CVEvulnerability
CVE-2018-16841
6.5 MEDIUM
Official page ↗
- Status
- Modified
- Published
- 2018-11-28
- Last modified
- 2026-06-17
- Assigner
- [email protected]
- CVSS 3.1 ([email protected])
- 6.5 MEDIUM — CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
- CVSS 3.0 ([email protected])
- 5.7 MEDIUM — CVSS:3.0/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:N/A:H
- CVSS 2.0 ([email protected])
- 4.0 MEDIUM — AV:N/AC:L/Au:S/C:N/I:N/A:P
- Weaknesses
- CWE-415, CWE-416
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.
Affected configurations
• samba samba (>= 4.3.0 < 4.7.12)
• samba samba (>= 4.8.0 < 4.8.7)
• samba samba (>= 4.9.0 < 4.9.3)
• 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
Related
References
- http://www.securityfocus.com/bid/106023 Third Party Advisory, VDB Entry
- https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-16841 Issue Tracking, Third Party Advisory
- https://security.gentoo.org/glsa/202003-52 Third Party Advisory
- https://security.netapp.com/advisory/ntap-20181127-0001/ Third Party Advisory
- https://usn.ubuntu.com/3827-1/ Third Party Advisory
- https://usn.ubuntu.com/3827-2/ Third Party Advisory
- https://www.debian.org/security/2018/dsa-4345 Third Party Advisory
- https://www.samba.org/samba/security/CVE-2018-16841.html Patch, Vendor Advisory
- http://www.securityfocus.com/bid/106023 Third Party Advisory, VDB Entry
- https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-16841 Issue Tracking, Third Party Advisory
- https://security.gentoo.org/glsa/202003-52 Third Party Advisory
- https://security.netapp.com/advisory/ntap-20181127-0001/ Third Party Advisory
- https://usn.ubuntu.com/3827-1/ Third Party Advisory
- https://usn.ubuntu.com/3827-2/ Third Party Advisory
- https://www.debian.org/security/2018/dsa-4345 Third Party Advisory
- https://www.samba.org/samba/security/CVE-2018-16841.html Patch, Vendor Advisory