CVE-2009-0789 Denial of service in n/a

What is CVE-2009-0789?

CVE-2009-0789 is a medium-severity denial of service vulnerability in Openssl Openssl, published on 27 Mar 2009. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

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.

Weakness: CWE-189

Which versions are affected by CVE-2009-0789?

It affects 1 product.

Products include Openssl Openssl.

How do I fix CVE-2009-0789?

Upgrade to a fixed version.

Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.

Is CVE-2009-0789 being exploited?

There is no known exploitation of CVE-2009-0789 in the wild and no public exploit code.

Other vulnerabilities in Openssl Openssl

• CVE-2009-3245 Null dereference in n/a Critical 10.0
• CVE-2006-3738 Memory corruption in n/a Critical 10.0
• CVE-2026-63073 Untrusted Sender DN Used as Format String in CMP Response Validation Critical 9.8
• CVE-2016-6309 Use after free in n/a Critical 9.8
• CVE-2016-0799 Integer overflow in n/a Critical 9.8

All Openssl Openssl vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as GHSA-cmw6-vcmf-xpcx.