Go to homepageCyberStrike

Menu

Star on GitHub · 3.2k
Sign inDownload

CVE-2011-1473

5.0 · MEDIUM

OpenSSL before 0.9.8l, and 0.9.8m through 1.x, does not properly restrict client-initiated renegotiation within the SSL and TLS protocols, which might make it easier for remote attackers to cause a…

Published Jun 16, 2012opensslCWE-264EPSS 67.19%

Overview

CVE-2011-1473 is a medium-severity vulnerability affecting openssl openssl. It was published on June 16, 2012 and has a CVSS 2.0 base score of 5.0 (MEDIUM).

This vulnerability has a CVSS 2.0 base score of 5.0, rated MEDIUM. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

Technical description

OpenSSL before 0.9.8l, and 0.9.8m through 1.x, does not properly restrict client-initiated renegotiation within the SSL and TLS protocols, which might make it easier for remote attackers to cause a denial of service (CPU consumption) by performing many renegotiations within a single connection, a different vulnerability than CVE-2011-5094. NOTE: it can also be argued that it is the responsibility of server deployments, not a security library, to prevent or limit renegotiation when it is inappropriate within a specific environment

Remediation

Check the references section for vendor advisories and patches from openssl. Update openssl to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

Affected products

VendorProductVersionsStatus

References

Refarchives.neohapsis.com/archives/bugtraq/2014-02/0061.htmlRefmarc.info/?l=bugtraq&m=133951357207000&w=2Reforchilles.com/2011/03/ssl-renegotiation-dos.htmlRefvincent.bernat.im/en/blog/2011-ssl-dos-mitigation.htmlRefwww.educatedguesswork.org/2011/10/ssltls_and_computational_dos.htmlRefwww.ietf.org/mail-archive/web/tls/current/msg07553.htmlRefwww.ietf.org/mail-archive/web/tls/current/msg07564.htmlRefwww.ietf.org/mail-archive/web/tls/current/msg07567.htmlRefwww.ietf.org/mail-archive/web/tls/current/msg07576.htmlRefwww.ietf.org/mail-archive/web/tls/current/msg07577.html

How CyberStrike helps

Frequently asked questions

What is CVE-2011-1473?

CVE-2011-1473 is a medium-severity vulnerability affecting openssl openssl. It was published on June 16, 2012 and has a CVSS 2.0 base score of 5.0 (MEDIUM).

How severe is CVE-2011-1473?

This vulnerability has a CVSS 2.0 base score of 5.0, rated MEDIUM. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2011-1473?

Check the references section for vendor advisories and patches from openssl. Update openssl to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2011-1473?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2011-1473 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

Related MEDIUM CVEs from 2011

View all
Browse by year2026202520242023202220212020201920182017201620152014201320122011201020092008200720062005200420032002200120001999