Privilege escalation in Samba



Published: 2024-02-27
Risk Medium
Patch available YES
Number of vulnerabilities 1
CVE-ID CVE-2020-25720
CWE-ID CWE-264
Exploitation vector Local network
Public exploit N/A
Vulnerable software
Subscribe 		Samba
Server applications / Directory software, identity management

Vendor Samba

Security Bulletin

This security bulletin contains one medium risk vulnerability.

1) Permissions, Privileges, and Access Controls

EUVDB-ID: #VU86856

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 - Permissions, Privileges, and Access Controls

Exploit availability: No

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).

How the attacker can exploit this vulnerability?

The attacker would have to send a specially crafted request to the affected application in order to exploit this vulnerability.

Is there known malware, which exploits this vulnerability?

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



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