CVE-2020-25721
Published: 9 November 2021
Kerberos acceptors need easy access to stable AD identifiers (eg objectSid). Samba as an AD DC now provides a way for Linux applications to obtain a reliable SID (and samAccountName) in issued tickets.
Notes
| Author | Note |
|---|---|
| mdeslaur | Fixing this in Ubuntu 18.04 LTS would require substantial code backports. We will not be fixing this issue in Ubuntu 18.04 LTS. In environments where this is of concern, we recommend updating to a more recent Ubuntu version. |
Priority
Status
| Package | Release | Status |
|---|---|---|
|
samba Launchpad, Ubuntu, Debian |
bionic |
Ignored
(changes too intrusive)
|
| focal |
Released
(2:4.13.14+dfsg-0ubuntu0.20.04.1)
|
|
| hirsute |
Released
(2:4.13.14+dfsg-0ubuntu0.21.04.1)
|
|
| impish |
Released
(2:4.13.14+dfsg-0ubuntu0.21.10.1)
|
|
| jammy |
Released
(2:4.13.14+dfsg-0ubuntu1)
|
|
| kinetic |
Released
(2:4.13.14+dfsg-0ubuntu1)
|
|
| lunar |
Released
(2:4.13.14+dfsg-0ubuntu1)
|
|
| upstream |
Released
(4.13.14)
|
Severity score breakdown
| Parameter | Value |
|---|---|
| Base score | 8.8 |
| Attack vector | Network |
| Attack complexity | Low |
| Privileges required | Low |
| User interaction | None |
| Scope | Unchanged |
| Confidentiality | High |
| Integrity impact | High |
| Availability impact | High |
| Vector | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |