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.
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | openssl | 1.0.2i-1 | — |
| Debian 13 | openssl | 1.0.2i-1 | — |
| Debian 12 | openssl | 1.0.2i-1 | — |
| Debian 8 | openssl | 1.0.1t-1+deb8u4 | DSA-3673-1 |
| Debian 7 | openssl | 1.0.1t-1+deb7u1 | DLA-637-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 16.04 LTS | openssl | 1.0.2g-1ubuntu4.4 | USN-3087-1 |
| Ubuntu 14.04 LTS | openssl | 1.0.1f-1ubuntu2.20 | USN-3087-1 |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 7 | openssl +4 | 1:1.0.1e-51.el7_2.7 | RHSA-2016:1940 |
| RHEL 6 | openssl +3 | 1.0.1e-48.el6_8.3 | RHSA-2016:1940 |
Show 2 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Red Hat JBoss EAP 6 | jbcs-httpd24-openssl +4 | 1:1.0.2h-13.jbcs.el6 | RHSA-2017:1658 |
| Red Hat JBoss Core Services 1 | jbcs-httpd24-httpd +8 | 2.4.23-102.jbcs.el6 | RHSA-2017:0194, RHSA-2017:0193 |
| Red Hat JBoss Core Services 1 | jbcs-httpd24-mod_auth_kerb | 5.4-35.jbcs.el6 | RHSA-2017:0194, RHSA-2017:0193 |
| Red Hat JBoss Core Services 1 | jbcs-httpd24-mod_bmx +1 | 0.9.6-14.GA.jbcs.el6 | RHSA-2017:0194, RHSA-2017:0193 |
| Red Hat JBoss Core Services 1 | jbcs-httpd24-mod_cluster-native +1 | 1.3.5-13.Final_redhat_1.jbcs.el6 | RHSA-2017:0194, RHSA-2017:0193 |
| Red Hat JBoss Core Services 1 | jbcs-httpd24-mod_jk +3 | 1.2.41-14.redhat_1.jbcs.el6 | RHSA-2017:0194, RHSA-2017:0193 |
| Red Hat JBoss Core Services 1 | jbcs-httpd24-mod_rt +1 | 2.4.1-16.GA.jbcs.el6 | RHSA-2017:0194, RHSA-2017:0193 |
| Red Hat JBoss Core Services 1 | jbcs-httpd24-mod_security +1 | 2.9.1-18.GA.jbcs.el6 | RHSA-2017:0194, RHSA-2017:0193 |
| Red Hat JBoss Core Services 1 | jbcs-httpd24-mod_ssl +1 | 1:2.4.23-102.jbcs.el6 | RHSA-2017:0194, RHSA-2017:0193 |
| Red Hat JBoss Core Services 1 | jbcs-httpd24-nghttp2 | 1.12.0-9.jbcs.el6 | RHSA-2017:0194, RHSA-2017:0193 |
| Red Hat JBoss Core Services 1 | jbcs-httpd24-openssl +4 | 1:1.0.2h-12.jbcs.el6 | RHSA-2017:0194, RHSA-2017:0193 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 12 SP1 | compat-openssl098 | 0.9.8j-102.1 | SUSE-SU-2016:2468-1 |
| SLES 12 SP1 | openssl | 1.0.1i-52.1 | SUSE-SU-2016:2394-1 |
| SLES 12 | compat-openssl098 | 0.9.8j-102.1 | SUSE-SU-2016:2468-1 |
| SLES 12 | nodejs4 | 4.6.0-8.1 | SUSE-SU-2016:2470-2, SUSE-SU-2016:2470-1 |
| SLES 12 | openssl | 1.0.1i-27.21.1 | SUSE-SU-2016:2387-1 |
| SLES 11 SP4 | MozillaFirefox | 68.2.0-78.51.4 | SUSE-SU-2019:14246-1 |
| SLES 11 SP4 | MozillaFirefox-branding-SLED | 68-21.9.8 | SUSE-SU-2019:14246-1 |
| SLES 11 SP4 | firefox-atk | 2.26.1-2.8.4 | SUSE-SU-2019:14246-1 |
| SLES 11 SP4 | firefox-cairo | 1.15.10-2.13.4 | SUSE-SU-2019:14246-1 |
| SLES 11 SP4 | firefox-gdk-pixbuf | 2.36.11-2.8.4 | SUSE-SU-2019:14246-1 |
| SLES 11 SP4 | firefox-glib2 | 2.54.3-2.14.7 | SUSE-SU-2019:14246-1 |
| SLES 11 SP4 | firefox-gtk3 | 3.10.9-2.15.3 | SUSE-SU-2019:14246-1 |
| SLES 11 SP4 | firefox-harfbuzz | 1.7.5-2.7.4 | SUSE-SU-2019:14246-1 |
| SLES 11 SP4 | firefox-libffi | 3.2.1.git259-2.3.3 | SUSE-SU-2019:14246-1 |
| SLES 11 SP4 | firefox-libffi-gcc5 | 5.3.1+r233831-14.1 | SUSE-SU-2019:14246-1 |
| SLES 11 SP4 | firefox-pango | 1.40.14-2.7.4 | SUSE-SU-2019:14246-1 |
| SLES 11 SP4 | mozilla-nspr | 4.21-29.6.1 | SUSE-SU-2019:14246-1 |
| SLES 11 SP4 | mozilla-nss | 3.45-38.9.3 | SUSE-SU-2019:14246-1 |
| SLES 11 SP4 | openssl | 0.9.8j-0.102.2 | SUSE-SU-2016:2458-1 |
| SLES 11 SP3 | openssl | 0.9.8j-0.102.2 | SUSE-SU-2016:2458-1 |
| SLES 11 SP2 | openssl | 0.9.8j-0.102.2 | SUSE-SU-2016:2458-1 |
Show 9 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 11 | openssl1 | 1.0.1g-0.52.1 | SUSE-SU-2016:2469-1 |
| SUSE Studio Onsite 1.3 | openssl | 0.9.8j-0.102.2 | SUSE-SU-2016:2458-1 |
| SLES for SAP 12 SP1 | compat-openssl098 | 0.9.8j-102.1 | SUSE-SU-2016:2468-1 |
| SLES for SAP 12 SP1 | openssl | 1.0.1i-52.1 | SUSE-SU-2016:2394-1 |
| SLES for SAP 12 | openssl | 1.0.1i-27.21.1 | SUSE-SU-2016:2387-1 |
| SLES for SAP 11 SP4 | openssl | 0.9.8j-0.102.2 | SUSE-SU-2016:2458-1 |
| SUSE OpenStack Cloud 5 | openssl | 0.9.8j-0.102.2 | SUSE-SU-2016:2458-1 |
| SUSE Manager Proxy 2.1 | openssl | 0.9.8j-0.102.2 | SUSE-SU-2016:2458-1 |
| SUSE Manager 2.1 | openssl | 0.9.8j-0.102.2 | SUSE-SU-2016:2458-1 |
| SUSE Linux Enterprise Point of Sale 11 SP3 | openssl | 0.9.8j-0.102.2 | SUSE-SU-2016:2458-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | openssl-1_1 | 1.1.1l-1.2 | openSUSE-SU-2024:11127-1 |
Alpine
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.8 | openssl | 1.0.2h-r1 | — |
| Alpine v3.7 | openssl | 1.0.2h-r1 | — |
| Alpine v3.6 | openssl | 1.0.2h-r1 | — |
| Alpine v3.5 | openssl | 1.0.2h-r1 | — |
| Alpine v3.4 | openssl | 1.0.2h-r1 | — |
Show 2 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.3 | openssl | 1.0.2h-r1 | — |
| Alpine v3.2 | openssl | 1.0.2h-r1 | — |
Advisories 22
- RHSA-2016:1940 Red Hat Security Advisory: openssl security update Red Hat Security Advisories (RHSA) · Oct 9, 2026
- RHSA-2017:1658 Red Hat Security Advisory: Red Hat JBoss Enterprise Application Platform 6.4.16 natives update Red Hat Security Advisories (RHSA) · Sep 21, 2026
- RHSA-2017:0193 Red Hat Security Advisory: Red Hat JBoss Core Services Apache HTTP Server 2.4.23 Release on RHEL 6 Red Hat Security Advisories (RHSA) · Sep 21, 2026
- RHSA-2017:0194 Red Hat Security Advisory: Red Hat JBoss Core Services Apache HTTP Server 2.4.23 Release on RHEL 7 Red Hat Security Advisories (RHSA) · Sep 21, 2026
- USN-3087-1 openssl vulnerabilities Ubuntu Security Notices (USN) · Jun 1, 2026
- DSA-3673-1 openssl - security update Debian Security (DSA / DLA) · Mar 9, 2026
- DLA-637-1 openssl - security update Debian Security (DSA / DLA) · Mar 9, 2026
- SUSE-SU-2016:2458-1 Security update for openssl SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2016:2469-1 Security update for openssl1 SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2016:2468-1 Security update for compat-openssl098 SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2016:2394-1 Security update for openssl SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2016:2470-1 Security update for nodejs4 SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2016:2470-2 Security update for nodejs4 SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2019:14246-1 Security update for Mozilla Firefox SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2016:2387-1 Security update for openssl SUSE / openSUSE Security Updates · Feb 4, 2026
- WID-SEC-2026-0180 Dell Data Protection Advisor: Mehrere Schwachstellen BSI CERT-Bund (WID) · Jan 20, 2026
- WID-SEC-2024-0209 OpenSSL: Mehrere Schwachstellen BSI CERT-Bund (WID) · Nov 2, 2025
- openSUSE-SU-2024:11127-1 libopenssl-1_1-devel-1.1.1l-1.2 on GA media SUSE / openSUSE Security Updates · May 7, 2025
- WID-SEC-2024-1277 Oracle Fusion Middleware: Mehrere Schwachstellen BSI CERT-Bund (WID) · Nov 11, 2024
- WID-SEC-2024-0213 OpenSSL: Schwachstelle ermöglicht Offenlegung von Informationen BSI CERT-Bund (WID) · Jan 25, 2024
- ICSA-22-349-21 Siemens SCALANCE X-200RNA Switch Devices CISA ICS & IT advisories · Dec 13, 2022
- SSA-412672 SSA-412672: Multiple OpenSSL and OpenSSH Vulnerabilities in SCALANCE X-200RNA Switch Devices before V3.2.7 Siemens ProductCERT · Dec 13, 2022
References
- https://www.tenable.com/security/tns-2016-20
- http://www.splunk.com/view/SP-CAAAPUE
- http://www.oracle.com/technetwork/security-advisory/cpujan2018-3236628.html
- RHSA-2017:1659 vendor-advisory
- [oss-security] 20160609 Re: CVE-2016-2178: OpenSSL DSA follows a non-constant time codepath for certain operations mailing-list
- RHSA-2017:1658 vendor-advisory
- RHSA-2016:1940 vendor-advisory
- http://www.oracle.com/technetwork/topics/security/linuxbulletinoct2016-3090545.html
- GLSA-201612-16 vendor-advisory
- 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
- http://www.splunk.com/view/SP-CAAAPSV
- http://www-01.ibm.com/support/docview.wss?uid=swg21995039
- http://www.oracle.com/technetwork/security-advisory/cpuoct2016-2881722.html
- https://nodejs.org/en/blog/vulnerability/september-2016-security-releases/
- https://www.tenable.com/security/tns-2016-16
- https://www.tenable.com/security/tns-2016-21
- http://www.oracle.com/technetwork/topics/security/bulletinapr2016-2952098.html
- http://www.oracle.com/technetwork/security-advisory/cpuoct2017-3236626.html
- https://git.openssl.org/?p=openssl.git%3Ba=commit%3Bh=399944622df7bd81af62e67ea967c470534090e2
- http://www.oracle.com/technetwork/security-advisory/cpuapr2018-3678067.html
- 91081 vdb-entry
- RHSA-2017:0194 vendor-advisory
- [oss-security] 20160608 CVE-2016-2178: OpenSSL DSA follows a non-constant time codepath for certain operations mailing-list
- RHSA-2017:0193 vendor-advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1343400
- http://www.oracle.com/technetwork/topics/security/ovmbulletinoct2016-3090547.html
- RHSA-2016:2957 vendor-advisory
- https://bto.bluecoat.com/security-advisory/sa132
- http://www.oracle.com/technetwork/security-advisory/cpujul2017-3236622.html
- FreeBSD-SA-16:26 vendor-advisory
- SUSE-SU-2016:2470 vendor-advisory
- https://h20566.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c05302448
- 1036054 vdb-entry
- http://kb.juniper.net/InfoCenter/index?page=content&id=JSA10759
- http://eprint.iacr.org/2016/594.pdf
- https://kc.mcafee.com/corporate/index?page=content&id=SB10215
- SUSE-SU-2017:2700 vendor-advisory
- USN-3087-1 vendor-advisory
- SUSE-SU-2016:2469 vendor-advisory
- 20160927 Multiple Vulnerabilities in OpenSSL Affecting Cisco Products: September 2016 vendor-advisory
- [oss-security] 20160608 Re: CVE-2016-2178: OpenSSL DSA follows a non-constant time codepath for certain operations mailing-list
- [oss-security] 20160608 Re: CVE-2016-2178: OpenSSL DSA follows a non-constant time codepath for certain operations mailing-list
- openSUSE-SU-2016:2537 vendor-advisory
- [oss-security] 20160608 Re: CVE-2016-2178: OpenSSL DSA follows a non-constant time codepath for certain operations mailing-list
- https://support.f5.com/csp/article/K53084033
- USN-3087-2 vendor-advisory
- SUSE-SU-2017:2699 vendor-advisory
- openSUSE-SU-2016:2407 vendor-advisory
- 20170717 Orion Elite Hidden IP Browser Pro - All Versions - Multiple Known Vulnerabilities mailing-list
- SUSE-SU-2016:2458 vendor-advisory
- https://support.hpe.com/hpsc/doc/public/display?docLocale=en&docId=emr_na-hpesbhf03856en_us
- [oss-security] 20160608 Re: CVE-2016-2178: OpenSSL DSA follows a non-constant time codepath for certain operations mailing-list
- [oss-security] 20160608 Re: CVE-2016-2178: OpenSSL DSA follows a non-constant time codepath for certain operations mailing-list
- [oss-security] 20160608 Re: CVE-2016-2178: OpenSSL DSA follows a non-constant time codepath for certain operations mailing-list
- DSA-3673 vendor-advisory
- openSUSE-SU-2016:2391 vendor-advisory
- openSUSE-SU-2018:0458 vendor-advisory
- [oss-security] 20160608 Re: CVE-2016-2178: OpenSSL DSA follows a non-constant time codepath for certain operations mailing-list
- SUSE-SU-2016:2387 vendor-advisory