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CVE-2018-16841

MEDIUM
Published 2018-11-28T14:00:00
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CVSS Score

V3.0
5.7
/10
CVSS:3.0/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:N/A:H
Base Score Metrics
Exploitability: N/A Impact: N/A

EPSS Score

v2025.03.14
0.068
probability
of exploitation in the wild

There is a 6.8% chance that this vulnerability will be exploited in the wild within the next 30 days.

Updated: 2025-06-25
Exploit Probability
Percentile: 0.908
Higher than 90.8% of all CVEs

Attack Vector Metrics

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
REQUIRED
Scope
UNCHANGED

Impact Metrics

Confidentiality
NONE
Integrity
NONE
Availability
HIGH

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.

Available Exploits

No exploits available for this CVE.

Related News

No news articles found for this CVE.

Affected Products

[UNKNOWN]

samba

Affected Versions:

4.7.12 4.8.7 4.9.3

GitHub Security Advisories

Community-driven vulnerability intelligence from GitHub

⚠ Unreviewed MODERATE

GHSA-q3v8-mj9m-2wq4

Advisory Details

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.

CVSS Scoring

CVSS Score

5.0

CVSS Vector

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

References

ADVISORY https://nvd.nist.gov/vuln/detail/CVE-2018-16841
WEB https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-16841
WEB https://security.gentoo.org/glsa/202003-52
WEB https://security.netapp.com/advisory/ntap-20181127-0001
WEB https://usn.ubuntu.com/3827-1
WEB https://usn.ubuntu.com/3827-2
WEB https://www.debian.org/security/2018/dsa-4345
WEB https://www.samba.org/samba/security/CVE-2018-16841.html
WEB http://www.securityfocus.com/bid/106023

Advisory provided by GitHub Security Advisory Database. Published: May 13, 2022, Modified: May 13, 2022

References

http://www.securityfocus.com/bid/106023
https://usn.ubuntu.com/3827-2/
https://usn.ubuntu.com/3827-1/
https://security.netapp.com/advisory/ntap-20181127-0001/
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-16841
https://www.debian.org/security/2018/dsa-4345
https://www.samba.org/samba/security/CVE-2018-16841.html
https://security.gentoo.org/glsa/202003-52
Published: 2018-11-28T14:00:00
Last Modified: 2024-08-05T10:32:54.002Z
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