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Apache HTTP Server mod_session_crypto Vulnerability (Dec 2016) - Linux
Information
Severity
Severity
Family
Family
CVSSv2 Base
CVSSv2 Base
CVSSv2 Vector
CVSSv2 Vector
Solution Type
Solution Type
Created
Created
Modified
Modified
Summary
Apache HTTP Server is prone to a vulnerability in mod_session_crypto.
Insight
Insight
mod_sessioncrypto is encrypting its data/cookie using the configured ciphers with possibly either CBC or ECB modes of operation (AES256-CBC by default), hence no selectable or builtin authenticated encryption. This makes it vulnerable to padding oracle attacks, particularly with CBC. An authentication tag (SipHash MAC) is now added to prevent such attacks.
Affected Software
Affected Software
Apache HTTP Server version 2.4.1 through 2.4.23.
Detection Method
Detection Method
Checks if a vulnerable version is present on the target host.
Solution
Solution
Update to version 2.4.25 or later.