Detections
Analytics
Alpine: multiple ldb packages, multiple samba packages, pam-winbind: security update to 4.8.7-r0
medium Tenable Cloud Security Plugin ID 424469
Description
There are packages installed that are affected by multiple vulnerabilities referenced in the following CVEs:- 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. (CVE-2018-16841)
- Samba from version 4.0.0 and before versions 4.7.12, 4.8.7, 4.9.3 is vulnerable to a denial of service.
During the processing of an LDAP search before Samba's AD DC returns the LDAP entries to the client, the
entries are cached in a single memory object with a maximum size of 256MB. When this size is reached, the
Samba process providing the LDAP service will follow the NULL pointer, terminating the process. There is
no further vulnerability associated with this issue, merely a denial of service. (CVE-2018-16851)
- Samba from version 4.7.0 has a vulnerability that allows a user in a Samba AD domain to crash the KDC when
Samba is built in the non-default MIT Kerberos configuration. With this advisory the Samba Team clarify
that the MIT Kerberos build of the Samba AD DC is considered experimental. Therefore the Samba Team will
not issue security patches for this configuration. Additionally, Samba 4.7.12, 4.8.7 and 4.9.3 have been
issued as security releases to prevent building of the AD DC with MIT Kerberos unless --with-experimental-
mit-ad-dc is specified to the configure command. (CVE-2018-16853)
See Also
https://security.alpinelinux.org/vuln/CVE-2018-16841
Plugin Details
Severity: Medium
ID: 424469
Version: Revision 1.8
Type: Local
Published: 4/4/2025
Updated: 7/2/2026
Supported Sensors: Agentless Assessment, Tenable Cloud Security, Tenable Self-Hosted Container Security
Risk Information
VPR
Risk Factor: Low
Score: 3
Percentile: 23.18
CVSS v2
Risk Factor: Medium
Base Score: 4.3
Temporal Score: 3.2
Vector: CVSS2#AV:N/AC:M/Au:N/C:N/I:N/A:P
CVSS Score Source: CVE-2018-16853
CVSS v3
Risk Factor: Medium
Base Score: 6.5
Temporal Score: 5.7
Vector: CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C
CVSS Score Source: CVE-2018-16851
Vulnerability Information
Exploit Ease: No known exploits are available
Vulnerability Publication Date: 11/27/2018
Reference Information
CVE: CVE-2018-16841, CVE-2018-16851, CVE-2018-16853
IAVA: 2018-A-0384-S