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CVE-2019-14833

Status Candidate

Overview

A flaw was found in Samba, all versions starting samba 4.5.0 before samba 4.9.15, samba 4.10.10, samba 4.11.2, in the way it handles a user password change or a new password for a samba user. The Samba Active Directory Domain Controller can be configured to use a custom script to check for password complexity. This configuration can fail to verify password complexity when non-ASCII characters are used in the password, which could lead to weak passwords being set for samba users, making it vulnerable to dictionary attacks.

Related Files

Ubuntu Security Notice USN-4167-1
Posted Oct 29, 2019
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 4167-1 - Michael Hanselmann discovered that the Samba client code incorrectly handled path separators. If a user were tricked into connecting to a malicious server, a remote attacker could use this issue to cause the client to access local pathnames instead of network pathnames. Simon Fonteneau and Bjoern Baumbach discovered that Samba incorrectly handled the check password script. This issue could possibly bypass custom password complexity checks, contrary to expectations. This issue only affected Ubuntu 18.04 LTS, Ubuntu 19.04, and Ubuntu 19.10. Various other issues were also addressed.

tags | advisory, remote, local
systems | linux, ubuntu
advisories | CVE-2019-10218, CVE-2019-14833, CVE-2019-14847
SHA-256 | ef19bb6d0495cb9e8b6742c4abe83117b6c43a9bc24e0152f873865b854071c3
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