CVE-2018-16841 (GCVE-0-2018-16841)

Vulnerability from cvelistv5 – Published: 2018-11-28 14:00 – Updated: 2024-08-05 10:32
VLAI?
Summary
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.
Severity ?
5.7 (Medium)
CVSS:3.0/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:N/A:H
CWE
Assigner
References
URL Tags
http://www.securityfocus.com/bid/106023 vdb-entryx_refsource_BID
https://usn.ubuntu.com/3827-2/ vendor-advisoryx_refsource_UBUNTU
https://usn.ubuntu.com/3827-1/ vendor-advisoryx_refsource_UBUNTU
https://security.netapp.com/advisory/ntap-2018112… x_refsource_CONFIRM
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2… x_refsource_CONFIRM
https://www.debian.org/security/2018/dsa-4345 vendor-advisoryx_refsource_DEBIAN
https://www.samba.org/samba/security/CVE-2018-168… x_refsource_CONFIRM
https://security.gentoo.org/glsa/202003-52 vendor-advisoryx_refsource_GENTOO
Impacted products
Vendor Product Version
[UNKNOWN] samba Affected: 4.7.12
Affected: 4.8.7
Affected: 4.9.3
Create a notification for this product.
Date Public ?
2018-11-28 00:00
Show details on NVD website
To clipboard 

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Cuando se configura para aceptar la autenticaci\u00f3n por smartcard, el KDC de Samba llamar\u00e1 a talloc_free() dos veces en la misma memoria si la entidad de seguridad en un certificado firmado de forma v\u00e1lida no coincide con la entidad en AS-REQ. 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}