Description
Constructed ASN.1 types with a recursive definition (such as can be found in PKCS7) could eventually exceed the stack given malicious input with excessive recursion. This could result in a Denial Of Service attack. There are no such structures used within SSL/TLS that come from untrusted sources so this is considered safe. Fixed in OpenSSL 1.1.0h (Affected 1.1.0-1.1.0g). Fixed in OpenSSL 1.0.2o (Affected 1.0.2b-1.0.2n).
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| OpenSSL | OpenSSL | Fixed in OpenSSL 1.1.0h (Affected 1.1.0-1.1.0g), Fixed in OpenSSL 1.0.2o (Affected 1.0.2b-1.0.2n) | — |
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 | libtomcrypt | 1.18.2-1 | — |
| Debian 14 | openssl | 1.1.0h-1 | — |
| Debian 13 | libtomcrypt | 1.18.2-1 | — |
| Debian 13 | openssl | 1.1.0h-1 | — |
| Debian 12 | libtomcrypt | 1.18.2-1 | — |
| Debian 12 | openssl | 1.1.0h-1 | — |
| Debian 9 | openssl | 1.1.0f-3+deb9u2 | DSA-4157-1 |
| Debian 9 | openssl1.0 | 1.0.2l-2+deb9u3 | DSA-4158-1 |
| Debian 8 | openssl | 1.0.1t-1+deb8u8 | DSA-4157-1 |
Show 1 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 7 | openssl | 1.0.1t-1+deb7u4 | DLA-1330-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 18.04 LTS | openssl | 1.1.0g-2ubuntu3 | — |
| Ubuntu 18.04 LTS | openssl1.0 | 1.0.2n-1ubuntu5 | — |
| Ubuntu 16.04 LTS | openssl | 1.0.2g-1ubuntu4.11 | USN-3611-1 |
| Ubuntu 14.04 LTS | openssl | 1.0.1f-1ubuntu2.24 | USN-3611-1 |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 7 | OVMF +2 | 20180508-3.gitee3198e672e2.el7 | RHSA-2018:3090 |
| 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 JBoss Web Server 3 | tomcat-native | 1.2.17-19.redhat_19.ep7.el6 | RHSA-2019:1711 |
| Red Hat JBoss Web Server 3 | tomcat7 +11 | 7.0.70-34.ep7.el6 | RHSA-2019:1711 |
| Red Hat JBoss Web Server 3 | tomcat8 +11 | 8.0.36-39.ep7.el6 | RHSA-2019:1711 |
| Red Hat JBoss Core Services 1 | jbcs-httpd24 +1 | 1-6.jbcs.el6 | RHSA-2019:0367 |
| Red Hat JBoss Core Services 1 | jbcs-httpd24-apache-commons-daemon-jsvc | 1:1.1.0-3.redhat_2.jbcs.el6 | RHSA-2019:0367 |
| Red Hat JBoss Core Services 1 | jbcs-httpd24-apr +1 | 1.6.3-31.jbcs.el6 | RHSA-2019:0367 |
| Red Hat JBoss Core Services 1 | jbcs-httpd24-apr-util +8 | 1.6.1-24.jbcs.el6 | RHSA-2019:0367 |
| Red Hat JBoss Core Services 1 | jbcs-httpd24-httpd +6 | 2.4.29-35.jbcs.el6 | RHSA-2019:0367 |
| Red Hat JBoss Core Services 1 | jbcs-httpd24-mod_cluster-native | 1.3.8-3.Final_redhat_2.jbcs.el6 | RHSA-2019:0367 |
| Red Hat JBoss Core Services 1 | jbcs-httpd24-mod_jk +2 | 1.2.46-1.redhat_1.jbcs.el6 | RHSA-2019:0367 |
| Red Hat JBoss Core Services 1 | jbcs-httpd24-mod_ssl +1 | 1:2.4.29-35.jbcs.el6 | RHSA-2019:0367 |
| Red Hat JBoss Core Services 1 | jbcs-httpd24-nghttp2 +1 | 1.29.0-9.jbcs.el6 | RHSA-2019:0367 |
| Red Hat JBoss Core Services 1 | jbcs-httpd24-openssl +4 | 1:1.0.2n-14.jbcs.el6 | RHSA-2019:0367 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 15 | ovmf | 2017+git1510945757.b2662641d5-5.3.6 | SUSE-SU-2018:2072-1 |
| SLES 12 SP3 | compat-openssl098 | 0.9.8j-106.6.1 | SUSE-SU-2018:2683-1 |
| SLES 12 SP3 | openssl | 1.0.2j-60.24.1 | SUSE-SU-2018:0925-1 |
| SLES 12 SP3 | ovmf | 2017+git1492060560.b6d11d7c46-4.9.4 | SUSE-SU-2018:2158-1 |
| SLES 12 SP2 | openssl | 1.0.2j-60.24.1 | SUSE-SU-2018:0925-1 |
| SLES 12 SP2 | ovmf | 2015+git1462940744.321151f-19.10.3 | SUSE-SU-2020:0495-1 |
| SLES 12 SP1 | openssl | 1.0.1i-54.11.1 | SUSE-SU-2018:0902-1 |
| SLES 12 | compat-openssl098 | 0.9.8j-106.6.1 | SUSE-SU-2018:2683-1 |
| SLES 12 | openssl | 1.0.1i-27.31.1 | SUSE-SU-2018:0906-1 |
Show 9 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 11 SP4 | openssl | 0.9.8j-0.106.9.1 | SUSE-SU-2018:0975-1 |
| SLES 11 | openssl1 | 1.0.1g-0.58.9.1 | SUSE-SU-2018:0905-1 |
| SUSE Studio Onsite 1.3 | openssl | 0.9.8j-0.106.9.1 | SUSE-SU-2018:0975-1 |
| 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-60.24.1 | SUSE-SU-2018:0925-1 |
| SLES for SAP 12 SP3 | ovmf | 2017+git1492060560.b6d11d7c46-4.9.4 | SUSE-SU-2018:2158-1 |
| 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-60.24.1 | SUSE-SU-2018:0925-1 |
| SLES for SAP 12 SP2 | ovmf | 2015+git1462940744.321151f-19.10.3 | SUSE-SU-2020:0495-1 |
| 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-54.11.1 | SUSE-SU-2018:0902-1 |
| 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-0.106.9.1 | SUSE-SU-2018:0975-1 |
| SUSE OpenStack Cloud 7 | ovmf | 2015+git1462940744.321151f-19.10.3 | SUSE-SU-2020:0495-1 |
| SUSE OpenStack Cloud 6 | openssl | 1.0.1i-54.11.1 | SUSE-SU-2018:0902-1 |
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 | ovmf | 202105-3.4 | openSUSE-SU-2024:11134-1 |
| openSUSE Tumbleweed | virtualbox | 6.1.26-3.2 | openSUSE-SU-2024:11501-1 |
Alpine
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.8 | openssl | 1.0.2o-r0 | — |
| Alpine v3.7 | openssl | 1.0.2o-r0 | — |
| Alpine v3.6 | openssl | 1.0.2o-r0 | — |
| Alpine v3.5 | openssl | 1.0.2o-r0 | — |
| Alpine v3.4 | openssl | 1.0.2o-r0 | — |
Show 1 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.3 | openssl | 1.0.2o-r0 | — |
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 | OVMF | 20180508-3.gitee3198e672e2.el7 | ELSA-2018-3090 |
| Oracle Linux 7 | openssl +4 | 1:1.0.2k-16.0.1.el7 | ELSA-2018-3221 |
Advisories 32
- RHSA-2018:3221 Red Hat Security Advisory: openssl security, bug fix, and enhancement update Red Hat Security Advisories (RHSA) · Oct 16, 2026
- RHSA-2019:1711 Red Hat Security Advisory: Red Hat JBoss Web Server 3.1 Service Pack 7 security and bug fix update Red Hat Security Advisories (RHSA) · Sep 21, 2026
- RHSA-2019:0367 Red Hat Security Advisory: Red Hat JBoss Core Services Apache HTTP Server 2.4.29 security update Red Hat Security Advisories (RHSA) · Sep 21, 2026
- RHSA-2018:3090 Red Hat Security Advisory: ovmf security, bug fix, and enhancement update Red Hat Security Advisories (RHSA) · Sep 21, 2026
- USN-3611-1 openssl vulnerability Ubuntu Security Notices (USN) · Apr 22, 2026
- ICSA-26-076-01 CODESYS in Festo Automation Suite CISA ICS & IT advisories · Mar 17, 2026
- DSA-4158-1 openssl1.0 - security update Debian Security (DSA / DLA) · Mar 9, 2026
- DSA-4157-1 openssl - security update Debian Security (DSA / DLA) · Mar 9, 2026
- DLA-1330-1 openssl - security update Debian Security (DSA / DLA) · Mar 9, 2026
- FSA-202601 Several CODESYS vulnerabilities in Festo Automation Suite CERT@VDE · Feb 26, 2026
- SUSE-SU-2018:2158-1 Security update for ovmf 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-2018:0925-1 Security update for openssl SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2018:2072-1 Security update for ovmf 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-2018:0905-1 Security update for openssl1 SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2018:0975-1 Security update for openssl SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2020:0495-1 Security update for ovmf SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2024:11134-1 ovmf-202105-3.4 on GA media 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-2018:0902-1 Security update for openssl SUSE / openSUSE Security Updates · Feb 4, 2026
- ICSA-25-273-04 Festo Controller CECC-S,-LK,-D Family Firmware (Update A) CISA ICS & IT advisories · Nov 13, 2025
- FSA-202202 Festo: Controller CECC-S,LK,D family <= 2.3.8.1 - multiple vulnerabilities in CODESYS V3 runtime system CERT@VDE · Nov 3, 2025
- WID-SEC-2023-2048 OpenSSL: Mehrere Schwachstellen BSI CERT-Bund (WID) · Oct 20, 2025
- WID-SEC-2025-1212 Oracle Communications Applications: Mehrere Schwachstellen BSI CERT-Bund (WID) · Jun 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
- SUSE-SU-2018:0906-1 Security update for openssl SUSE / openSUSE Security Updates · May 2, 2025
- WID-SEC-2023-1969 HPE Fabric OS: Mehrere Schwachstellen ermöglichen Privilegieneskalation BSI CERT-Bund (WID) · Aug 6, 2023
- 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-2018-3090 Moderate: ovmf security, bug fix, and enhancement update (Oracle Linux 7) Oracle Linux Security Advisories (ELSA) · Nov 5, 2018
References
- USN-3611-2 vendor-advisory
- DSA-4158 vendor-advisory
- GLSA-201811-21 vendor-advisory
- RHSA-2019:0367 vendor-advisory
- DSA-4157 vendor-advisory
- RHSA-2018:3505 vendor-advisory
- 103518 vdb-entry
- 1040576 vdb-entry
- RHSA-2018:3221 vendor-advisory
- 105609 vdb-entry
- USN-3611-1 vendor-advisory
- [debian-lts-announce] 20180330 [SECURITY] [DLA 1330-1] openssl security update mailing-list
- RHSA-2019:0366 vendor-advisory
- RHSA-2018:3090 vendor-advisory
- RHSA-2019:1711 vendor-advisory
- RHSA-2019:1712 vendor-advisory
- http://www.oracle.com/technetwork/security-advisory/cpujul2018-4258247.html
- http://www.oracle.com/technetwork/security-advisory/cpuapr2018-3678067.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://security.netapp.com/advisory/ntap-20180726-0002/
- GLSA-202007-53 vendor-advisory
- https://securityadvisories.paloaltonetworks.com/Home/Detail/133
- https://www.oracle.com//security-alerts/cpujul2021.html
- https://www.tenable.com/security/tns-2018-07
- https://www.tenable.com/security/tns-2018-04
- https://nodejs.org/en/blog/vulnerability/march-2018-security-releases/
- https://git.openssl.org/gitweb/?p=openssl.git%3Ba=commitdiff%3Bh=2ac4c6f7b2b2af20c0e2b0ba05367e454cd11b33
- https://git.openssl.org/gitweb/?p=openssl.git%3Ba=commitdiff%3Bh=9310d45087ae546e27e61ddf8f6367f29848220d
- https://www.tenable.com/security/tns-2018-06
- https://security.netapp.com/advisory/ntap-20180330-0002/
- https://www.openssl.org/news/secadv/20180327.txt