Description
Normally in OpenSSL EC groups always have a co-factor present and this is used in side channel resistant code paths. However, in some cases, it is possible to construct a group using explicit parameters (instead of using a named curve). In those cases it is possible that such a group does not have the cofactor present. This can occur even where all the parameters match a known named curve. If such a curve is used then OpenSSL falls back to non-side channel resistant code paths which may result in full key recovery during an ECDSA signature operation. In order to be vulnerable an attacker would have to have the ability to time the creation of a large number of signatures where explicit parameters with no co-factor present are in use by an application using libcrypto. For the avoidance of doubt libssl is not vulnerable because explicit parameters are never used. Fixed in OpenSSL 1.1.1d (Affected 1.1.1-1.1.1c). Fixed in OpenSSL 1.1.0l (Affected 1.1.0-1.1.0k). Fixed in OpenSSL 1.0.2t (Affected 1.0.2-1.0.2s).
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| OpenSSL | OpenSSL | Fixed in OpenSSL 1.1.1d (Affected 1.1.1-1.1.1c), Fixed in OpenSSL 1.1.0l (Affected 1.1.0-1.1.0k), Fixed in OpenSSL 1.0.2t (Affected 1.0.2-1.0.2s) | — |
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 | 1.1.1d-1 | — |
| Debian 13 | openssl | 1.1.1d-1 | — |
| Debian 12 | openssl | 1.1.1d-1 | — |
| Debian 10 | openssl | 1.1.1d-0+deb10u1 | DSA-4539-1 |
| Debian 9 | openssl | 1.1.0l-1~deb9u1 | DSA-4539-1 |
| Debian 9 | openssl1.0 | 1.0.2t-1~deb9u1 | DSA-4540-1 |
Show 1 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 8 | openssl | 1.0.1t-1+deb8u12 | DLA-1932-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 18.04 LTS | openssl | 1.1.1-1ubuntu2.1~18.04.6 | USN-4376-1 |
| Ubuntu 18.04 LTS | openssl1.0 | 1.0.2n-1ubuntu5.4 | USN-4504-1 |
| Ubuntu 16.04 LTS | openssl | 1.0.2g-1ubuntu4.16 | USN-4504-1, USN-4376-1 |
Show 1 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu Pro 14.04 LTS | openssl | 1.0.1f-1ubuntu2.27+esm1 | USN-4376-2 |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 8 | openssl +3 | 1:1.1.1c-15.el8 | RHSA-2020:1840 |
Show 1 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Red Hat JBoss Core Services 1 | jbcs-httpd24-apr +1 | 1.6.3-86.jbcs.el6 | RHSA-2020:1337 |
| Red Hat JBoss Core Services 1 | jbcs-httpd24-brotli +1 | 1.0.6-21.jbcs.el6 | RHSA-2020:1337 |
| Red Hat JBoss Core Services 1 | jbcs-httpd24-httpd +6 | 2.4.37-52.jbcs.el6 | RHSA-2020:1337 |
| Red Hat JBoss Core Services 1 | jbcs-httpd24-mod_cluster-native | 1.3.12-41.Final_redhat_2.jbcs.el6 | RHSA-2020:1337 |
| Red Hat JBoss Core Services 1 | jbcs-httpd24-mod_http2 | 1.11.3-22.jbcs.el6 | RHSA-2020:1337 |
| Red Hat JBoss Core Services 1 | jbcs-httpd24-mod_ssl +1 | 1:2.4.37-52.jbcs.el6 | RHSA-2020:1337 |
| Red Hat JBoss Core Services 1 | jbcs-httpd24-openssl +4 | 1:1.1.1c-16.jbcs.el6 | RHSA-2020:1337 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 15 SP1 | openssl-1_0_0 | 1.0.2p-3.22.1 | SUSE-SU-2019:2561-1 |
| SLES 15 SP1 | openssl-1_1 | 1.1.0i-14.3.1 | SUSE-SU-2019:2403-1 |
| SLES 15 | openssl-1_0_0 | 1.0.2p-3.22.1 | SUSE-SU-2019:2561-1 |
| SLES 15 | openssl-1_1 | 1.1.0i-4.24.1 | SUSE-SU-2019:2410-1 |
| SLES 12 SP5 | openssl-1_1 | 1.1.1d-2.20.1 | SUSE-SU-2020:0099-1 |
| SLES 12 SP4 | compat-openssl098 | 0.9.8j-106.15.1 | SUSE-SU-2019:2558-1 |
| SLES 12 SP4 | openssl-1_0_0 | 1.0.2p-3.11.1 | SUSE-SU-2019:2504-1 |
| SLES 12 SP4 | openssl-1_1 | 1.1.1d-2.20.1 | SUSE-SU-2020:0099-1 |
| SLES 12 SP3 | openssl | 1.0.2j-60.55.1 | SUSE-SU-2019:2413-1 |
Show 18 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 12 SP2 | openssl | 1.0.2j-60.55.1 | SUSE-SU-2019:2413-1 |
| SLES 12 SP1 | openssl | 1.0.1i-54.29.1 | SUSE-SU-2019:2397-1 |
| SLES 12 | compat-openssl098 | 0.9.8j-106.15.1 | SUSE-SU-2019:2558-1 |
| SLES 11 SP4 | openssl | 0.9.8j-0.106.25.1 | SUSE-SU-2019:14174-1 |
| SLES 11 | openssl1 | 1.0.1g-0.58.21.1 | SUSE-SU-2019:14171-1 |
| SLES for SAP 12 SP5 | openssl-1_1 | 1.1.1d-2.20.1 | SUSE-SU-2020:0099-1 |
| SLES for SAP 12 SP4 | compat-openssl098 | 0.9.8j-106.15.1 | SUSE-SU-2019:2558-1 |
| SLES for SAP 12 SP4 | openssl-1_0_0 | 1.0.2p-3.11.1 | SUSE-SU-2019:2504-1 |
| SLES for SAP 12 SP4 | openssl-1_1 | 1.1.1d-2.20.1 | SUSE-SU-2020:0099-1 |
| SLES for SAP 12 SP3 | compat-openssl098 | 0.9.8j-106.15.1 | SUSE-SU-2019:2558-1 |
| SLES for SAP 12 SP3 | openssl | 1.0.2j-60.55.1 | SUSE-SU-2019:2413-1 |
| SLES for SAP 12 SP2 | compat-openssl098 | 0.9.8j-106.15.1 | SUSE-SU-2019:2558-1 |
| SLES for SAP 12 SP2 | openssl | 1.0.2j-60.55.1 | SUSE-SU-2019:2413-1 |
| SLES for SAP 12 SP1 | compat-openssl098 | 0.9.8j-106.15.1 | SUSE-SU-2019:2558-1 |
| SLES for SAP 12 SP1 | openssl | 1.0.1i-54.29.1 | SUSE-SU-2019:2397-1 |
| SUSE OpenStack Cloud Crowbar 8 | openssl | 1.0.2j-60.55.1 | SUSE-SU-2019:2413-1 |
| SUSE OpenStack Cloud 8 | openssl | 1.0.2j-60.55.1 | SUSE-SU-2019:2413-1 |
| SUSE OpenStack Cloud 7 | openssl | 1.0.2j-60.55.1 | SUSE-SU-2019:2413-1 |
| SUSE Linux Enterprise Point of Sale 11 SP3 | openssl | 0.9.8j-0.106.25.1 | SUSE-SU-2019:14174-1 |
| SUSE HPE Helion OpenStack 8 | openssl | 1.0.2j-60.55.1 | SUSE-SU-2019:2413-1 |
| SUSE Enterprise Storage 6 | openssl-1_0_0 | 1.0.2p-3.22.1 | SUSE-SU-2019:2561-1 |
| SUSE Enterprise Storage 5 | openssl | 1.0.2j-60.55.1 | SUSE-SU-2019:2413-1 |
| SUSE Enterprise Storage 4 | openssl | 1.0.2j-60.55.1 | SUSE-SU-2019:2413-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | openssl-1_0_0 | 1.0.2u-6.2 | openSUSE-SU-2024:11126-1 |
| openSUSE Tumbleweed | openssl-1_1 | 1.1.1l-1.2 | openSUSE-SU-2024:11127-1 |
| openSUSE Leap 15.1 | openssl-1_0_0 | 1.0.2p-lp151.5.10.1 | openSUSE-SU-2019:2269-1 |
| openSUSE Leap 15.1 | openssl-1_1 | 1.1.0i-lp151.8.3.1 | openSUSE-SU-2019:2158-1 |
| openSUSE Leap 15.0 | openssl-1_0_0 | 1.0.2p-lp150.2.19.1 | openSUSE-SU-2019:2268-1 |
| openSUSE Leap 15.0 | openssl-1_1 | 1.1.0i-lp150.3.25.1 | openSUSE-SU-2019:2189-1 |
Alpine
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.24 | openssl | 1.1.1d-r1 | — |
| Alpine v3.23 | openssl | 1.1.1d-r1 | — |
| Alpine v3.22 | openssl | 1.1.1d-r1 | — |
| Alpine v3.21 | openssl | 1.1.1d-r1 | — |
| Alpine v3.20 | openssl | 1.1.1d-r1 | — |
Show 13 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.19 | openssl | 1.1.1d-r1 | — |
| Alpine v3.18 | openssl +1 | 1.1.1d-r1 | — |
| Alpine v3.17 | openssl +1 | 1.1.1d-r1 | — |
| Alpine v3.16 | openssl +1 | 1.1.1d-r1 | — |
| Alpine v3.15 | openssl +1 | 1.1.1d-r1 | — |
| Alpine v3.14 | openssl | 1.1.1d-r1 | — |
| Alpine v3.13 | openssl | 1.1.1d-r1 | — |
| Alpine v3.12 | openssl | 1.1.1d-r1 | — |
| Alpine v3.11 | openssl | 1.1.1d-r1 | — |
| Alpine v3.10 | openssl | 1.1.1d-r0 | — |
| Alpine v3.9 | openssl | 1.1.1d-r0 | — |
| Alpine v3.8 | openssl | 1.0.2t-r0 | — |
| Alpine v3.7 | openssl | 1.0.2t-r0 | — |
Amazon Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Amazon Linux 2 | openssl +4 | 1:1.0.2k-19.amzn2.0.3 | ALAS2-2020-1406 |
| Amazon Linux 2 | openssl11 +3 | 1:1.1.1c-15.amzn2.0.1 | ALAS2-2020-1456 |
Oracle Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Oracle Linux 8 | openssl +3 | 1:1.1.1c-15.el8 | ELSA-2020-1840 |
Advisories 31
- WID-SEC-2026-4026 Red Hat OpenShift: Mehrere Schwachstellen BSI CERT-Bund (WID) · Oct 18, 2026
- RHSA-2020:1840 Red Hat Security Advisory: openssl security and bug fix update Red Hat Security Advisories (RHSA) · Sep 21, 2026
- RHSA-2020:1337 Red Hat Security Advisory: Red Hat JBoss Core Services Apache HTTP Server 2.4.37 SP2 security update Red Hat Security Advisories (RHSA) · Sep 21, 2026
- USN-4376-2 openssl vulnerabilities Ubuntu Security Notices (USN) · Apr 27, 2026
- USN-4504-1 openssl, openssl1.0 vulnerabilities Ubuntu Security Notices (USN) · Apr 27, 2026
- USN-4376-1 openssl vulnerabilities Ubuntu Security Notices (USN) · Apr 27, 2026
- DSA-4539-1 openssl - security update Debian Security (DSA / DLA) · Mar 9, 2026
- DSA-4540-1 openssl1.0 - security update Debian Security (DSA / DLA) · Mar 9, 2026
- DLA-1932-1 openssl - security update Debian Security (DSA / DLA) · Mar 9, 2026
- SUSE-SU-2019:2504-1 Security update for openssl-1_0_0 SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2019:2158-1 Security update for openssl-1_1 SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2019:2269-1 Security update for openssl-1_0_0 SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2019:14174-1 Security update for openssl SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2019:2189-1 Security update for openssl-1_1 SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2019:2397-1 Security update for openssl SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2020:0099-1 Security update for openssl-1_1 SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2019:2561-1 Security update for openssl-1_0_0 SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2019:2558-1 Security update for compat-openssl098 SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2019:14171-1 Security update for openssl1 SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2019:2413-1 Security update for openssl SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2024:11126-1 libopenssl-1_0_0-devel-1.0.2u-6.2 on GA media SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2019:2403-1 Security update for openssl-1_1 SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2019:2410-1 Security update for openssl-1_1 SUSE / openSUSE Security Updates · Feb 4, 2026
- WID-SEC-2023-1762 OpenSSL: Schwachstelle ermöglicht Umgehen von Sicherheitsvorkehrungen BSI CERT-Bund (WID) · Oct 20, 2025
- openSUSE-SU-2019:2268-1 Security update for openssl-1_0_0 SUSE / openSUSE Security Updates · May 7, 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-2023-1049 Oracle MySQL: Mehrere Schwachstellen BSI CERT-Bund (WID) · Apr 20, 2023
- ICSA-21-336-06 Hitachi Energy APM Edge CISA ICS & IT advisories · Dec 2, 2021
- ALAS2-2020-1456 Moderate: openssl11 security update (Amazon Linux 2) Amazon Linux Security Center (ALAS) · Jul 17, 2020
- ELSA-2020-1840 Moderate: openssl security and bug fix update (Oracle Linux 8) Oracle Linux Security Advisories (ELSA) · May 5, 2020
- ALAS2-2020-1406 Important: openssl security update (Amazon Linux 2) Amazon Linux Security Center (ALAS) · Mar 25, 2020
References
- 20190912 [slackware-security] openssl (SSA:2019-254-03) mailing-list
- openSUSE-SU-2019:2158 vendor-advisory
- FEDORA-2019-d15aac6c4e vendor-advisory
- openSUSE-SU-2019:2189 vendor-advisory
- [debian-lts-announce] 20190925 [SECURITY] [DLA 1932-1] openssl security update mailing-list
- FEDORA-2019-d51641f152 vendor-advisory
- 20191001 [SECURITY] [DSA 4539-1] openssl security update mailing-list
- 20191001 [SECURITY] [DSA 4540-1] openssl1.0 security update mailing-list
- DSA-4539 vendor-advisory
- DSA-4540 vendor-advisory
- openSUSE-SU-2019:2268 vendor-advisory
- openSUSE-SU-2019:2269 vendor-advisory
- GLSA-201911-04 vendor-advisory
- USN-4376-1 vendor-advisory
- https://www.oracle.com/security-alerts/cpuapr2020.html
- https://www.oracle.com/security-alerts/cpujul2020.html
- https://www.oracle.com/technetwork/security-advisory/cpuoct2019-5072832.html
- https://www.tenable.com/security/tns-2019-08
- https://www.oracle.com/security-alerts/cpujan2020.html
- https://www.openssl.org/news/secadv/20190910.txt
- https://git.openssl.org/gitweb/?p=openssl.git%3Ba=commitdiff%3Bh=30c22fa8b1d840036b8e203585738df62a03cec8
- https://git.openssl.org/gitweb/?p=openssl.git%3Ba=commitdiff%3Bh=7c1709c2da5414f5b6133d00a03fc8c5bf996c7a
- https://git.openssl.org/gitweb/?p=openssl.git%3Ba=commitdiff%3Bh=21c856b75d81eff61aa63b4f036bb64a85bf6d46
- https://arxiv.org/abs/1909.01785
- http://packetstormsecurity.com/files/154467/Slackware-Security-Advisory-openssl-Updates.html
- https://security.netapp.com/advisory/ntap-20190919-0002/
- https://support.f5.com/csp/article/K73422160?utm_source=f5support&%3Butm_medium=RSS
- https://www.tenable.com/security/tns-2019-09
- https://security.netapp.com/advisory/ntap-20200122-0002/
- https://security.netapp.com/advisory/ntap-20200416-0003/
- USN-4376-2 vendor-advisory
- USN-4504-1 vendor-advisory
- https://www.oracle.com/security-alerts/cpuoct2020.html
- https://kc.mcafee.com/corporate/index?page=content&id=SB10365
- https://security.netapp.com/advisory/ntap-20240621-0006/