SB2019072131 - Input validation error in knot-resolver (Alpine package)
Published: July 21, 2019
Security Bulletin ID
SB2019072131
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 security vulnerability.
1) Input validation error (CVE-ID: CVE-2019-10191)
The vulnerability allows a remote attacker to hijack domain on the target system.
The vulnerability exists due to insufficient validation of user-supplied input in DNS resolver. A remote attacker can downgrade DNSSEC-secure domains to DNSSEC-insecure state, opening possibility of domain hijack using attacks against insecure DNS protocol.
Remediation
Install update from vendor's website.