Description
OpenSSL 1.0.2 (starting from version 1.0.2b) introduced an "error state" mechanism. The intent was that if a fatal error occurred during a handshake then OpenSSL would move into the error state and would immediately fail if you attempted to continue the handshake. This works as designed for the explicit handshake functions (SSL_do_handshake(), SSL_accept() and SSL_connect()), however due to a bug it does not work correctly if SSL_read() or SSL_write() is called directly. In that scenario, if the handshake fails then a fatal error will be returned in the initial function call. If SSL_read()/SSL_write() is subsequently called by the application for the same SSL object then it will succeed and the data is passed without being decrypted/encrypted directly from the SSL/TLS record layer. In order to exploit this issue an application bug would have to be present that resulted in a call to SSL_read()/SSL_write() being issued after having already received a fatal error. OpenSSL version 1.0.2b-1.0.2m are affected. Fixed in OpenSSL 1.0.2n. OpenSSL 1.1.0 is not affected.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| OpenSSL Software Foundation | OpenSSL | 1.0.2b-1.0.2m | — |
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 | 1.1.0b-2 | — |
| Debian 13 | openssl | 1.1.0b-2 | — |
| Debian 12 | openssl | 1.1.0b-2 | — |
| Debian 9 | openssl1.0 | 1.0.2l-2+deb9u2 | DSA-4065-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 16.04 LTS | openssl | 1.0.2g-1ubuntu4.10 | USN-3512-1 |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 7 | openssl +4 | 1:1.0.2k-12.el7 | RHSA-2018:0998 |
Show 1 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Red Hat JBoss Core Services 1 | jbcs-httpd24-apache-commons-daemon | 1.1.0-1.redhat_2.1.jbcs.el6 | RHSA-2018:2186, RHSA-2018:2185 |
| Red Hat JBoss Core Services 1 | jbcs-httpd24-apache-commons-daemon-jsvc | 1:1.1.0-1.redhat_2.jbcs.el6 | RHSA-2018:2186, RHSA-2018:2185 |
| Red Hat JBoss Core Services 1 | jbcs-httpd24-apr +1 | 1.6.3-14.jbcs.el6 | RHSA-2018:2186, RHSA-2018:2185 |
| Red Hat JBoss Core Services 1 | jbcs-httpd24-apr-util +8 | 1.6.1-9.jbcs.el6 | RHSA-2018:2186, RHSA-2018:2185 |
| Red Hat JBoss Core Services 1 | jbcs-httpd24-httpd +6 | 2.4.29-17.jbcs.el6 | RHSA-2018:2186, RHSA-2018:2185 |
| Red Hat JBoss Core Services 1 | jbcs-httpd24-mod_auth_kerb | 5.4-36.jbcs.el6 | RHSA-2018:2186, RHSA-2018:2185 |
| Red Hat JBoss Core Services 1 | jbcs-httpd24-mod_bmx | 0.9.6-17.GA.jbcs.el6 | RHSA-2018:2186, RHSA-2018:2185 |
| Red Hat JBoss Core Services 1 | jbcs-httpd24-mod_cluster-native | 1.3.8-1.Final_redhat_2.jbcs.el6 | RHSA-2018:2186, RHSA-2018:2185 |
| Red Hat JBoss Core Services 1 | jbcs-httpd24-mod_jk +2 | 1.2.43-1.redhat_1.jbcs.el6 | RHSA-2018:2186, RHSA-2018:2185 |
| Red Hat JBoss Core Services 1 | jbcs-httpd24-mod_rt | 2.4.1-19.GA.jbcs.el6 | RHSA-2018:2186, RHSA-2018:2185 |
| Red Hat JBoss Core Services 1 | jbcs-httpd24-mod_security | 2.9.1-23.GA.jbcs.el6 | RHSA-2018:2186, RHSA-2018:2185 |
| Red Hat JBoss Core Services 1 | jbcs-httpd24-mod_ssl +1 | 1:2.4.29-17.jbcs.el6 | RHSA-2018:2186, RHSA-2018:2185 |
| Red Hat JBoss Core Services 1 | jbcs-httpd24-nghttp2 +1 | 1.29.0-8.jbcs.el6 | RHSA-2018:2186, RHSA-2018:2185 |
| Red Hat JBoss Core Services 1 | jbcs-httpd24-openssl +4 | 1:1.0.2n-11.jbcs.el6 | RHSA-2018:2186, RHSA-2018:2185 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 12 SP3 | openssl | 1.0.2j-60.20.2 | SUSE-SU-2017:3343-1 |
| SLES 12 SP2 | openssl | 1.0.2j-60.20.2 | SUSE-SU-2017:3343-1 |
Show 2 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES for SAP 12 SP3 | openssl | 1.0.2j-60.20.2 | SUSE-SU-2017:3343-1 |
| SLES for SAP 12 SP2 | openssl | 1.0.2j-60.20.2 | SUSE-SU-2017:3343-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | openssl-1_0_0 | 1.0.2u-6.2 | openSUSE-SU-2024:11126-1 |
Alpine
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.8 | openssl | 1.0.2n-r0 | — |
| Alpine v3.7 | openssl | 1.0.2n-r0 | — |
| Alpine v3.6 | openssl | 1.0.2n-r0 | — |
| Alpine v3.5 | openssl | 1.0.2n-r0 | — |
| Alpine v3.4 | openssl | 1.0.2n-r0 | — |
Show 1 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.3 | openssl | 1.0.2n-r0 | — |
Amazon Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Amazon Linux 2 | openssl +4 | 1:1.0.2k-12.amzn2.0.1 | ALAS2-2018-1004 |
Oracle Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Oracle Linux 7 | openssl +4 | 1:1.0.2k-12.0.1.el7 | ELSA-2018-0998 |
Advisories 16
- RHSA-2018:2186 Red Hat Security Advisory: Red Hat JBoss Core Services Apache HTTP Server 2.4.29 RHEL 6 security update Red Hat Security Advisories (RHSA) · Sep 21, 2026
- RHSA-2018:2185 Red Hat Security Advisory: Red Hat JBoss Core Services Apache HTTP Server 2.4.29 RHEL 7 security update Red Hat Security Advisories (RHSA) · Sep 21, 2026
- RHSA-2018:0998 Red Hat Security Advisory: openssl security and bug fix update Red Hat Security Advisories (RHSA) · Sep 21, 2026
- USN-3512-1 openssl vulnerabilities Ubuntu Security Notices (USN) · Apr 22, 2026
- DSA-4065-1 openssl1.0 - security update Debian Security (DSA / DLA) · Mar 9, 2026
- SUSE-SU-2017:3343-1 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
- WID-SEC-2026-0180 Dell Data Protection Advisor: Mehrere Schwachstellen BSI CERT-Bund (WID) · Jan 20, 2026
- WID-SEC-2024-0205 OpenSSL: Mehrere Schwachstellen ermöglichen Umgehen von Sicherheitsvorkehrungen BSI CERT-Bund (WID) · Oct 20, 2025
- VDE-2019-009 PHOENIX CONTACT: Multiple Vulnerabilities in AXC F 2152 CERT@VDE · May 22, 2025
- WID-SEC-2023-1594 IBM Tivoli Network Manager: Mehrere Schwachstellen BSI CERT-Bund (WID) · Jun 28, 2023
- ICSA-18-226-02 Siemens OpenSSL Vulnerability in Industrial Products (Update E) CISA ICS & IT advisories · Sep 13, 2022
- SSA-179516 SSA-179516 OpenSSL Vulnerability in Industrial Products Siemens ProductCERT · Sep 13, 2022
- ICSA-19-155-01 PHOENIX CONTACT PLCNext AXC F 2152 CISA ICS & IT advisories · Jun 4, 2019
- ALAS2-2018-1004 Moderate: openssl security update (Amazon Linux 2) Amazon Linux Security Center (ALAS) · Apr 26, 2018
- ELSA-2018-0998 Moderate: openssl security and bug fix update (Oracle Linux 7) Oracle Linux Security Advisories (ELSA) · Apr 16, 2018
References
- RHSA-2018:2185 vendor-advisory
- RHSA-2018:2186 vendor-advisory
- https://github.com/openssl/openssl/commit/898fb884b706aaeb283de4812340bb0bde8476dc
- http://www.oracle.com/technetwork/security-advisory/cpujul2018-4258247.html
- http://www.oracle.com/technetwork/security-advisory/cpujan2018-3236628.html
- https://security.netapp.com/advisory/ntap-20180419-0002/
- FreeBSD-SA-17:12 vendor-advisory
- GLSA-201712-03 vendor-advisory
- 1039978 vdb-entry
- https://www.openssl.org/news/secadv/20171207.txt
- https://www.digitalmunition.me/2017/12/cve-2017-3737-openssl-security-bypass-vulnerability/
- RHSA-2018:0998 vendor-advisory
- http://www.oracle.com/technetwork/security-advisory/cpuapr2018-3678067.html
- DSA-4065 vendor-advisory
- https://cert-portal.siemens.com/productcert/pdf/ssa-179516.pdf
- 102103 vdb-entry
- https://www.tenable.com/security/tns-2017-16
- RHSA-2018:2187 vendor-advisory
- https://security.netapp.com/advisory/ntap-20180117-0002/
- https://security.netapp.com/advisory/ntap-20171208-0001/
- https://www.oracle.com/technetwork/security-advisory/cpujul2019-5072835.html