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MatrixSSL (GUARD TLS-TK) Side-Channel Attack Vulnerability
Information
Severity
Severity
Low
Family
Family
SSL and TLS
CVSSv2 Base
CVSSv2 Base
1.9
CVSSv2 Vector
CVSSv2 Vector
AV:L/AC:M/Au:N/C:P/I:N/A:N
Solution Type
Solution Type
Vendor Patch
Created
Created
5 years ago
Modified
Modified
5 years ago
Summary
GUARD TLS-TK (formerly MatrixSSL) is vulnerable to a Memory-Cache Side-Channel attack.
Insight
Insight
The flaw is located in the code that computes signature component 's'. In many libraries, the code that performs modular addition does not run in constant time, and so a side channel can recover information that can be used to calculate the private key.
Affected Software
Affected Software
MatrixSSL through version 3.9.5.
Detection Method
Detection Method
Checks if a vulnerable version is present on the target host.
Solution
Solution
Update to version 3.9.6 once released. Contact the vendor at support@matrixssl.org to get a fix until then.