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VULNERABILITIES

CVE-2019-1559 Details

Description

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).

Metrics

CVSS 3.x Severity and Vector Strings:

References to Advisories, Solutions, and Tools

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URLSource(s)Tag(s)
http://lists.opensuse.org/opensuse-security-announce/2019-03/msg00041.html CVEMailing ListThird Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2019-04/msg00019.html CVEMailing ListThird Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2019-04/msg00046.html CVEMailing ListThird Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2019-04/msg00047.html CVEMailing ListThird Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2019-05/msg00049.html CVEMailing ListThird Party Advisory

see all 72 references

Weakness Enumeration

CWE-IDCWE NameSource
CWE-203Observable Discrepancy[email protected]

Affected Products

ProductVersions

Change History

44 change records found show changes


QUICK INFO

CVE Dictionary Entry:
CVE-2019-1559
NVD Published Date:
Feb 27, 2019
NVD Last Modified:
Jun 17, 2026
Source:
[email protected]
CVE-2019-1559 Details - Not Deferred