Mageia: 2019-0106 Moderate: OpenSSL Padding Oracle Attack
mageia
March 7, 2019
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 ...
Summary
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
(CVE-2019-1559).
References
- https://bugs.mageia.org/show_bug.cgi?id=24434
- https://openssl-library.org/news/secadv/20190226.txt
- https://www.cve.org/CVERecord?id=CVE-2019-1559
Topics Covered
Resolution
SRPMS
- 6/core/openssl-1.0.2r-1.mga6
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Severity
important
Lowest
Low
Medium
High
Critical
Publication date: 07 Mar 2019
URL: https://advisories.mageia.org/MGASA-2019-0106.html
Type: security
CVE: CVE-2019-1559
Topics Covered
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