CVE-2018-16841
MEDIUMSamba 4.3.0-4.7.11 - Denial of Service via Smart-Card Authentication Double Free
Title source: llmDescription
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.
References (8)
Core 8
Core References
Third Party Advisory, VDB Entry vdb-entry
x_refsource_bid
http://www.securityfocus.com/bid/106023
Third Party Advisory vendor-advisory
x_refsource_ubuntu
https://usn.ubuntu.com/3827-2/
Third Party Advisory vendor-advisory
x_refsource_ubuntu
https://usn.ubuntu.com/3827-1/
Third Party Advisory x_refsource_confirm
https://security.netapp.com/advisory/ntap-20181127-0001/
Issue Tracking, Third Party Advisory x_refsource_confirm
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-16841
Third Party Advisory vendor-advisory
x_refsource_debian
https://www.debian.org/security/2018/dsa-4345
Patch, Vendor Advisory x_refsource_confirm
https://www.samba.org/samba/security/CVE-2018-16841.html
Third Party Advisory vendor-advisory
x_refsource_gentoo
https://security.gentoo.org/glsa/202003-52
Scores
CVSS v3
6.5
EPSS
0.0711
EPSS Percentile
91.6%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Details
CWE
CWE-415
CWE-416
Status
published
Products (7)
canonical/ubuntu_linux
12.04
canonical/ubuntu_linux
14.04
canonical/ubuntu_linux
16.04
canonical/ubuntu_linux
18.04
canonical/ubuntu_linux
18.10
debian/debian_linux
9.0
samba/samba
4.3.0 - 4.7.12
Published
Nov 28, 2018
Tracked Since
Feb 18, 2026