Description
OpenSSL 0.9.7 before 0.9.7l, 0.9.8 before 0.9.8d, and earlier versions allows attackers to cause a denial of service (CPU consumption) via parasitic public keys with large (1) "public exponent" or (2) "public modulus" values in X.509 certificates that require extra time to process when using RSA signature verification.
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 |
Advisories 8
- 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
- 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
- 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
- USN-353-2 vendor-advisory
- http://support.attachmate.com/techdocs/2374.html
- ADV-2006-4750 vdb-entry
- http://www.vmware.com/support/esx21/doc/esx-213-200612-patch.html
- http://www.uniras.gov.uk/niscc/docs/re-20060928-00661.pdf?lang=en
- 23915 third-party-advisory
- 201534 vendor-advisory
- HPSBMA02250 vendor-advisory
- 1016943 vdb-entry
- 23038 third-party-advisory
- 2006-0054 vendor-advisory
- DSA-1195 vendor-advisory
- 23309 third-party-advisory
- 26893 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
- 31531 third-party-advisory
- http://www.arkoon.fr/upload/alertes/37AK-2006-06-FR-1.1_FAST360_OPENSSL_ASN1.pdf
- 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
- https://issues.rpath.com/browse/RPL-1633
- 25889 third-party-advisory
- ADV-2006-4036 vdb-entry
- oval:org.mitre.oval:def:10311 vdb-entry signature
- ADV-2006-4019 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
- 22626 third-party-advisory
- openssl-publickey-dos(29230) vdb-entry
- 22083 vdb-entry
- MDKSA-2006:178 vendor-advisory
- 23351 third-party-advisory
- ADV-2006-3869 vdb-entry