cve/2016/CVE-2016-2178.md

CVE-2016-2178

Description

The dsa_sign_setup function in crypto/dsa/dsa_ossl.c in OpenSSL through 1.0.2h does not properly ensure the use of constant-time operations, which makes it easier for local users to discover a DSA private key via a timing side-channel attack.

POC

Reference

• http://eprint.iacr.org/2016/594.pdf
• http://seclists.org/fulldisclosure/2017/Jul/31
• http://www.oracle.com/technetwork/security-advisory/cpujan2018-3236628.html
• http://www.oracle.com/technetwork/security-advisory/cpujul2017-3236622.html
• http://www.oracle.com/technetwork/security-advisory/cpuoct2016-2881722.html
• http://www.oracle.com/technetwork/security-advisory/cpuoct2017-3236626.html
• http://www.oracle.com/technetwork/topics/security/bulletinapr2016-2952098.html
• http://www.oracle.com/technetwork/topics/security/ovmbulletinoct2016-3090547.html
• https://kb.pulsesecure.net/articles/Pulse_Security_Advisories/SA40312
• https://support.hpe.com/hpsc/doc/public/display?docLocale=en_US&docId=emr_na-hpesbhf03856en_us
• https://www.tenable.com/security/tns-2016-20

Github

• https://github.com/ARPSyndicate/cvemon
• https://github.com/chnzzh/OpenSSL-CVE-lib
• https://github.com/nidhi7598/OPENSSL_1.0.1g_CVE-2016-2178
• https://github.com/tomwillfixit/alpine-cvecheck