CVE-2021-23192
Publication date 9 November 2021
Last updated 25 August 2025
Ubuntu priority
Description
A flaw was found in the way samba implemented DCE/RPC. If a client to a Samba server sent a very large DCE/RPC request, and chose to fragment it, an attacker could replace later fragments with their own data, bypassing the signature requirements.
Status
| Package | Ubuntu Release | Status |
|---|---|---|
| samba | 22.04 LTS jammy |
Fixed 2:4.13.14+dfsg-0ubuntu1
|
| 20.04 LTS focal |
Fixed 2:4.13.14+dfsg-0ubuntu0.20.04.1
|
|
| 18.04 LTS bionic |
Not affected
|
|
| 16.04 LTS xenial |
Not affected
|
|
| 14.04 LTS trusty |
Not affected
|
Notes
Severity score breakdown
CVSS version: CVSS v3.0
Base score
7.5 · High
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
References
Related Ubuntu Security Notices (USN)
- USN-5142-1
- Samba vulnerabilities
- 11 November 2021