SB2021010413 - MitM attack in Samba Rsync
Published: January 4, 2021 Updated: May 1, 2023
Security Bulletin ID
SB2021010413
CSH Severity
Medium
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Remote access
Highest impact
Data manipulation
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Improper validation of certificate with host mismatch (CVE-ID: CVE-2020-14387)
CWE-ID: CWE-297 - Improper Validation of Certificate with Host Mismatch
CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Green
The vulnerability allows a remote attacker to perform MitM attack.
The vulnerability exists in Samba rsync due to the application does not verify the hostname in the server certificate in openssl mode. A remote attacker can supply any valid certificate for another hostname and intercept the traffic.
Remediation
Install update from vendor's website.