CVE-2021-3671
Published: 12 October 2021
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.
Notes
| Author | Note |
|---|---|
| mdeslaur | same as CVE-2021-37750 for MIT krb5 |
Priority
Status
| Package | Release | Status |
|---|---|---|
|
heimdal Launchpad, Ubuntu, Debian |
hirsute |
Ignored
(end of life)
|
| impish |
Ignored
(end of life)
|
|
| trusty |
Released
(1.6~git20131207+dfsg-1ubuntu1.2+esm1)
Available with Ubuntu Pro or Ubuntu Pro (Infra-only) |
|
| upstream |
Released
(7.7.0+dfsg-3)
|
|
| bionic |
Released
(7.5.0+dfsg-1ubuntu0.1)
|
|
| focal |
Released
(7.7.0+dfsg-1ubuntu1.1)
|
|
| jammy |
Not vulnerable
(7.7.0+dfsg-3ubuntu1)
|
|
| xenial |
Released
(1.7~git20150920+dfsg-4ubuntu1.16.04.1+esm1)
Available with Ubuntu Pro or Ubuntu Pro (Infra-only) |
|
| kinetic |
Not vulnerable
(7.7.0+dfsg-3ubuntu1)
|
|
| lunar |
Not vulnerable
(7.7.0+dfsg-3ubuntu1)
|
|
|
Patches: upstream: https://github.com/heimdal/heimdal/commit/04171147948d0a3636bc6374181926f0fb2ec83a upstream: https://github.com/heimdal/heimdal/commit/773802aecfb4b6a73817fa522faeb55b2a7cdb2a |
||
|
samba Launchpad, Ubuntu, Debian |
impish |
Released
(2:4.13.14+dfsg-0ubuntu0.21.10.1)
|
| upstream |
Released
(4.13.13)
|
|
| xenial |
Needed
|
|
| trusty |
Needed
|
|
| focal |
Released
(2:4.13.14+dfsg-0ubuntu0.20.04.1)
|
|
| hirsute |
Released
(2:4.13.14+dfsg-0ubuntu0.21.04.1)
|
|
| bionic |
Released
(2:4.7.6+dfsg~ubuntu-0ubuntu2.26)
|
|
| jammy |
Released
(2:4.13.14+dfsg-0ubuntu1)
|
|
| kinetic |
Released
(2:4.13.14+dfsg-0ubuntu1)
|
|
| lunar |
Released
(2:4.13.14+dfsg-0ubuntu1)
|
|
|
Patches: upstream: https://gitlab.com/samba-team/samba/-/commit/0cb4b939f192376bf5e33637863a91a20f74c5a5 |
||
Severity score breakdown
| Parameter | Value |
|---|---|
| Base score | 6.5 |
| Attack vector | Network |
| Attack complexity | Low |
| Privileges required | Low |
| User interaction | None |
| Scope | Unchanged |
| Confidentiality | None |
| Integrity impact | None |
| Availability impact | High |
| Vector | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H |