Description
OpenSSL 0.9.8i and earlier does not properly check the return value from the EVP_VerifyFinal function, which allows remote attackers to bypass validation of the certificate chain via a malformed SSL/TLS signature for DSA and ECDSA keys.
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 | 0.9.8g-15 | — |
| Debian 13 | openssl | 0.9.8g-15 | — |
| Debian 12 | openssl | 0.9.8g-15 | — |
| Debian 4.0 | openssl | 0.9.8c-4etch4 | DSA-1701-1 |
| Debian 4.0 | openssl097 | 0.9.7k-3.1etch2 | DSA-1701-1 |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 5 | openssl +2 | 0.9.8b-10.el5_2.1 | RHSA-2009:0004 |
| RHEL 5 | openssl097a | 0.9.7a-9.el5_2.1 | RHSA-2009:0004 |
| RHEL 4 | openssl +2 | 0.9.7a-43.17.el4_7.2 | RHSA-2009:0004 |
| RHEL 4 | openssl096b | 0.9.6b-22.46.el4_7 | RHSA-2009:0004 |
| RHEL 3 | openssl +2 | 0.9.7a-33.25 | RHSA-2009:0004 |
| RHEL 3 | openssl096b | 0.9.6b-16.49 | RHSA-2009:0004 |
| RHEL 2 | openssl +2 | 0.9.6b-49 | RHSA-2009:0004 |
| RHEL 2 | openssl095a | 0.9.5a-34 | RHSA-2009:0004 |
| RHEL 2 | openssl096 | 0.9.6-34 | RHSA-2009:0004 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | openssl-1_1 | 1.1.1l-1.2 | openSUSE-SU-2024:11127-1 |
Advisories 3
- RHSA-2009:0004 Red Hat Security Advisory: openssl security update Red Hat Security Advisories (RHSA) · Jun 26, 2026
- DSA-1701-1 openssl openssl097 - cryptographic weakness Debian Security (DSA / DLA) · Mar 9, 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
- SSRT090002 vendor-advisory
- http://www.vmware.com/security/advisories/VMSA-2009-0004.html
- SUSE-SU-2011:0847 vendor-advisory
- http://support.apple.com/kb/HT3549
- 20090107 [oCERT-2008-016] Multiple OpenSSL signature verification API misuses mailing-list
- 250826 vendor-advisory
- http://www.openssl.org/news/secadv_20090107.txt
- ADV-2009-0558 vdb-entry
- openSUSE-SU-2011:0845 vendor-advisory
- 1021523 vdb-entry
- ADV-2009-0362 vdb-entry
- GLSA-200902-02 vendor-advisory
- HPSBMA02426 vendor-advisory
- ADV-2009-0289 vdb-entry
- 35074 third-party-advisory
- http://support.avaya.com/elmodocs2/security/ASA-2009-038.htm
- 34211 third-party-advisory
- ADV-2009-0040 vdb-entry
- HPSBOV02540 vendor-advisory
- APPLE-SA-2009-05-12 vendor-advisory
- SSA:2009-014-01 vendor-advisory
- ADV-2009-0904 vdb-entry
- ADV-2009-0913 vdb-entry
- 33557 third-party-advisory
- 33765 third-party-advisory
- http://www.ocert.org/advisories/ocert-2008-016.html
- 33673 third-party-advisory
- 20090401 VMSA-2009-0004 ESX Service Console updates for openssl, bind, and vim mailing-list
- 33436 third-party-advisory
- 35108 third-party-advisory
- TA09-133A third-party-advisory
- http://support.nortel.com/go/main.jsp?cscat=BLTNDETAIL&id=837653
- 33150 vdb-entry
- RHSA-2009:0004 vendor-advisory
- ADV-2009-1297 vdb-entry
- USN-704-1 vendor-advisory
- 33338 third-party-advisory
- ADV-2009-1338 vdb-entry
- 33394 third-party-advisory
- http://voodoo-circle.sourceforge.net/sa/sa-20090123-01.html
- oval:org.mitre.oval:def:6380 vdb-entry signature
- 39005 third-party-advisory
- oval:org.mitre.oval:def:9155 vdb-entry signature