Vulnerability identifier: #VU86856

Vulnerability risk: Medium

CVSSv3.1: 4 [CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2020-25720

CWE-ID: CWE-264

Exploitation vector: Local network

Exploit availability: No

Vulnerable software:
Samba
Server applications / Directory software, identity management

Vendor: Samba

Description

The vulnerability allows a local user to escalate privileges within the network.

The vulnerability exists due to create child permissions allows full write access to all attributes. A local user can escalate privileges within the network.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Samba: 4.17.0 - 4.17.8

---

External links
http://bugzilla.samba.org/show_bug.cgi?id=14810
http://gitlab.com/samba-team/samba/-/commit/cc64ea24daa649dc8de4a212c7abfbe111095655
http://gitlab.com/samba-team/samba/-/merge_requests/2514

---

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated user via the local network (LAN).

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.