Medium severity · published Oct 12, 2021
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)
6.5
CVSS
2.1%
EPSS
No
On KEV
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:H
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
None
Integrity
None
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)2.1% · higher than 82% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
DL
Debian Linux · Debian
10.0; 11.0 · source: NVD
MS
Management Services For Element Software · Netapp
All versions, or not specified · source: NVD
MS
Management Services For Netapp Hci · Netapp
All versions, or not specified · source: NVD
OS
Ontap Select Deploy Administration Utility · Netapp
All versions, or not specified · source: NVD
SA
Samba · Samba
before 4.13.12; 4.14.0 before 4.14.8 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2021-3671
CVE.org
https://www.cve.org/CVERecord?id=CVE-2021-3671
bugzilla.redhat.com
https://bugzilla.redhat.com/show_bug.cgi?id=2013080%2C
bugzilla.samba.org
https://bugzilla.samba.org/show_bug.cgi?id=14770%2C
Patch
https://github.com/heimdal/heimdal/commit/04171147948d0a3636bc6374181926f0fb2ec83a
Mailing List
https://lists.debian.org/debian-lts-announce/2022/11/msg00034.html
Third Party Advisory
https://security.netapp.com/advisory/ntap-20221215-0002/
Third Party Advisory
https://security.netapp.com/advisory/ntap-20230216-0008/
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