Description
The get_server_hello function in the SSLv2 client code in OpenSSL 0.9.7 before 0.9.7l, 0.9.8 before 0.9.8d, and earlier versions allows remote servers to cause a denial of service (client crash) via unknown vectors that trigger a null pointer dereference.
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 | 0.9.8c-2 | — |
| Debian 13 | openssl | 0.9.8c-2 | — |
| Debian 12 | openssl | 0.9.8c-2 | — |
| Debian 3.1 | openssl | 0.9.7e-3sarge4 | DSA-1185-2 |
| Debian 3.1 | openssl096 | 0.9.6m-1sarge4 | DSA-1195-1 |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 4 | openssl +2 | 0.9.7a-43.14 | RHSA-2006:0695 |
| RHEL 4 | openssl096b | 0.9.6b-22.46 | RHSA-2006:0695 |
| RHEL 3 | openssl +2 | 0.9.7a-33.21 | RHSA-2006:0695 |
| RHEL 3 | openssl096b | 0.9.6b-16.46 | RHSA-2006:0695 |
| RHEL 2 | openssl +2 | 0.9.6b-46 | RHSA-2006:0695 |
| RHEL 2 | openssl095a | 0.9.5a-32 | RHSA-2006:0695 |
| RHEL 2 | openssl096 | 0.9.6-32 | RHSA-2006:0695 |
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 |
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 |
Public exploits
Exploit or proof-of-concept code for this vulnerability is publicly available, which lowers the bar for attackers. Treat it as a reason to patch sooner.
Third-party code, not reviewed by us. Public PoCs are sometimes fake or contain malware. Read the code first and run it only in an isolated lab, against systems you are authorised to test.
Exploit-DB 2
- OpenSSL < 0.9.7l/0.9.8d - SSLv2 Client Crash EDB-4773 · dos · Dec 23, 2007 · verified
- OpenSSL SSLv2 - Null Pointer Dereference Client Denial of Service EDB-28726 · dos · Sep 28, 2006 · verified
Sources: PoC-in-GitHub, Metasploit Framework, Exploit-DB — updated daily. Only links are listed; no exploit code is hosted here.
Advisories 8
- RHSA-2008:0629 Red Hat Security Advisory: Red Hat Network Satellite Server Solaris client security update Red Hat Security Advisories (RHSA) · Nov 13, 2026
- RHSA-2008:0264 Red Hat Security Advisory: Red Hat Network Satellite Server Solaris client security update Red Hat Security Advisories (RHSA) · Nov 13, 2026
- RHSA-2008:0525 Red Hat Security Advisory: Red Hat Network Satellite Server Solaris client security update Red Hat Security Advisories (RHSA) · Nov 13, 2026
- RHSA-2006:0695 Red Hat Security Advisory: openssl security update Red Hat Security Advisories (RHSA) · Jun 26, 2026
- DSA-1185-2 openssl Debian Security (DSA / DLA) · Mar 9, 2026
- DSA-1195-1 openssl096 Debian Security (DSA / DLA) · Mar 9, 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
- openSUSE-SU-2024:11127-1 libopenssl-1_1-devel-1.1.1l-1.2 on GA media SUSE / openSUSE Security Updates · May 7, 2025
References
- MDKSA-2006:172 vendor-advisory
- 22212 third-party-advisory
- ADV-2006-4750 vdb-entry
- 4773 exploit
- http://www.vmware.com/support/esx21/doc/esx-213-200612-patch.html
- 23915 third-party-advisory
- HPSBMA02250 vendor-advisory
- 1016943 vdb-entry
- 23038 third-party-advisory
- 2006-0054 vendor-advisory
- openssl-sslv2-client-dos(29240) vdb-entry
- DSA-1195 vendor-advisory
- 23309 third-party-advisory
- http://www.vmware.com/support/vi3/doc/esx-3069097-patch.html
- ADV-2006-4401 vdb-entry
- USN-353-1 vendor-advisory
- http://sourceforge.net/project/shownotes.php?release_id=461863&group_id=69227
- 22116 third-party-advisory
- SSRT071304 vendor-advisory
- http://support.avaya.com/elmodocs2/security/ASA-2006-260.htm
- GLSA-200612-11 vendor-advisory
- 22166 third-party-advisory
- RHSA-2006:0695 vendor-advisory
- 23340 third-party-advisory
- 22385 third-party-advisory
- SUSE-SR:2006:024 vendor-advisory
- 22758 third-party-advisory
- 22487 third-party-advisory
- SUSE-SA:2006:058 vendor-advisory
- 22772 third-party-advisory
- SSRT071299 vendor-advisory
- FreeBSD-SA-06:23.openssl vendor-advisory
- 22165 third-party-advisory
- http://docs.info.apple.com/article.html?artnum=304829
- 20060928 [SECURITY] OpenSSL 0.9.8d and 0.9.7l released mailing-list
- 23794 third-party-advisory
- SSRT090208 vendor-advisory
- 22220 third-party-advisory
- 23680 third-party-advisory
- http://openvpn.net/changelog.html
- http://www.vmware.com/support/server/doc/releasenotes_server.html
- 25889 third-party-advisory
- ADV-2006-4036 vdb-entry
- [3.9] 20061007 013: SECURITY FIX: October 7, 2006 vendor-advisory
- http://www.vmware.com/support/ace2/doc/releasenotes_ace2.html
- 30124 third-party-advisory
- http://www.ingate.com/relnote-452.php
- 22626 third-party-advisory
- 29263 vdb-entry
- 22083 vdb-entry
- MDKSA-2006:178 vendor-advisory
- ADV-2006-3869 vdb-entry
- 22544 third-party-advisory
- 22298 third-party-advisory
- http://www.vmware.com/support/player2/doc/releasenotes_player2.html
- 22130 third-party-advisory
- 25420 third-party-advisory
- 31492 third-party-advisory
- ADV-2007-1973 vdb-entry
- 22284 third-party-advisory