Vulnerability identifier: #VU66202
Vulnerability risk: Low
CVSSv4.0: 1.3 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/U:Clear]
CVE-ID: CVE-2021-3670
CWE-ID:
CWE-399
Exploitation vector: Network
Exploit availability: No
Vulnerable software:
Samba
Server applications /
Directory software, identity management
Vendor: Samba
Description
The vulnerability allows a remote user to perform a denial of service (DoS) attack.
The vulnerability exists due to Samba AD DC LDAP does not honor the MaxQueryDuration option when handling LDAP requests. A remote user can execute heavy queries and perform a denial of service (DoS) attack.
Mitigation
Vendor does not consider this a security vulnerability and recommends to follow general hardening rules to avoid similar attack vectors.
Vulnerable software versions
Samba: 4.14.3
External links
https://bugzilla.samba.org/show_bug.cgi?id=14694
https://gitlab.com/samba-team/samba/-/commit/1d5b155619bc532c46932965b215bd73a920e56f
Can this vulnerability be exploited remotely?
Yes. This vulnerability can be exploited by a remote authenticated user via the Internet.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability.