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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/cpuapr2018-3678067.html

- 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://cert-portal.siemens.com/productcert/pdf/ssa-412672.pdf

- https://kb.pulsesecure.net/articles/Pulse_Security_Advisories/SA40312

- https://kc.mcafee.com/corporate/index?page=content&id=SB10215

- https://www.tenable.com/security/tns-2016-20

Github

- https://github.com/ARPSyndicate/cvemon

- https://github.com/Samaritin/OSINT

- https://github.com/akaganeite/CVE4PP

- https://github.com/chnzzh/OpenSSL-CVE-lib

- https://github.com/nidhi7598/OPENSSL_1.0.1g_CVE-2016-2178

- https://github.com/tomwillfixit/alpine-cvecheck