CVE-2019-1559 - OpenSSL Security Bypass Vulnerability

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Article ID: 128510

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Updated On:

Products

CA Infrastructure Management CA Infrastructure Management CA Performance Management - Usage and Administration CA Performance Management - Data Polling

Issue/Introduction



Need to know if CAPM is affected by CVE-2019-1559:

STIG Finding Severity: Category I CVEs: CVE-2019-1559 CVE-2019-1559: If an application encounters a fatal protocol error and then calls SSL_shutdown() twice (once to send a close_notify, and once to receive one) then OpenSSL can respond differently to the calling application if a 0 byte record is received with invalid padding compared to if a 0 byte record is received with an invalid MAC. If the application then behaves differently based on that in a way that is detectable to the remote peer, then this amounts to a padding oracle that could be used to decrypt data. In order for this to be exploitable "non-stitched" ciphersuites must be in use. Stitched ciphersuites are optimised implementations of certain commonly used ciphersuites. Also the application must call SSL_shutdown() twice even if a protocol error has occurred (applications should not do this but some do anyway). Fixed in OpenSSL 1.0.2r (Affected 1.0.2-1.0.2q).

Environment

CAPM 3.5

Resolution

We don't use OpenSSL for CAPM.  Jetty does all it's own HTTP communication via java.  Openssl is an OS installed tool, not a CAPM installed tool.  The CVE notes " Fixed in OpenSSL 1.0.2r (Affected 1.0.2-1.0.2q)."  So you would work with your Linux admin to upgrade OpenSSL