CVE-2011-4577 Denial of service in n/a

What is CVE-2011-4577?

CVE-2011-4577 is a medium-severity denial of service vulnerability in Openssl Openssl, published on 6 Jan 2012. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

OpenSSL before 0.9.8s and 1.x before 1.0.0f, when RFC 3779 support is enabled, allows remote attackers to cause a denial of service (assertion failure) via an X.509 certificate containing certificate-extension data associated with (1) IP address blocks or (2) Autonomous System (AS) identifiers.

Weakness: CWE-399

Which versions are affected by CVE-2011-4577?

It affects 1 product.

Products include Openssl Openssl.

How do I fix CVE-2011-4577?

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-2011-4577 being exploited?

There is no known exploitation of CVE-2011-4577 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 DEBIAN-CVE-2011-4577, GHSA-566r-v75p-wp79.