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nginx 0.6.18 - 1.20.0 1-byte Memory Overwrite Vulnerability
Information
Severity
Severity
Family
Family
CVSSv2 Base
CVSSv2 Base
CVSSv2 Vector
CVSSv2 Vector
Solution Type
Solution Type
Created
Created
Modified
Modified
Summary
nginx is prone to a 1-byte memory overwrite vulnerability.
Insight
Insight
A security issue in nginx resolver was identified, which might allow an attacker to cause 1-byte memory overwrite by using a specially crafted DNS response, resulting in worker process crash or, potentially, in arbitrary code execution.
Affected Software
Affected Software
nginx version 0.6.18 through 1.20.0. Note: The issue only affects nginx if the 'resolver' directive is used in the configuration file. Further, the attack is only possible if an attacker is able to forge UDP packets from the DNS server.
Detection Method
Detection Method
Checks if a vulnerable version is present on the target host.
Solution
Solution
Update to version 1.20.1, 1.21.0 or later.