Apache Tomcat before 5.5.35, 6.x before 6.0.35, and 7.x before 7.0.23 computes hash values for form parameters without restricting the ability to trigger hash collisions predictably, which allows remote attackers to cause a denial of service (CPU consumption) by sending many crafted parameters.
Published 2012-01-05 19:55:01
Updated 2018-01-09 02:29:01
Source MITRE
View at NVD,   CVE.org
Vulnerability category: Denial of service

Threat overview for CVE-2011-4858

Top countries where our scanners detected CVE-2011-4858
Top open port discovered on systems with this issue 80
IPs affected by CVE-2011-4858 21,361
Threat actors abusing to this issue? Yes
Find out if you* are affected by CVE-2011-4858!
*Directly or indirectly through your vendors, service providers and 3rd parties. Powered by attack surface intelligence from SecurityScorecard.

Exploit prediction scoring system (EPSS) score for CVE-2011-4858

65.13%
Probability of exploitation activity in the next 30 days EPSS Score History
~ 98 %
Percentile, the proportion of vulnerabilities that are scored at or less

Metasploit modules for CVE-2011-4858

  • Hashtable Collisions
    Disclosure Date: 2011-12-28
    First seen: 2020-04-26
    auxiliary/dos/http/hashcollision_dos
    This module uses a denial-of-service (DoS) condition appearing in a variety of programming languages. This vulnerability occurs when storing multiple values in a hash table and all values have the same hash value. This can cause a web server parsing the POST paramete

CVSS scores for CVE-2011-4858

Base Score Base Severity CVSS Vector Exploitability Score Impact Score Score Source First Seen
5.0
MEDIUM AV:N/AC:L/Au:N/C:N/I:N/A:P
10.0
2.9
NIST

CWE ids for CVE-2011-4858

  • Assigned by: nvd@nist.gov (Primary)

References for CVE-2011-4858

Products affected by CVE-2011-4858

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