CVE-2021-44142
Published: 31 January 2022
The Samba vfs_fruit module uses extended file attributes (EA, xattr) to provide "...enhanced compatibility with Apple SMB clients and interoperability with a Netatalk 3 AFP fileserver." Samba versions prior to 4.13.17, 4.14.12 and 4.15.5 with vfs_fruit configured allow out-of-bounds heap read and write via specially crafted extended file attributes. A remote attacker with write access to extended file attributes can execute arbitrary code with the privileges of smbd, typically root.
Priority
Status
| Package | Release | Status |
|---|---|---|
|
samba
Launchpad, Ubuntu, Debian |
bionic |
Released
(2:4.7.6+dfsg~ubuntu-0ubuntu2.28)
|
| focal |
Released
(2:4.13.17~dfsg-0ubuntu0.21.04.1)
|
|
| impish |
Released
(2:4.13.17~dfsg-0ubuntu0.21.10.1)
|
|
| jammy |
Released
(4.13.17~dfsg-0ubuntu1)
|
|
| trusty |
Released
(2:4.3.11+dfsg-0ubuntu0.14.04.20+esm12)
Available with Ubuntu Pro or Ubuntu Pro (Infra-only) |
|
| upstream |
Released
(4.13.17,4.14.12,4.15.5)
|
|
| xenial |
Released
(2:4.3.11+dfsg-0ubuntu0.16.04.34+esm1)
Available with Ubuntu Pro or Ubuntu Pro (Infra-only) |
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 |