CVE-2019-1559 vulnerability in F5 Networks and Other Products
Published on February 27, 2019
0-byte record padding oracle
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).
Vendor Advisory
Vendor Advisory
Vendor Advisory
Vendor Advisory
Vendor Advisory
Vendor Advisory
Vendor Advisory
Vendor Advisory
Vendor Advisory
Vendor Advisory
Vendor Advisory
Vendor Advisory
Vendor Advisory
Vendor Advisory
Vendor Advisory
Vendor Advisory
Vendor Advisory
Vendor Advisory
Vendor Advisory
NVD
Products Associated with CVE-2019-1559
You can be notified by email with stack.watch whenever vulnerabilities like CVE-2019-1559 are published in these products:
Affected Versions
OpenSSL Version Fixed in OpenSSL 1.0.2r (Affected 1.0.2-1.0.2q) is affected by CVE-2019-1559Exploit Probability
EPSS
4.96%
Percentile
89.46%
EPSS (Exploit Prediction Scoring System) scores estimate the probability that a vulnerability will be exploited in the wild within the next 30 days. The percentile shows you how this score compares to all other vulnerabilities.