CVE-2011-4858 describes a denial-of-service vulnerability in Apache Tomcat versions before 5.5.35, 6.0.35, and 7.0.23. This flaw allows remote attackers to consume excessive CPU resources by sending crafted form parameters that exploit predictable hash collisions. With a CVSS score of 5.0 and a FAUCET Risk Score of 99/100, this vulnerability is easily exploitable over the network with low complexity and no authentication, leading to a denial of service. While not on the KEV catalog, a Metasploit module exists for hash table collisions, indicating exploitability, though there is no evidence of active exploitation or significant community discussion.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
5.5.35CPE matchmatch criteria | cpe:2.3:a:apache:tomcat:5.5.35:*:*:*:*:*:*:* | ||
6.0.0CPE matchmatch criteria | cpe:2.3:a:apache:tomcat:6.0.0:*:*:*:*:*:*:* | ||
6.0.1CPE matchmatch criteria | cpe:2.3:a:apache:tomcat:6.0.1:*:*:*:*:*:*:* | ||
6.0.2CPE matchmatch criteria | cpe:2.3:a:apache:tomcat:6.0.2:*:*:*:*:*:*:* | ||
6.0.3CPE matchmatch criteria | cpe:2.3:a:apache:tomcat:6.0.3:*:*:*:*:*:*:* |
CVSS version used by this source: 2.0
AV:N/AC:L/Au:N/C:N/I:N/A:P
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