CVE-2021-20208
Published: 19 April 2021
A flaw was found in cifs-utils in versions before 6.13. A user when mounting a krb5 CIFS file system from within a container can use Kerberos credentials of the host. The highest threat from this vulnerability is to data confidentiality and integrity.
Notes
| Author | Note |
|---|---|
| mdeslaur | per Red Hat bug, 6.13 was missing two important fixes, and 6.14 is required. per Debian, causes a regression, see: https://bugs.debian.org/989080 https://www.spinics.net/lists/linux-cifs/msg21976.html |
Priority
Status
| Package | Release | Status |
|---|---|---|
|
cifs-utils Launchpad, Ubuntu, Debian |
bionic |
Released
(2:6.8-1ubuntu1.2)
|
| focal |
Released
(2:6.9-1ubuntu0.2)
|
|
| groovy |
Ignored
(end of life)
|
|
| hirsute |
Ignored
(end of life)
|
|
| impish |
Not vulnerable
(2:6.11-3.1)
|
|
| jammy |
Not vulnerable
(2:6.14-1build1)
|
|
| kinetic |
Not vulnerable
(2:6.14-1build1)
|
|
| lunar |
Not vulnerable
(2:6.14-1build1)
|
|
| mantic |
Not vulnerable
(2:6.14-1build1)
|
|
| trusty |
Needed
|
|
| upstream |
Released
(6.14,2:6.11-3.1)
|
|
| xenial |
Needed
|
|
|
Patches: upstream: https://git.samba.org/cifs-utils.git/?p=cifs-utils.git;a=commit;h=e461afd8cfa6d0781ae0c5c10e89b6ef1ca6da32 upstream: https://git.samba.org/cifs-utils.git/?p=cifs-utils.git;a=commit;h=7f9711dd902a239c499682015d708f73ec884af2 |
||
Severity score breakdown
| Parameter | Value |
|---|---|
| Base score | 6.1 |
| Attack vector | Local |
| Attack complexity | High |
| Privileges required | Low |
| User interaction | Required |
| Scope | Changed |
| Confidentiality | Low |
| Integrity impact | High |
| Availability impact | None |
| Vector | CVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:C/C:L/I:H/A:N |