#VU57324 NULL pointer dereference in Samba - CVE-2021-3671

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Main Vulnerability Database Vulnerabilities #VU57324

#VU57324 NULL pointer dereference in Samba - CVE-2021-3671

Published: October 13, 2021


Vulnerability identifier: #VU57324
Vulnerability risk: Medium
CVSSv4.0: CVSS:4.0/AV:A/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: CVE-2021-3671
CWE-ID: CWE-476
Exploitation vector: Adjecent network
Exploit availability: No public exploit available
Vulnerable software:
Samba
Software vendor:
Samba

Description

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

The vulnerability exists due to a NULL pointer dereference error in the way samba kerberos server handles missing sname attribute in TGS-REQ (Ticket Granting Server - Request). A remote authenticated user can send a specially crafted request to the samba server and perform a denial of service (DoS) attack.


Remediation

Install updates from vendor's website.

External links