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CVE-2018-16841

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CVE-2018-16841

Published: Nov 28, 2018

Modified: Aug 5, 2024

PUBLISHED

CVSS v3.0

5.7

MEDIUM

Description

Samba from version 4.3.0 and before versions 4.7.12, 4.8.7 and 4.9.3 are vulnerable to a denial of service. When configured to accept smart-card authentication, Samba's KDC will call talloc_free() twice on the same memory if the principal in a validly signed certificate does not match the principal in the AS-REQ. This is only possible after authentication with a trusted certificate. talloc is robust against further corruption from a double-free with talloc_free() and directly calls abort(), terminating the KDC process.

VendorProductVersions

[UNKNOWN]

samba

affected
4.7.12
affected
4.8.7
affected
4.9.3

Weaknesses (CWE)

CWE-416

CVSS v3.0 Details

CVSS v3.0 Vector

CVSS:3.0/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:N/A:H

Attack Vector

Network

Attack Complexity

Low

Privileges Required

Low

User Interaction

Required

Scope

Unchanged

Confidentiality

None

Integrity

None

Availability

High

References

106023
vdb-entry
x_refsource_BID
USN-3827-2
vendor-advisory
x_refsource_UBUNTU
USN-3827-1
vendor-advisory
x_refsource_UBUNTU
DSA-4345
vendor-advisory
x_refsource_DEBIAN
GLSA-202003-52
vendor-advisory
x_refsource_GENTOO

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