrade to 7.7.0+dfsg-2+deb11u3 or later
Is CVE-2022-45142 being exploited?
Low — EPSS is 0.1%, meaning exploitation activity has not been observed at scale.
Affected packages (4)
- from 0, < 7.7.1-r1
- from 0, < 7.7.0+dfsg-2+deb11u3
- from 0, < 7.5.0+dfsg-3+deb10u2
- from 0, < 7.7.0+dfsg-2+deb11u3
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | HIGH7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N |