Description
The get_client_master_key function in s2_srvr.c in the SSLv2 implementation in OpenSSL before 0.9.8zf, 1.0.0 before 1.0.0r, 1.0.1 before 1.0.1m, and 1.0.2 before 1.0.2a accepts a nonzero CLIENT-MASTER-KEY CLEAR-KEY-LENGTH value for an arbitrary cipher, which allows man-in-the-middle attackers to determine the MASTER-KEY value and decrypt TLS ciphertext data by leveraging a Bleichenbacher RSA padding oracle, a related issue to CVE-2016-0800.
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 | 1.0.0c-2 | — |
| Debian 13 | openssl | 1.0.0c-2 | — |
| Debian 12 | openssl | 1.0.0c-2 | — |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 7 | openssl +4 | 1:1.0.1e-42.ael7b_1.4 | RHSA-2015:0716 |
| RHEL 7 | openssl098e | 0.9.8e-29.el7_2.3 | RHSA-2016:0372 |
| RHEL 6 | openssl +3 | 1.0.1e-30.el6_6.7 | RHSA-2015:0715 |
| RHEL 6 | openssl098e | 0.9.8e-20.el6_7.1 | RHSA-2016:0372 |
| RHEL 5 | openssl +2 | 0.9.8e-33.el5_11 | RHSA-2015:0800 |
Show 7 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Red Hat Rhel Mission Critical 6 | openssl +3 | 1.0.0-20.el6_2.8 | RHSA-2016:0303 |
| Red Hat Rhel Mission Critical 5 | openssl +2 | 0.9.8e-12.el5_6.13 | RHSA-2016:0304 |
| RHEL 6.5 AUS | openssl +3 | 1.0.1e-16.el6_5.16 | RHSA-2016:0303 |
| RHEL 6.4 AUS | openssl +3 | 1.0.0-27.el6_4.5 | RHSA-2016:0303 |
| RHEL 5.9 AUS | openssl +2 | 0.9.8e-26.el5_9.5 | RHSA-2016:0304 |
| RHEL 4 ELS | openssl +2 | 0.9.7a-43.23.el4 | RHSA-2016:0306 |
| Red Hat Gluster Storage 2 | openssl +3 | 1.0.1e-30.el6_6.7 | RHSA-2015:0752 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 12 SP1 | compat-openssl098 | 0.9.8j-94.1 | SUSE-SU-2016:0641-1 |
| SLES 12 SP1 | openssl | 1.0.1i-44.1 | SUSE-SU-2016:0620-1 |
| SLES 12 | compat-openssl098 | 0.9.8j-94.1 | SUSE-SU-2016:0641-1 |
| SLES 12 | openssl | 1.0.1i-27.13.1 | SUSE-SU-2016:0617-1 |
| SLES 11 SP4 | compat-openssl097g | 0.9.7g-146.22.41.1 | SUSE-SU-2016:0631-1 |
| SLES 11 SP4 | openssl | 0.9.8j-0.89.1 | SUSE-SU-2016:0624-1 |
| SLES 11 SP3 | openssl | 0.9.8j-0.89.1 | SUSE-SU-2016:0624-1 |
| SLES 11 SP2 | openssl | 0.9.8j-0.89.1 | SUSE-SU-2016:0624-1 |
Show 8 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 11 | openssl1 | 1.0.1g-0.40.1 | SUSE-SU-2016:0621-1 |
| SUSE Studio Onsite 1.3 | openssl | 0.9.8j-0.89.1 | SUSE-SU-2016:0624-1 |
| SLES for SAP 12 SP1 | compat-openssl098 | 0.9.8j-94.1 | SUSE-SU-2016:0641-1 |
| SLES for SAP 12 SP1 | openssl | 1.0.1i-44.1 | SUSE-SU-2016:0620-1 |
| SLES for SAP 12 | openssl | 1.0.1i-27.13.1 | SUSE-SU-2016:0617-1 |
| SLES for SAP 11 SP4 | compat-openssl097g | 0.9.7g-146.22.41.1 | SUSE-SU-2016:0631-1 |
| SLES for SAP 11 SP4 | openssl | 0.9.8j-0.89.1 | SUSE-SU-2016:0624-1 |
| SUSE OpenStack Cloud 5 | openssl | 0.9.8j-0.91.1 | SUSE-SU-2016:1057-1 |
| SUSE Manager Proxy 2.1 | openssl | 0.9.8j-0.91.1 | SUSE-SU-2016:1057-1 |
| SUSE Manager 2.1 | openssl | 0.9.8j-0.91.1 | SUSE-SU-2016:1057-1 |
Oracle Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Oracle Linux 7 | openssl098e | 0.9.8e-29.el7_2.3 | ELSA-2016-0372 |
Advisories 20
- RHSA-2015:0752 Red Hat Security Advisory: openssl security update Red Hat Security Advisories (RHSA) · Sep 21, 2026
- RHSA-2015:0715 Red Hat Security Advisory: openssl security update Red Hat Security Advisories (RHSA) · Sep 21, 2026
- RHSA-2015:0716 Red Hat Security Advisory: openssl security and bug fix update Red Hat Security Advisories (RHSA) · Sep 21, 2026
- RHSA-2016:0372 Red Hat Security Advisory: openssl098e security update Red Hat Security Advisories (RHSA) · Aug 5, 2026
- RHSA-2016:0306 Red Hat Security Advisory: openssl security update Red Hat Security Advisories (RHSA) · Aug 5, 2026
- RHSA-2016:0304 Red Hat Security Advisory: openssl security update Red Hat Security Advisories (RHSA) · Aug 5, 2026
- RHSA-2016:0303 Red Hat Security Advisory: openssl security update Red Hat Security Advisories (RHSA) · Aug 5, 2026
- RHSA-2015:0800 Red Hat Security Advisory: openssl security update Red Hat Security Advisories (RHSA) · Aug 5, 2026
- SUSE-SU-2016:0621-1 Security update for openssl SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2016:0641-1 Security update for openssl SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2016:1057-1 Security update for openssl SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2016:0617-1 Security update for openssl SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2016:0620-1 Security update for openssl SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2016:0624-1 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-2023-0427 OpenSSL: Mehrere Schwachstellen BSI CERT-Bund (WID) · Nov 2, 2025
- SUSE-SU-2016:0631-1 Security update for compat-openssl097g SUSE / openSUSE Security Updates · May 2, 2025
- 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
- ELSA-2016-0372 Important: openssl098e security update (Oracle Linux 7) Oracle Linux Security Advisories (ELSA) · Mar 9, 2016
References
- http://www.oracle.com/technetwork/security-advisory/cpujan2018-3236628.html
- 83743 vdb-entry
- openSUSE-SU-2016:0638 vendor-advisory
- FreeBSD-SA-16:12 vendor-advisory
- http://www.oracle.com/technetwork/topics/security/linuxbulletinjan2016-2867209.html
- SUSE-SU-2016:0621 vendor-advisory
- http://www.oracle.com/technetwork/topics/security/bulletinapr2016-2952098.html
- SUSE-SU-2016:1057 vendor-advisory
- https://kb.pulsesecure.net/articles/Pulse_Security_Advisories/SA40168
- https://drownattack.com
- https://git.openssl.org/?p=openssl.git%3Ba=commit%3Bh=ae50d8270026edf5b3c7f8aaa0c6677462b33d97
- http://openssl.org/news/secadv/20160301.txt
- 20160302 Multiple Vulnerabilities in OpenSSL Affecting Cisco Products: March 2016 vendor-advisory
- openSUSE-SU-2016:0720 vendor-advisory
- SUSE-SU-2016:0624 vendor-advisory
- https://h20566.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c05141441
- https://h20566.www2.hpe.com/hpsc/doc/public/display?docLocale=en_US&docId=emr_na-hpesbhf03741en_us
- SUSE-SU-2016:0631 vendor-advisory
- https://www.openssl.org/news/secadv/20160301.txt
- SUSE-SU-2016:0617 vendor-advisory
- GLSA-201603-15 vendor-advisory
- http://www.oracle.com/technetwork/topics/security/bulletinjan2016-2867206.html
- openSUSE-SU-2016:0628 vendor-advisory
- 1035133 vdb-entry
- SUSE-SU-2016:0678 vendor-advisory
- SUSE-SU-2016:0620 vendor-advisory
- openSUSE-SU-2016:0637 vendor-advisory
- SUSE-SU-2016:0641 vendor-advisory
- http://kb.juniper.net/InfoCenter/index?page=content&id=JSA10759
- https://www.arista.com/en/support/advisories-notices/security-advisories/1260-security-advisory-18
- https://cert-portal.siemens.com/productcert/pdf/ssa-412672.pdf