MGASA-2019-0106 - Updated openssl packages fix security vulnerability

Publication date: 07 Mar 2019
URL: https://advisories.mageia.org/MGASA-2019-0106.html
Type: security
Affected Mageia releases: 6
CVE: 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
(CVE-2019-1559).

References:
- https://bugs.mageia.org/show_bug.cgi?id=24434
- https://www.openssl.org/news/secadv/20190226.txt
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-1559

SRPMS:
- 6/core/openssl-1.0.2r-1.mga6

Mageia 2019-0106: openssl security update

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://www.openssl.org/news/secadv/20190226.txt

- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-1559

Resolution

MGASA-2019-0106 - Updated openssl packages fix security vulnerability

SRPMS

- 6/core/openssl-1.0.2r-1.mga6

Severity
Publication date: 07 Mar 2019
URL: https://advisories.mageia.org/MGASA-2019-0106.html
Type: security
CVE: CVE-2019-1559

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