Bad (EC)DHE parameters cause a client crash
Vulnerability Description
In OpenSSL 1.1.0 before 1.1.0d, if a malicious server supplies bad parameters for a DHE or ECDHE key exchange then this can result in the client attempting to dereference a NULL pointer leading to a client crash. This could be exploited in a Denial of Service attack.
Impact Analysis
Refer to official advisory for detailed impact metrics.
Remediation
Ensure systems are updated to the latest vendor-supplied patch levels.
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Credits & Attribution
The following person or organization is credited with identifying this vulnerability, as recorded in the NVD database:
- Guido Vranken
References
- http://www.oracle.com/technetwork/security-advisory/cpujan2018-3236628.html
- https://www.exploit-db.com/exploits/41192/
- http://www.securityfocus.com/bid/95812
- https://github.com/openssl/openssl/commit/efbe126e3ebb9123ac9d058aa2bb044261342aaa
- https://www.openssl.org/news/secadv/20170126.txt
- http://www.securitytracker.com/id/1037717
- http://www.oracle.com/technetwork/security-advisory/cpuoct2017-3236626.html
- https://security.gentoo.org/glsa/201702-07
- https://support.hpe.com/hpsc/doc/public/display?docLocale=en_US&docId=emr_na-hpesbhf03838en_us
- https://www.oracle.com/technetwork/security-advisory/cpuapr2019-5072813.html
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OpenSSL
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Timeline
CVSS Vectors
Weaknesses (CWE)
No CWE data available
MITRE ATT&CK TTPs
No associated TTPs found for this vulnerability.