Medium 5.0Published Mar 27, 2009

CVE-2009-0789OpenSSL before 0.9.8k on WIN64 and certain other platforms does not properly handle a malformed ASN.1 structure, which allows remote attackers to cause a denial of service (invalid memory access and…

Updated under an hour ago (Nov 2, 2026, 12:10 AM ET)

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OpenSSL before 0.9.8k on WIN64 and certain other platforms does not properly handle a malformed ASN.1 structure, which allows remote attackers to cause a denial of service (invalid memory access and application crash) by placing this structure in the public key of a certificate, as demonstrated by an RSA public key.

CVSS: 5.0 MEDIUM (v2.0, NVD)AV:N/AC:L/Au:N/C:N/I:N/A:P
Weakness (CWE): CWE-189
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: Not given
NVD analysis: Modified
Record last updated: Jun 16, 2026
First seen by InfoSec Signals: Nov 1, 2026

Affected products

Affected products

openssl openssl openssl:openssl	through 0.9.8j; 0.9.1c; 0.9.2b; 0.9.3; 0.9.3a; 0.9.4; 0.9.5; 0.9.5; and 54 more ranges	NVD

References

References

http://lists.apple.com/archives/security-announce/2009/Sep/msg00004.html
http://lists.opensuse.org/opensuse-security-announce/2009-05/msg00000.html
http://lists.opensuse.org/opensuse-security-announce/2011-07/msg00013.html
http://lists.opensuse.org/opensuse-security-announce/2011-07/msg00014.html
http://marc.info/?l=bugtraq&m=124464882609472&w=2
http://marc.info/?l=bugtraq&m=127678688104458&w=2
http://secunia.com/advisories/34411	vendor-advisory
http://secunia.com/advisories/34460	vendor-advisory
http://secunia.com/advisories/34666
http://secunia.com/advisories/35065
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The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.