← Vulnerability feed

Vulnerability record · CVE-2016-2178 · published 20 June 2016

CVE-2016-2178: Openssl observable discrepancy vulnerability

OOpenssl · Openssl

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.

5.5 CVSS 3.1 Medium EPSS 1.2% · top 30.3% CWE-203 · Observable discrepancy
5.5CVSS 3.1 base score, v2 2.1
1.2%EPSS exploitation probability, 30 days
NoNot in CISA KEV
7Affected product versions listed by NVD
138References
17 Jun 2026Last modified by NVD

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.

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

Affected products

7 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
http://eprint.iacr.org/2016/594.pdf Technical DescriptionThird Party Advisory
http://kb.juniper.net/InfoCenter/index?page=content&id=JSA10759 Third Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2016-09/msg00022.html Mailing ListThird Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2016-09/msg00023.html Mailing ListThird Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2016-09/msg00024.html Mailing ListThird Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2016-09/msg00031.html Mailing ListThird Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2016-10/msg00005.html Mailing ListThird Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2016-10/msg00011.html Mailing ListThird Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2016-10/msg00012.html Mailing ListThird Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2016-10/msg00013.html Third Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2016-10/msg00021.html Mailing ListThird Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2016-10/msg00029.html Mailing ListThird Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2017-10/msg00010.html Mailing ListThird Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2017-10/msg00011.html Mailing ListThird Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2018-02/msg00032.html Mailing ListThird Party Advisory
http://rhn.redhat.com/errata/RHSA-2016-1940.html Third Party Advisory
http://rhn.redhat.com/errata/RHSA-2016-2957.html Third Party Advisory
http://rhn.redhat.com/errata/RHSA-2017-1659.html Third Party Advisory
http://seclists.org/fulldisclosure/2017/Jul/31 Mailing ListThird Party Advisory
http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20160927-openssl Third Party Advisory
http://www-01.ibm.com/support/docview.wss?uid=swg21995039 Third Party Advisory
http://www.debian.org/security/2016/dsa-3673 Third Party Advisory
http://www.huawei.com/en/psirt/security-advisories/huawei-sa-20170322-01-openssl-en Third Party Advisory
http://www.openwall.com/lists/oss-security/2016/06/08/10 Mailing ListThird Party Advisory
http://www.openwall.com/lists/oss-security/2016/06/08/11 Mailing ListThird Party Advisory
http://www.openwall.com/lists/oss-security/2016/06/08/12 Mailing ListThird Party Advisory
http://www.openwall.com/lists/oss-security/2016/06/08/2 Mailing ListPatchThird Party Advisory
http://www.openwall.com/lists/oss-security/2016/06/08/4 Mailing ListThird Party Advisory
http://www.openwall.com/lists/oss-security/2016/06/08/5 Mailing ListThird Party Advisory
http://www.openwall.com/lists/oss-security/2016/06/08/6 Mailing ListThird Party Advisory
http://www.openwall.com/lists/oss-security/2016/06/08/7 Mailing ListThird Party Advisory
http://www.openwall.com/lists/oss-security/2016/06/08/8 Mailing ListThird Party Advisory
http://www.openwall.com/lists/oss-security/2016/06/09/2 Mailing ListThird Party Advisory
http://www.openwall.com/lists/oss-security/2016/06/09/8 Mailing ListThird Party Advisory
http://www.oracle.com/technetwork/security-advisory/cpuapr2018-3678067.html PatchThird Party Advisory
http://www.oracle.com/technetwork/security-advisory/cpujan2018-3236628.html PatchThird Party Advisory
http://www.oracle.com/technetwork/security-advisory/cpujul2017-3236622.html PatchThird Party Advisory
http://www.oracle.com/technetwork/security-advisory/cpuoct2016-2881722.html PatchThird Party Advisory
http://www.oracle.com/technetwork/security-advisory/cpuoct2017-3236626.html PatchThird Party Advisory
http://www.oracle.com/technetwork/topics/security/bulletinapr2016-2952098.html Third Party Advisory

Track CVE-2016-2178 inside VULONE

Watch it alongside the ransomware crews, C2 infrastructure and forum chatter that reference it, query it through the API and pull it into your SIEM over TAXII.

Start free Open in platform

Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

10.0CVE-2025-32433Erlang/OTP SSH server missing authentication allows remote code executionErlang/OTP SSH servers before OTP-27.3.3, OTP-26.2.5.11 and OTP-25.3.2.20 mishandle SSH protocol messages, letting an unauthenticated attacker execut…KEVEPSS 99%analysed10.0CVE-2025-24201Apple WebKit out-of-bounds write allows sandbox escapeCVE-2025-24201 is an out-of-bounds write in Apple's WebKit that was addressed with improved checks. Maliciously crafted web content may break out of …KEVEPSS 3.8%analysed10.0CVE-2021-44228Apache Log4j2 JNDI lookup remote code executionApache Log4j2 versions 2.0-beta9 through 2.15.0 (excluding 2.12.2, 2.12.3, and 2.3.1) do not protect against attacker-controlled LDAP and other JNDI …KEVEPSS 100%analysed10.0CVE-2015-3306ProFTPD mod_copy arbitrary file read and writeThe mod_copy module in ProFTPD 1.3.5 fails to restrict the SITE CPFR and SITE CPTO commands, letting remote attackers copy arbitrary files on the ser…KEVEPSS 99%analysed9.8CVE-2026-24061GNU Inetutils telnetd argument injection allows remote auth bypasstelnetd in GNU Inetutils through 2.7 fails to sanitize the USER environment variable, so a value such as "-f root" is passed as an argument to login …KEVEPSS 99%analysed9.8CVE-2025-39682Linux kernel TLS zero-length record handling flaw on rx_listThe Linux kernel TLS receive path mishandles zero-length records that arrive from the rx_list, breaking the assumption that a record type change cann…KEVEPSS 3.3%analysed9.8CVE-2025-24813Apache Tomcat Default Servlet path equivalence enables RCE and file disclosureApache Tomcat mishandles path equivalence for names containing an internal dot, letting a remote unauthenticated attacker write files through the Def…KEVEPSS 100%analysed9.8CVE-2024-9680Mozilla Firefox and Thunderbird use-after-free in Animation timelinesA use-after-free flaw in Animation timelines allows an attacker to execute code in the content process of Firefox and Thunderbird. Mozilla reports ex…KEVEPSS 23%analysed

Source: NIST National Vulnerability Database (record CVE-2016-2178), CISA KEV, FIRST EPSS (scores of 2026-11-14). This page is refreshed as NVD updates the record.