Double Free The advisory has been revoked - it doesn't affect any version of package samba (opens in a new tab)
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-UBUNTU1204-SAMBA-357444
- published2 Dec 2018
- disclosed28 Nov 2018
Introduced: 28 Nov 2018
CVE-2018-16841 (opens in a new tab)Amendment
The Ubuntu security team deemed this advisory irrelevant for Ubuntu:12.04.
NVD Description
Note: Versions mentioned in the description apply only to the upstream samba package and not the samba package as distributed by Ubuntu.
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
- http://people.ubuntu.com/~ubuntu-security/cve/CVE-2018-16841
- https://www.samba.org/samba/security/CVE-2018-16841.html
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-16841
- https://www.debian.org/security/2018/dsa-4345
- https://security-tracker.debian.org/tracker/CVE-2018-16841
- https://security.gentoo.org/glsa/202003-52
- https://security.netapp.com/advisory/ntap-20181127-0001/
- https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-16841
- http://www.securityfocus.com/bid/106023
- https://usn.ubuntu.com/3827-1/
- https://usn.ubuntu.com/3827-2/