SB2019110304 - Arch Linux update for samba
Published: November 3, 2019
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 3 secuirty vulnerabilities.
1) Path traversal (CVE-ID: CVE-2019-10218)
The vulnerability allows a remote attacker to perform directory traversal attacks.
The vulnerability exists due to input validation error when processing directory traversal sequences in filenames within Samba client code (libsmbclient). A malicious SMB server can return a filename to the client containing directory traversal characters and force the client to read or write data to local files.
Successful exploitation of the vulnerability may allow an attacker to overwrite arbitrary files on the client.
2) Use of Obsolete Function (CVE-ID: CVE-2019-14833)
The vulnerability allows a remote attacker to bypass implemented password policy.
The vulnerability exists due to Samba does not pass the entire user's password when configured to use custom command to verify password complexity, if the password contains multibyte non-ACSII characters. A remote authenticated user can bypass implemented password policy and create weak passwords.
3) NULL pointer dereference (CVE-ID: CVE-2019-14847)
The vulnerability allows a remote user to perform a denial of service (DoS) attack.
The vulnerability exists due to a NULL pointer dereference error within implementation of the MS-ADTS "3.1.1.3.1.3.3 Range Retrieval of Attribute Values" feature. A remote user with "get changes" extended access right can trigger NULL pointer dereference error and perform a denial of service (DoS) attack.
Remediation
Install update from vendor's website.