Description
The SSL/TLS server implementation in OpenSSL 0.9.7 before 0.9.7h and 0.9.8 before 0.9.8a, when using the SSL_OP_MSIE_SSLV2_RSA_PADDING option, disables a verification step that is required for preventing protocol version rollback attacks, which allows remote attackers to force a client and server to use a weaker protocol than needed via a man-in-the-middle attack.
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 | 0.9.8-3 | — |
| Debian 13 | openssl | 0.9.8-3 | — |
| Debian 12 | openssl | 0.9.8-3 | — |
| Debian 3.1 | openssl | 0.9.7e-3sarge1 | DSA-888-1 |
| Debian 3.1 | openssl096 | 0.9.6m-1sarge1 | DSA-881-1 |
| Debian 3.0 | openssl | 0.9.6c-2.woody.8 | DSA-888-1 |
| Debian 3.0 | openssl094 | 0.9.4-6.woody.4 | DSA-875-1 |
| Debian 3.0 | openssl095 | 0.9.5a-6.woody.6 | DSA-882-1 |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 4 | openssl +2 | 0.9.7a-43.4 | RHSA-2005:800 |
| RHEL 4 | openssl096b | 0.9.6b-22.4 | RHSA-2005:800 |
| RHEL 3 | openssl +2 | 0.9.7a-33.17 | RHSA-2005:800 |
| RHEL 3 | openssl096b | 0.9.6b-16.22.4 | RHSA-2005:800 |
Show 2 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Red Hat Network Satellite 5 | rhn-solaris-bootstrap | 5.0.2-3 | RHSA-2008:0629, RHSA-2008:0264 |
| Red Hat Network Satellite 5 | rhn_solaris_bootstrap_5_0_2_3 +1 | 1-0 | RHSA-2008:0629, RHSA-2008:0264 |
| Red Hat Network Satellite 4 | rhn-solaris-bootstrap | 5.0.2-3 | RHSA-2008:0525 |
| Red Hat Network Satellite 4 | rhn_solaris_bootstrap_5_0_2_3 | 1-0 | RHSA-2008:0525 |
Advisories 8
- RHSA-2005:800 Red Hat Security Advisory: openssl security update Red Hat Security Advisories (RHSA) · Jun 26, 2026
- DSA-875-1 openssl094 - cryptographic weakness Debian Security (DSA / DLA) · Mar 9, 2026
- DSA-882-1 openssl095 - cryptographic weakness Debian Security (DSA / DLA) · Mar 9, 2026
- DSA-888-1 openssl - cryptographic weakness Debian Security (DSA / DLA) · Mar 9, 2026
- DSA-881-1 openssl096 - cryptographic weakness Debian Security (DSA / DLA) · Mar 9, 2026
- RHSA-2008:0629 Red Hat Security Advisory: Red Hat Network Satellite Server Solaris client security update Red Hat Security Advisories (RHSA) · Jan 14, 2026
- RHSA-2008:0525 Red Hat Security Advisory: Red Hat Network Satellite Server Solaris client security update Red Hat Security Advisories (RHSA) · Jan 14, 2026
- RHSA-2008:0264 Red Hat Security Advisory: Red Hat Network Satellite Server Solaris client security update Red Hat Security Advisories (RHSA) · Jan 14, 2026
References
- 17259 third-party-advisory
- 23915 third-party-advisory
- SUSE-SA:2005:061 vendor-advisory
- 26893 third-party-advisory
- 17389 third-party-advisory
- ADV-2005-3056 vdb-entry
- ADV-2007-2457 vdb-entry
- http://support.avaya.com/elmodocs2/security/ASA-2006-260.htm
- 17813 third-party-advisory
- 15071 vdb-entry
- 18165 third-party-advisory
- 23340 third-party-advisory
- 18123 third-party-advisory
- DSA-881 vendor-advisory
- http://www-1.ibm.com/support/docview.wss?uid=isg1SSRVHMCHMC_C081516_754
- http://www.hitachi-support.com/security_e/vuls_e/HS07-016_e/index-e.html
- ADV-2005-2659 vdb-entry
- 24799 vdb-entry
- DSA-882 vendor-advisory
- 20051202 Cisco Security Notice: Response to OpenSSL - Potential SSL 2.0 Rollback vendor-advisory
- 17153 third-party-advisory
- SSRT071299 vendor-advisory
- TSLSA-2005-0059 vendor-advisory
- 17191 third-party-advisory
- ADV-2005-2908 vdb-entry
- 1015032 vdb-entry
- https://issues.rpath.com/browse/RPL-1633
- 17344 third-party-advisory
- 19185 third-party-advisory
- ADV-2005-2036 vdb-entry
- http://www.juniper.net/support/security/alerts/PSN-2005-12-025.txt
- 17589 third-party-advisory
- ADV-2005-2710 vdb-entry
- ADV-2005-3002 vdb-entry
- 31492 third-party-advisory
- 17466 third-party-advisory
- RHSA-2008:0629 vendor-advisory
- 17146 third-party-advisory
- 17169 third-party-advisory
- hitachi-hicommand-security-bypass(35287) vdb-entry
- ADV-2007-0343 vdb-entry
- http://support.avaya.com/elmodocs2/security/ASA-2006-031.htm
- 23280 third-party-advisory
- APPLE-SA-2005-11-29 vendor-advisory
- 23843 third-party-advisory
- 17189 third-party-advisory
- 21827 third-party-advisory
- 17288 third-party-advisory
- MDKSA-2005:179 vendor-advisory
- 17632 third-party-advisory
- ADV-2007-0326 vdb-entry
- 17409 third-party-advisory
- 25973 third-party-advisory
- oval:org.mitre.oval:def:11454 vdb-entry signature
- 17888 third-party-advisory
- 17210 third-party-advisory
- DSA-875 vendor-advisory
- ADV-2006-3531 vdb-entry
- http://www.openssl.org/news/secadv_20051011.txt
- 17178 third-party-advisory