| Name | CVE-2020-25720 |
| Description | A vulnerability was found in Samba where a delegated administrator with permission to create objects in Active Directory can write to all attributes of the newly created object, including security-sensitive attributes, even after the object's creation. This issue occurs because the administrator owns the object due to the lack of an Access Control List (ACL) at the time of creation and later being recognized as the 'creator owner.' The retained significant rights of the delegated administrator may not be well understood, potentially leading to unintended privilege escalation or security risks. |
| Source | CVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more) |
Vulnerable and fixed packages
The table below lists information on source packages.
| Source Package | Release | Version | Status |
|---|
| samba (PTS) | jessie, jessie (lts) | 2:4.2.14+dfsg-0+deb8u16 | vulnerable |
| stretch (security) | 2:4.5.16+dfsg-1+deb9u4 | vulnerable |
| stretch (lts), stretch | 2:4.5.16+dfsg-1+deb9u5 | vulnerable |
| buster (security), buster, buster (lts) | 2:4.9.5+dfsg-5+deb10u5 | vulnerable |
| bullseye (security), bullseye | 2:4.13.13+dfsg-1~deb11u6 | vulnerable |
| bookworm (security), bookworm | 2:4.17.12+dfsg-0+deb12u1 | fixed |
| trixie | 2:4.21.2+dfsg-3 | fixed |
| sid | 2:4.21.2+dfsg-4 | fixed |
The information below is based on the following data on fixed versions.
| Package | Type | Release | Fixed Version | Urgency | Origin | Debian Bugs |
|---|
| samba | source | (unstable) | 2:4.17.8+dfsg-1 | | | |
Notes
[bullseye] - samba <ignored> (Domain controller functionality is EOLed, see DSA DSA-5477-1)
[buster] - samba <ignored> (Domain controller functionality is EOLed, see DSA-5015-1)
https://bugzilla.samba.org/show_bug.cgi?id=14810
https://gitlab.com/samba-team/samba/-/merge_requests/2514
https://gitlab.com/samba-team/samba/-/commit/cc64ea24daa649dc8de4a212c7abfbe111095655
[stretch] - samba <ignored> (Domain controller functionality is EOLed)
[jessie] - samba <ignored> (Domain controller functionality is EOLed)