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Amazon Linux Local Check: alas-2016-750
Information
Severity
Severity
Medium
Family
Family
Amazon Linux Local Security Checks
CVSSv2 Base
CVSSv2 Base
4.3
CVSSv2 Vector
CVSSv2 Vector
AV:N/AC:M/Au:N/C:P/I:N/A:N
Solution Type
Solution Type
Vendor Patch
Created
Created
7 years ago
Modified
Modified
5 years ago
Summary
Amazon Linux Local Security Checks
Insight
Insight
Ciphers with 64-bit block sizes used in CBC mode were found to be vulnerable to a birthday attack when key renegotiation doesn't happen frequently or at all in long running connections. The blowfish cipher as used in OpenVPN by default is vulnerable to this attack, allowing a remote attacker to recover partial plaintext information (XOR of two plaintext blocks).
Solution
Solution
Run yum update openvpn to update your system.