CVE-2021-3671 describes a null pointer dereference vulnerability in the Samba Kerberos server, specifically impacting how it handles missing sname in TGS-REQ. An authenticated user can exploit this flaw to crash the Samba server, affecting products like Debian and NetApp. With a CVSS score of 6.5 (MEDIUM), the vulnerability is network-exploitable with low attack complexity and requires low privileges, leading to high availability impact. There is currently no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
< 4.13.12CPE matchmatch criteria | cpe:2.3:a:samba:samba:*:*:*:*:*:*:*:* | ||
>= 4.14.0, < 4.14.8CPE matchmatch criteria | cpe:2.3:a:samba:samba:*:*:*:*:*:*:*:* | ||
10.0CPE matchmatch criteria | cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:* | ||
11.0CPE matchmatch criteria | cpe:2.3:o:debian:debian_linux:11.0:*:*:*:*:*:*:* | ||
Range not provided by sourceCPE matchmatch criteria | cpe:2.3:a:netapp:management_services_for_element_software:-:*:*:*:*:*:*:* |
CVSS version used by this source: 3.1
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.1 GitHub mentions.
No media coverage found for this CVE.
The average CVE in this peer group has 0.0 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.
CVE-2021-3671
Oct 8, 2024A null pointer de-reference was found in the way samba kerberos server handled missing sname in TGS-REQ (Ticket Granting Server - Request). An authenticated user could use this flaw to crash the samba server.
Oct 12, 2021samba: Null pointer dereference on missing sname in TGS-REQ
Aug 31, 2021