CVE-2015-1787: Input Validation
First published: Mon Mar 16 2015(Updated: )
If client authentication is used, then a server can crash with a segmentation fault in the event of a DHE ciphersuite being selected and a zero length ClientKeyExchange (CKE) message being sent by the client. This could be exploited in a denial of service attack. This issue affects OpenSSL version 1.0.2, and is fixed in version 1.0.2a. Acknowledgements: Red Hat would like to thank the OpenSSL project for reporting this issue. Upstream acknowledges Matt Caswell of the OpenSSL development team as the original reporter.
Credit: secalert@redhat.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| redhat/openssl | <1.0.2 | 1.0.2 |
| OpenSSL libcrypto | =1.0.2 | |
| OpenSSL libcrypto | =1.0.2-beta1 | |
| OpenSSL libcrypto | =1.0.2-beta2 | |
| OpenSSL libcrypto | =1.0.2-beta3 |
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Reference Links
- https://openssl.org/news/secadv_20150319.txt
- https://access.redhat.com/articles/1384453
- https://git.openssl.org/?p=openssl.git;a=commitdiff;h=b19d8143212ae5fbc9cebfd51c01f802fabccd33
- https://bugzilla.redhat.com/show_bug.cgi?id=1202406
- http://marc.info/?l=bugtraq&m=143748090628601&w=2
- http://marc.info/?l=bugtraq&m=144050155601375&w=2
- http://marc.info/?l=bugtraq&m=144050297101809&w=2
- http://www.oracle.com/technetwork/security-advisory/cpuoct2017-3236626.html
- http://www.oracle.com/technetwork/topics/security/bulletinapr2015-2511959.html
- http://www.oracle.com/technetwork/topics/security/cpujan2016-2367955.html
- http://www.oracle.com/technetwork/topics/security/cpujul2015-2367936.html
- http://www.oracle.com/technetwork/topics/security/cpuoct2015-2367953.html
- http://www.securityfocus.com/bid/73238
- http://www.securitytracker.com/id/1031929
- https://bto.bluecoat.com/security-advisory/sa92
- https://cert-portal.siemens.com/productcert/pdf/ssa-412672.pdf
- https://git.openssl.org/?p=openssl.git;a=commit;h=b19d8143212ae5fbc9cebfd51c01f802fabccd33
- https://kc.mcafee.com/corporate/index?page=content&id=SB10110
- https://security.gentoo.org/glsa/201503-11
- https://www.openssl.org/news/secadv_20150319.txt
Frequently Asked Questions
What is the severity of CVE-2015-1787?
CVE-2015-1787 has a severity rating that indicates it can lead to a denial of service attack due to server crashes.
How do I fix CVE-2015-1787?
To fix CVE-2015-1787, upgrade OpenSSL to version 1.0.2 or later.
What versions of OpenSSL are affected by CVE-2015-1787?
CVE-2015-1787 affects OpenSSL versions 1.0.2, 1.0.2-beta1, 1.0.2-beta2, and 1.0.2-beta3.
What type of attack can exploit CVE-2015-1787?
CVE-2015-1787 can be exploited in a denial of service attack leading to service interruption.
What causes the crash in CVE-2015-1787?
The crash in CVE-2015-1787 is caused by a segmentation fault triggered when a zero length ClientKeyExchange message is sent by the client.
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