Vulnerability CVE-2019-1559

Published: 2019-02-27   Modified: 2019-02-28

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).



(Information Exposure)

CVSS2 => (AV:N/AC:M/Au:N/C:P/I:N/A:N)

CVSS Base Score
Impact Subscore
Exploitability Subscore
Exploit range
Attack complexity
No required
Confidentiality impact
Integrity impact
Availability impact
Affected software
Tenable -> Nessus 
Opensuse -> LEAP 
Openssl -> Openssl 
Netapp -> Snapcenter 
Netapp -> Storage automation store 
Netapp -> Oncommand unified manager 
Netapp -> Oncommand workflow automation 
Netapp -> Ontap select deploy 
Netapp -> Snapdrive 
Netapp -> Storagegrid 
Netapp -> Element software 
Netapp -> Hyper converged infrastructure 
Netapp -> Ontap select deploy administration utility 
Netapp -> Santricity smi-s provider 
Netapp -> Steelstore cloud integrated storage 
F5 -> Traffix signaling delivery controller 
Debian -> Debian linux 
Canonical -> Ubuntu linux 


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