Vulnerability identifier: #VU27377

Vulnerability risk: Medium

CVSSv3.1: 5.7 [CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2020-10704

CWE-ID: CWE-121

Exploitation vector: Local network

Exploit availability: No

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

Vendor: Samba

Description

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to a boundary error when processing LDAP queries. A remote unauthenticated attacker can send large CLDAP packets to the affected system, trigger stack overflow and crash the service.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Samba: 4.12.0 - 4.12.1, 4.11.0 - 4.11.7, 4.10.0 - 4.10.14

---

External links
http://www.samba.org/samba/security/CVE-2020-10704.html

---

Q & A

Can this vulnerability be exploited remotely?

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

Is there known malware, which exploits this vulnerability?

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