SB2018091117 - Denial of service in dnsdist
Published: September 11, 2018 Updated: July 3, 2023
Security Bulletin ID
SB2018091117
Severity
Medium
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Remote access
Highest impact
Denial of service
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 security vulnerability.
1) Input validation error (CVE-ID: CVE-2016-7069)
The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists in the way EDNS0 OPT records are handled when parsing responses from a backend. When dnsdist is configured to add EDNS Client Subnet to a query, the response may contain an EDNS0 OPT record that has to be removed before forwarding the response to the initial client.
Remediation
Install update from vendor's website.