CVE-2018-16841

CVSS V2 Medium 4 CVSS V3 Medium 6.5
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.
Overview
  • CVE ID
  • CVE-2018-16841
  • Assigner
  • secalert@redhat.com
  • Vulnerability Status
  • Analyzed
  • Published Version
  • 2018-11-28T14:29:00
  • Last Modified Date
  • 2022-08-29T20:04:01
Weakness Enumerations
CWE URL
CWE-415 http://cwe.mitre.org/data/definitions/415.html
CPE Configuration (Product)
CPE Vulnerable Operator Version Start Version End
cpe:2.3:a:samba:samba:*:*:*:*:*:*:*:* 1 OR 4.3.0 4.7.12
cpe:2.3:a:samba:samba:*:*:*:*:*:*:*:* 1 OR 4.8.0 4.8.7
cpe:2.3:a:samba:samba:*:*:*:*:*:*:*:* 1 OR 4.9.0 4.9.3
cpe:2.3:o:canonical:ubuntu_linux:12.04:*:*:*:esm:*:*:* 1 OR
cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:lts:*:*:* 1 OR
cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:lts:*:*:* 1 OR
cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:* 1 OR
cpe:2.3:o:canonical:ubuntu_linux:18.10:*:*:*:*:*:*:* 1 OR
cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:* 1 OR
CVSS Version 2
  • Version
  • 2.0
  • Vector String
  • AV:N/AC:L/Au:S/C:N/I:N/A:P
  • Access Vector
  • NETWORK
  • Access Compatibility
  • LOW
  • Authentication
  • SINGLE
  • Confidentiality Impact
  • NONE
  • Integrity Impact
  • NONE
  • Availability Impact
  • PARTIAL
  • Base Score
  • 4
  • Severity
  • MEDIUM
  • Exploitability Score
  • 8
  • Impact Score
  • 2.9
CVSS Version 3
  • Version
  • 3.1
  • Vector String
  • CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
  • Attack Vector
  • NETWORK
  • Attack Compatibility
  • LOW
  • Privileges Required
  • LOW
  • User Interaction
  • NONE
  • Scope
  • UNCHANGED
  • Confidentiality Impact
  • NONE
  • Availability Impact
  • HIGH
  • Base Score
  • 6.5
  • Base Severity
  • MEDIUM
  • Exploitability Score
  • 2.8
  • Impact Score
  • 3.6
References
Reference URL Reference Tags
https://www.samba.org/samba/security/CVE-2018-16841.html Patch Vendor Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-16841 Issue Tracking Third Party Advisory
https://www.debian.org/security/2018/dsa-4345 Third Party Advisory
https://usn.ubuntu.com/3827-2/ Third Party Advisory
https://usn.ubuntu.com/3827-1/ Third Party Advisory
https://security.netapp.com/advisory/ntap-20181127-0001/ Third Party Advisory
http://www.securityfocus.com/bid/106023 VDB Entry Third Party Advisory
https://security.gentoo.org/glsa/202003-52
Sources
Source Name Source URL
NIST https://nvd.nist.gov/vuln/detail/CVE-2018-16841
MITRE https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-16841
History
Created Old Value New Value Data Type Notes
2022-05-10 17:06:02 Added to TrackCVE
2022-12-03 14:47:23 2018-11-28T14:29Z 2018-11-28T14:29:00 CVE Published Date updated
2022-12-03 14:47:23 2022-08-29T20:04:01 CVE Modified Date updated
2022-12-03 14:47:23 Analyzed Vulnerability Status updated