Description
During key agreement in a TLS handshake using a DH(E) based ciphersuite a malicious server can send a very large prime value to the client. This will cause the client to spend an unreasonably long period of time generating a key for this prime resulting in a hang until the client has finished. This could be exploited in a Denial Of Service attack. Fixed in OpenSSL 1.1.0i-dev (Affected 1.1.0-1.1.0h). Fixed in OpenSSL 1.0.2p-dev (Affected 1.0.2-1.0.2o).
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| OpenSSL | OpenSSL | Fixed in OpenSSL 1.1.0i-dev (Affected 1.1.0-1.1.0h), Fixed in OpenSSL 1.0.2p-dev (Affected 1.0.2-1.0.2o) | — |
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 | 1.1.1-1 | — |
| Debian 13 | openssl | 1.1.1-1 | — |
| Debian 12 | openssl | 1.1.1-1 | — |
| Debian 9 | openssl | 1.1.0j-1~deb9u1 | DSA-4348-1 |
| Debian 9 | openssl1.0 | 1.0.2q-1~deb9u1 | DSA-4355-1 |
| Debian 8 | openssl | 1.0.1t-1+deb8u9 | DLA-1449-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 18.04 LTS | openssl | 1.1.0g-2ubuntu4.1 | USN-3692-1 |
| Ubuntu 18.04 LTS | openssl1.0 | 1.0.2n-1ubuntu5.1 | USN-3692-1 |
| Ubuntu 16.04 LTS | openssl | 1.0.2g-1ubuntu4.13 | USN-3692-1 |
| Ubuntu 14.04 LTS | openssl | 1.0.1f-1ubuntu2.26 | USN-3692-1 |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 7 | openssl +4 | 1:1.0.2k-16.el7 | RHSA-2018:3221 |
Show 2 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Red Hat Openshift Application Runtimes 1 | npm | 1:5.6.0-1.8.11.4.2.el7 | RHSA-2018:2553, RHSA-2018:2552 |
| Red Hat Openshift Application Runtimes 1 | rhoar-nodejs +1 | 1:8.11.4-2.el7 | RHSA-2018:2553, RHSA-2018:2552 |
| Red Hat JBoss Core Services 1 | jbcs-httpd24-httpd +6 | 2.4.29-40.jbcs.el6 | RHSA-2019:1297 |
| Red Hat JBoss Core Services 1 | jbcs-httpd24-mod_ssl +1 | 1:2.4.29-40.jbcs.el6 | RHSA-2019:1297 |
| Red Hat JBoss Core Services 1 | jbcs-httpd24-openssl +4 | 1:1.0.2n-15.jbcs.el6 | RHSA-2019:1297 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 15 | nodejs8 | 8.11.4-3.8.2 | SUSE-SU-2018:2812-1 |
| SLES 15 | openssl | 1.1.0i-3.3.1 | SUSE-SU-2018:2956-1 |
| SLES 15 | openssl-1_0_0 | 1.0.2n-3.3.1 | SUSE-SU-2018:2965-1, SUSE-SU-2018:2041-1 |
| SLES 15 | openssl-1_1 | 1.1.0h-4.3.1 | SUSE-SU-2018:2956-1, SUSE-SU-2018:2036-1 |
| SLES 12 SP3 | compat-openssl098 | 0.9.8j-106.6.1 | SUSE-SU-2018:2683-1 |
| SLES 12 SP3 | openssl | 1.0.2j-60.30.1 | SUSE-SU-2018:1887-1 |
| SLES 12 SP2 | openssl | 1.0.2j-60.30.1 | SUSE-SU-2018:1887-2, SUSE-SU-2018:1887-1 |
| SLES 12 SP1 | openssl | 1.0.1i-54.14.1 | SUSE-SU-2018:1968-1 |
| SLES 12 | compat-openssl098 | 0.9.8j-106.6.1 | SUSE-SU-2018:2683-1 |
| SLES 12 | nodejs4 | 4.9.1-15.14.1 | SUSE-SU-2018:2647-1 |
| SLES 12 | nodejs6 | 6.14.4-11.18.1 | SUSE-SU-2018:2796-1 |
| SLES 12 | openssl | 1.0.1i-27.34.1 | SUSE-SU-2019:1553-1 |
Show 12 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| 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-0.106.12.1 | SUSE-SU-2018:2207-1 |
| SLES 11 SP3 | openssl | 0.9.8j-0.106.12.1 | SUSE-SU-2018:2207-1 |
| SLES 11 | openssl1 | 1.0.1g-0.58.12.1 | SUSE-SU-2018:2545-1 |
| SUSE Studio Onsite 1.3 | openssl | 0.9.8j-0.106.12.1 | SUSE-SU-2018:2207-1 |
| SLES for SAP 12 SP3 | compat-openssl098 | 0.9.8j-106.6.1 | SUSE-SU-2018:2683-1 |
| SLES for SAP 12 SP3 | openssl | 1.0.2j-60.30.1 | SUSE-SU-2018:1887-1 |
| SLES for SAP 12 SP2 | compat-openssl098 | 0.9.8j-106.6.1 | SUSE-SU-2018:2683-1 |
| SLES for SAP 12 SP2 | openssl | 1.0.2j-60.30.1 | SUSE-SU-2018:1887-1 |
| SLES for SAP 12 SP1 | compat-openssl098 | 0.9.8j-106.6.1 | SUSE-SU-2018:2683-1 |
| SLES for SAP 12 SP1 | openssl | 1.0.1i-54.14.1 | SUSE-SU-2018:1968-1 |
| SLES for SAP 11 SP4 | compat-openssl097g | 0.9.7g-146.22.51.5.1 | SUSE-SU-2018:2534-1 |
| SLES for SAP 11 SP4 | openssl | 0.9.8j-0.106.12.1 | SUSE-SU-2018:2207-1 |
| SUSE OpenStack Cloud Crowbar 8 | nodejs6 | 6.14.4-11.18.1 | SUSE-SU-2018:2796-1 |
| SUSE OpenStack Cloud 7 | nodejs6 | 6.14.4-11.18.1 | SUSE-SU-2018:2796-1 |
| SUSE OpenStack Cloud 7 | openssl | 1.0.2j-60.30.1 | SUSE-SU-2018:1887-1 |
| SUSE Linux Enterprise Point of Sale 11 SP3 | openssl | 0.9.8j-0.106.12.1 | SUSE-SU-2018:2207-1 |
| SUSE Enterprise Storage 4 | nodejs4 | 4.9.1-15.14.1 | SUSE-SU-2018:2647-1 |
| SUSE Enterprise Storage 4 | nodejs6 | 6.14.4-11.18.1 | SUSE-SU-2018:2796-1 |
| SUSE Enterprise Storage 4 | openssl | 1.0.2j-60.30.1 | SUSE-SU-2018:1887-1 |
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 Tumbleweed | virtualbox | 6.1.26-3.2 | openSUSE-SU-2024:11501-1 |
Alpine
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.24 | libressl | 2.7.4-r0 | — |
| Alpine v3.23 | libressl | 2.7.4-r0 | — |
| Alpine v3.22 | libressl | 2.7.4-r0 | — |
| Alpine v3.21 | libressl | 2.7.4-r0 | — |
| Alpine v3.20 | libressl | 2.7.4-r0 | — |
Show 17 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.19 | libressl | 2.7.4-r0 | — |
| Alpine v3.18 | libressl | 2.7.4-r0 | — |
| Alpine v3.17 | libressl | 2.7.4-r0 | — |
| Alpine v3.16 | libressl | 2.7.4-r0 | — |
| Alpine v3.15 | libressl | 2.7.4-r0 | — |
| Alpine v3.14 | libressl | 2.7.4-r0 | — |
| Alpine v3.13 | libressl | 2.7.4-r0 | — |
| Alpine v3.12 | libressl | 2.7.4-r0 | — |
| Alpine v3.11 | libressl | 2.7.4-r0 | — |
| Alpine v3.10 | libressl | 2.7.4-r0 | — |
| Alpine v3.9 | libressl | 2.7.4-r0 | — |
| Alpine v3.8 | libressl | 2.7.4-r0 | — |
| Alpine v3.8 | openssl | 1.0.2o-r1 | — |
| Alpine v3.7 | libressl | 2.6.5-r0 | — |
| Alpine v3.7 | openssl | 1.0.2o-r1 | — |
| Alpine v3.6 | openssl | 1.0.2o-r1 | — |
| Alpine v3.5 | openssl | 1.0.2o-r1 | — |
| Alpine v3.4 | openssl | 1.0.2o-r1 | — |
| Alpine v3.3 | openssl | 1.0.2o-r1 | — |
Amazon Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Amazon Linux 2 | openssl +4 | 1:1.0.2k-16.amzn2.0.1 | ALAS2-2018-1102 |
Oracle Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Oracle Linux 7 | openssl +4 | 1:1.0.2k-12.0.3.el7 | ELSA-2018-4249, ELSA-2018-3221 |
Advisories 38
- RHSA-2018:3221 Red Hat Security Advisory: openssl security, bug fix, and enhancement update Red Hat Security Advisories (RHSA) · Oct 16, 2026
- RHSA-2018:2552 Red Hat Security Advisory: Red Hat OpenShift Application Runtimes Node.js 8.11.4 security update Red Hat Security Advisories (RHSA) · Oct 16, 2026
- RHSA-2018:2553 Red Hat Security Advisory: Red Hat OpenShift Application Runtimes Node.js 10.9.0 security update Red Hat Security Advisories (RHSA) · Oct 16, 2026
- RHSA-2019:1297 Red Hat Security Advisory: Red Hat JBoss Core Services Apache HTTP Server 2.4.29 SP2 security update Red Hat Security Advisories (RHSA) · Oct 14, 2026
- WID-SEC-2022-1696 Oracle MySQL: Mehrere Schwachstellen BSI CERT-Bund (WID) · Oct 13, 2026
- USN-3692-1 openssl, openssl1.0 vulnerabilities Ubuntu Security Notices (USN) · Apr 22, 2026
- DSA-4355-1 openssl1.0 - security update Debian Security (DSA / DLA) · Mar 9, 2026
- DSA-4348-1 openssl - security update Debian Security (DSA / DLA) · Mar 9, 2026
- DLA-1449-1 openssl - security update Debian Security (DSA / DLA) · Mar 9, 2026
- SUSE-SU-2018:2036-1 Security update for openssl-1_1 SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2018:2534-1 Security update for compat-openssl097g SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2018:2647-1 Security update for nodejs4 SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2018:2796-1 Security update for nodejs6 SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2018:2207-1 Security update for openssl SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2018:2965-1 Security update for openssl-1_0_0 SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2018:1968-1 Security update for openssl SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2024:11501-1 python3-virtualbox-6.1.26-3.2 on GA media SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2018:2683-1 Security update for compat-openssl098 SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2018:2545-1 Security update for openssl1 SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2018:2041-1 Security update for openssl-1_1 SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2018:2812-1 Security update for nodejs8 SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2019:14246-1 Security update for Mozilla Firefox 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-2018:2956-1 Security update for openssl-1_1 SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2019:1553-1 Security update for openssl SUSE / openSUSE Security Updates · Feb 4, 2026
- WID-SEC-2022-1413 OpenSSL: Schwachstelle ermöglicht Denial of Service BSI CERT-Bund (WID) · Oct 20, 2025
- WID-SEC-2025-1212 Oracle Communications Applications: Mehrere Schwachstellen BSI CERT-Bund (WID) · Jun 2, 2025
- VDE-2020-038 Pepperl+Fuchs: Multiple vulnerabilites in Comtrol IO-Link Master CERT@VDE · May 14, 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
- ICSA-21-159-08 Siemens TIM 1531 IRC CISA ICS & IT advisories · May 6, 2025
- SUSE-SU-2018:1887-1 Security update for openssl SUSE / openSUSE Security Updates · May 2, 2025
- SUSE-SU-2018:1887-2 Security update for openssl SUSE / openSUSE Security Updates · May 2, 2025
- NCSC-2024-0239 Kwetsbaarheden verholpen in Solarwinds Platform NCSC-NL (Netherlands) · Jun 7, 2024
- WID-SEC-2023-1594 IBM Tivoli Network Manager: Mehrere Schwachstellen BSI CERT-Bund (WID) · Jun 28, 2023
- SSA-419820 SSA-419820: Denial-of-Service Vulnerability in TIM 1531 IRC Siemens ProductCERT · Jun 8, 2021
- ALAS2-2018-1102 Moderate: openssl security update (Amazon Linux 2) Amazon Linux Security Center (ALAS) · Nov 8, 2018
- ELSA-2018-3221 Moderate: openssl security, bug fix, and enhancement update (Oracle Linux 7) Oracle Linux Security Advisories (ELSA) · Nov 5, 2018
- ELSA-2018-4249 Important: openssl security update (Oracle Linux 7) Oracle Linux Security Advisories (ELSA) · Oct 12, 2018
References
- [debian-lts-announce] 20180728 [SECURITY] [DLA 1449-1] openssl security update mailing-list
- 104442 vdb-entry
- DSA-4355 vendor-advisory
- RHSA-2018:2552 vendor-advisory
- GLSA-201811-03 vendor-advisory
- USN-3692-2 vendor-advisory
- RHSA-2018:2553 vendor-advisory
- RHSA-2018:3505 vendor-advisory
- USN-3692-1 vendor-advisory
- RHSA-2018:3221 vendor-advisory
- DSA-4348 vendor-advisory
- 1041090 vdb-entry
- RHSA-2019:1297 vendor-advisory
- RHSA-2019:1296 vendor-advisory
- RHSA-2019:1543 vendor-advisory
- FEDORA-2019-db06efdea1 vendor-advisory
- FEDORA-2019-00c25b9379 vendor-advisory
- FEDORA-2019-9a0a7c0986 vendor-advisory
- https://www.oracle.com/security-alerts/cpuapr2020.html
- http://www.oracle.com/technetwork/security-advisory/cpuoct2018-4428296.html
- https://www.oracle.com/technetwork/security-advisory/cpujan2019-5072801.html
- https://www.oracle.com/technetwork/security-advisory/cpuapr2019-5072813.html
- https://www.oracle.com/technetwork/security-advisory/cpujul2019-5072835.html
- https://www.oracle.com/technetwork/security-advisory/cpuoct2019-5072832.html
- https://www.oracle.com/security-alerts/cpujan2021.html
- https://www.tenable.com/security/tns-2018-14
- https://securityadvisories.paloaltonetworks.com/Home/Detail/133
- https://www.tenable.com/security/tns-2018-13
- https://www.tenable.com/security/tns-2018-17
- https://www.tenable.com/security/tns-2018-12
- https://security.netapp.com/advisory/ntap-20181105-0001/
- https://nodejs.org/en/blog/vulnerability/august-2018-security-releases/
- https://git.openssl.org/gitweb/?p=openssl.git%3Ba=commitdiff%3Bh=3984ef0b72831da8b3ece4745cac4f8575b19098
- https://www.openssl.org/news/secadv/20180612.txt
- https://git.openssl.org/gitweb/?p=openssl.git%3Ba=commitdiff%3Bh=ea7abeeabf92b7aca160bdd0208636d4da69f4f4
- https://security.netapp.com/advisory/ntap-20190118-0002/
- https://cert-portal.siemens.com/productcert/pdf/ssa-419820.pdf