cve/2016/CVE-2016-0701.md

### [CVE-2016-0701](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2016-0701)
![](https://img.shields.io/static/v1?label=Product&message=n%2Fa&color=blue)
![](https://img.shields.io/static/v1?label=Version&message=%3D%20n%2Fa%20&color=brighgreen)
![](https://img.shields.io/static/v1?label=Vulnerability&message=n%2Fa&color=brighgreen)

### Description

The DH_check_pub_key function in crypto/dh/dh_check.c in OpenSSL 1.0.2 before 1.0.2f does not ensure that prime numbers are appropriate for Diffie-Hellman (DH) key exchange, which makes it easier for remote attackers to discover a private DH exponent by making multiple handshakes with a peer that chose an inappropriate number, as demonstrated by a number in an X9.42 file.

### POC

#### Reference
- http://www.oracle.com/technetwork/security-advisory/cpujul2016-2881720.html
- http://www.oracle.com/technetwork/security-advisory/cpuoct2017-3236626.html
- http://www.securityfocus.com/bid/91787
- https://www.kb.cert.org/vuls/id/257823
- https://www.oracle.com/security-alerts/cpuapr2020.html
- https://www.oracle.com/security-alerts/cpujan2020.html
- https://www.oracle.com/security-alerts/cpujul2020.html
- https://www.oracle.com/security-alerts/cpuoct2020.html

#### Github
- https://github.com/ARPSyndicate/cvemon
- https://github.com/Live-Hack-CVE/CVE-2017-3738
- https://github.com/RClueX/Hackerone-Reports
- https://github.com/chnzzh/OpenSSL-CVE-lib
- https://github.com/erwinchang/utility-library
- https://github.com/forget-eve/NSP
- https://github.com/imhunterand/hackerone-publicy-disclosed
- https://github.com/luanjampa/cve-2016-0701