Description
The regular expression engine (regex.c) in Ruby 1.8.5 and earlier, 1.8.6 through 1.8.6-p286, 1.8.7 through 1.8.7-p71, and 1.9 through r18423 allows remote attackers to cause a denial of service (infinite loop and crash) via multiple long requests to a Ruby socket, related to memory allocation failure, and as demonstrated against Webrick.
Remediation
References
Related Vulnerabilities
Jboss EAP Deserialization of Untrusted Data Vulnerability (CVE-2017-12149)
WebLogic Observable Discrepancy Vulnerability (CVE-2019-3740)
Joomla Exposure of Sensitive Information to an Unauthorized Actor Vulnerability (CVE-2011-2891)
Apache HTTP Server Other Vulnerability (CVE-2001-0731)
WordPress Plugin Count per Day Information Disclosure (3.2.5)