CVE-2021-3671

Aliases:DEBIAN-CVE-2021-3671ALPINE-CVE-2021-3671
Advisory lineage Upstream: 0 Downstream: 12
Modified
Published: 12 Oct 2021, 00:00
Last modified:03 Aug 2024, 17:01

Vulnerability Summary

Overall Risk (default)
medium
26/100
CVSS Score
6.5 MEDIUM
v3.1 (nvd)
EPSS Score
2.18% LOW
2% probability +0.70%
KEV
Not listed
Ransomware
No reports
Public exploits
None found
Dark Web
Not detected

Timeline

12 Oct 2021, 00:00
Published
Vulnerability first disclosed
03 Aug 2024, 17:01
Last Modified
Vulnerability information updated

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 Metrics

  • v3.1•MEDIUM•Score: 6.5CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
  • v2.0•MEDIUM•Score: 4AV:N/AC:L/Au:S/C:N/I:N/A:P

EPSS Trends

Current EPSS score: 2.18%• Percentile: 82%

Techniques & Countermeasures

  • CWE-476•NULL Pointer Dereference

    The product dereferences a pointer that it expects to be valid but is NULL.

Affected Systems

  • alpine•heimdal

    < 7.7.1-r0 | < 7.7.1-r0 | < 7.7.1-r0 | < 7.7.1-r0 | < 7.7.1-r0 | < 7.7.1-r0 | < 7.7.1-r0 | < 7.7.1-r0 | < 7.7.1-r0 | < 7.7.1-r0 | < 7.7.1-r0

  • alpine•samba

    ≥ 4.14.0, < 4.14.8-r0 | ≥ 4.14.0, < 4.15.0-r0 | ≥ 4.14.0, < 4.15.0-r0 | ≥ 4.14.0, < 4.15.0-r0 | ≥ 4.14.0, < 4.15.0-r0 | ≥ 4.14.0, < 4.15.0-r0 | ≥ 4.14.0, < 4.15.0-r0 | ≥ 4.14.0, < 4.15.0-r0 | ≥ 4.14.0, < 4.15.0-r0 | ≥ 4.14.0, < 4.15.0-r0 | ≥ 4.14.0, < 4.15.0-r0

  • debian•heimdal

    < 7.7.0+dfsg-2+deb11u2 | < 7.7.0+dfsg-3 | < 7.7.0+dfsg-3 | < 7.7.0+dfsg-3

  • debian•samba

    < 2:4.13.13+dfsg-1~deb11u1 | < 2:4.13.13+dfsg-1 | < 2:4.13.13+dfsg-1 | < 2:4.13.13+dfsg-1

  • debian•debian_linux

    10.0 | 11.0

  • netapp•management_services_for_element_software

    na

  • netapp•management_services_for_netapp_hci

    na

  • netapp•ontap_select_deploy_administration_utility

    na

  • samba•samba

    < 4.13.12 | ≥ 4.14.0, < 4.14.8

References (9)