CVE-2021-3671
heimdal - security update
6.5
MEDIUM
CVSS 3.1
EPSS 5.1%
Description
A null pointer de-reference was found in the way samba kerberos server handled missing sname in TGS-REQ (Ticket Granting Server - Request). An authenticated user could use this flaw to crash the samba server.
How to fix CVE-2021-3671
To remediate CVE-2021-3671, upgrade the affected package to a fixed version below.
- Alpine/heimdal—upgrade to 7.7.1-r0 or later
- —upgrade to 4.14.8-r0 or later
- —upgrade to 7.7.0+dfsg-2+deb11u2 or later
- —upgrade to 7.7.0+dfsg-2+deb11u2 or later
- —upgrade to 2:4.13.13+dfsg-1~deb11u1 or later
Is CVE-2021-3671 being exploited?
Moderate — EPSS is 5.1%. Track this CVE but it's not at the top of the prioritisation list.
Affected packages (5)
- from 0, < 7.7.1-r0
- from 0, < 4.14.8-r0
- from 0, < 7.7.0+dfsg-2+deb11u2
- from 0, < 7.7.0+dfsg-2+deb11u2
- from 0, < 2:4.13.13+dfsg-1~deb11u1
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | MEDIUM6.5 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H |