CVE-2017-3730
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.
Does this matter?
EPSS puts the probability of exploitation in the next 30 days at 55.3%, higher than 99% of all known CVEs. Patch or mitigate before the next change window.
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.
- CVSS 3.0
- 7.5 HIGHCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- EPSS
- 55.29% probability · 99th percentile
- Public exploits
- 1 in Exploit-DB · first 26 January 2017
- CISA KEV
- Not listed
- Weakness
- CWE-476
- Affected
- openssl/openssl · oracle/agile engineering data management · oracle/communications application session controller · oracle/communications eagle lnp application processor · oracle/communications operations monitor · oracle/jd edwards enterpriseone tools · oracle/jd edwards world security
- Source
- openssl-security@openssl.org
EPSS moved from 49.9% on 21 September 2026 to 55.3% on 27 October 2026. The dashed line is the ten per cent mark our analysts treat as “patch before the next change window”.
Public exploits (1)
Entries in Exploit-DB that cite this CVE. Links go to the Exploit-DB page and to the file in the public repository; nothing is hosted here. A verified tick means the Exploit-DB team confirmed the exploit works against the stated version.
References
- http://www.oracle.com/technetwork/security-advisory/cpujan2018-3236628.htmlPatch
- http://www.oracle.com/technetwork/security-advisory/cpuoct2017-3236626.htmlPatch
- http://www.securityfocus.com/bid/95812Broken Link, Third Party Advisory, VDB Entry
- http://www.securitytracker.com/id/1037717Third Party Advisory, VDB Entry
- https://github.com/openssl/openssl/commit/efbe126e3ebb9123ac9d058aa2bb044261342aaaPatch, Third Party Advisory
- https://security.gentoo.org/glsa/201702-07Third Party Advisory
- https://support.hpe.com/hpsc/doc/public/display?docLocale=en_US&docId=emr_na-hpesbhf03838en_usThird Party Advisory
- https://www.exploit-db.com/exploits/41192/Exploit, Third Party Advisory, VDB Entry
- https://www.openssl.org/news/secadv/20170126.txtPatch, Vendor Advisory
- https://www.oracle.com/technetwork/security-advisory/cpuapr2019-5072813.htmlPatch
- http://www.oracle.com/technetwork/security-advisory/cpujan2018-3236628.htmlPatch
- http://www.oracle.com/technetwork/security-advisory/cpuoct2017-3236626.htmlPatch
- http://www.securityfocus.com/bid/95812Broken Link, Third Party Advisory, VDB Entry
- http://www.securitytracker.com/id/1037717Third Party Advisory, VDB Entry
- https://github.com/openssl/openssl/commit/efbe126e3ebb9123ac9d058aa2bb044261342aaaPatch, Third Party Advisory
- https://security.gentoo.org/glsa/201702-07Third Party Advisory
- https://support.hpe.com/hpsc/doc/public/display?docLocale=en_US&docId=emr_na-hpesbhf03838en_usThird Party Advisory
- https://www.exploit-db.com/exploits/41192/Exploit, Third Party Advisory, VDB Entry
- https://www.openssl.org/news/secadv/20170126.txtPatch, Vendor Advisory
- https://www.oracle.com/technetwork/security-advisory/cpuapr2019-5072813.htmlPatch
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.