CVE-2021-3671 — NULL Pointer Dereference in Samba

CWE-476 — NULL Pointer Dereference10 documents8 sources
Severity
6.5MEDIUMNVD
EPSS
3.0%
top 13.39%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
3
Heimdal Project HeimdalSambaDebian Linux
Timeline
PublishedOct 12
Latest updateOct 13

Description

A 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.

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:HExploitability: 2.8 | Impact: 3.6

Affected Packages4 packages

▶NVDsamba/samba4.14.0 — 4.14.8+1
▶Debiansamba/samba< 2:4.13.13+dfsg-1~deb11u1+3
▶CVEListV5samba/sambaFixed in samba 4.13.12, samba 4.14.8
▶Debianheimdal_project/heimdal< 7.7.0+dfsg-2+deb11u2+3

Also affects: Debian Linux 10.0, 11.0

Patches

Patch: github.com ↗Patch: github.com ↗

🔴Vulnerability Details

3
GHSA
GHSA-ghqf-jx44-h9c5: A null pointer de-reference was found in the way samba kerberos server handled missing sname in TGS-REQ (Ticket Granting Server - Request)↗2022-05-24
▶
CVEList
CVE-2021-3671: A null pointer de-reference was found in the way samba kerberos server handled missing sname in TGS-REQ (Ticket Granting Server - Request)↗2021-10-12
▶
OSV
CVE-2021-3671: A null pointer de-reference was found in the way samba kerberos server handled missing sname in TGS-REQ (Ticket Granting Server - Request)↗2021-10-12
▶

📋Vendor Advisories

6
Ubuntu
Heimdal vulnerabilities↗2022-10-13
▶
Ubuntu
Samba vulnerabilities↗2021-12-06
▶
Ubuntu
Samba vulnerabilities↗2021-11-11
▶
Microsoft
A 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↗2021-10-12
▶
Red Hat
samba: Null pointer dereference on missing sname in TGS-REQ↗2021-08-31
▶
CVE-2021-3671 — NULL Pointer Dereference in Samba | cvebase