Apache Tomcat up to 6.0.6 resource management

CVSS Meta Temp Score
CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.
Current Exploit Price (≈)
Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.
CTI Interest Score
Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.

A vulnerability, which was classified as problematic, has been found in Apache Tomcat up to 6.0.6 (Application Server Software). Affected by this issue is an unknown part. The manipulation with an unknown input leads to a denial of service vulnerability. Using CWE to declare the problem leads to CWE-399. Impacted is availability.

The weakness was presented 01/05/2012 by Alexander Klink with n.runs AG as RHSA-2012:0475 as confirmed advisory (CERT.org). The advisory is shared for download at kb.cert.org. This vulnerability is handled as CVE-2011-4858 since 12/16/2011. The exploitation is known to be easy. The attack may be launched remotely. No form of authentication is required for exploitation. Technical details are unknown but a public exploit is available.

A public exploit has been developed by Christian Mehlmauer and been published before and not just after the advisory. It is declared as highly functional. The exploit is available at securityfocus.com. The vulnerability was handled as a non-public zero-day exploit for at least 2 days. During that time the estimated underground price was around $5k-$25k. The vulnerability scanner Nessus provides a plugin with the ID 68511 (Oracle Linux 6 : tomcat6 (ELSA-2012-0475)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Oracle Linux Local Security Checks. The commercial vulnerability scanner Qualys is able to test this issue with plugin 119928 (HP-UX Apache Running Tomcat Servlet Engine Remote Denial of Service Vulnerability (HPSBUX02741)).

Upgrading to version 6.0.7 eliminates this vulnerability. Furthermore it is possible to detect and prevent this kind of attack with TippingPoint and the filter 11994.

The vulnerability is also documented in the databases at Vulnerability Center (SBV-34182), Tenable (68511) and Exploit-DB (18305). See 4557, 5200, 5701 and 7354 for similar entries.





CPE 2.3infoedit

CPE 2.2infoedit


VulDB Meta Base Score: 5.3
VulDB Meta Temp Score: 5.1

VulDB Base Score: 5.3
VulDB Temp Score: 5.1
VulDB Vector: 🔍
VulDB Reliability: 🔍



VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍


Class: Denial of service
CWE: CWE-399
ATT&CK: Unknown

Local: No
Remote: Yes

Availability: 🔍
Access: Public
Status: Highly functional
Author: Christian Mehlmauer
Download: 🔍
Price Prediction: 🔍
Current Price Estimation: 🔍


Nessus ID: 68511
Nessus Name: Oracle Linux 6 : tomcat6 (ELSA-2012-0475)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Port: 🔍

OpenVAS ID: 70718
OpenVAS Name: Debian Security Advisory DSA 2401-1 (tomcat6)
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

MetaSploit ID: hashcollision_dos.rb
MetaSploit Name: Hashtable Collisions
MetaSploit File: 🔍

Exploit-DB: 🔍

Threat Intelligenceinfoedit

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍


Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: Tomcat 6.0.7
TippingPoint: 🔍

McAfee IPS: 🔍
McAfee IPS Version: 🔍

PaloAlto IPS: 🔍
Fortigate IPS: 🔍


12/16/2011 🔍
12/29/2011 +13 days 🔍
01/03/2012 +5 days 🔍
01/03/2012 +0 days 🔍
01/05/2012 +2 days 🔍
01/05/2012 +0 days 🔍
01/05/2012 +0 days 🔍
01/08/2012 +3 days 🔍
04/12/2012 +95 days 🔍
07/12/2013 +456 days 🔍
03/23/2015 +619 days 🔍
11/28/2021 +2442 days 🔍


Vendor: https://www.apache.org/

Advisory: RHSA-2012:0475
Researcher: Alexander Klink
Organization: n.runs AG
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2011-4858 (🔍)

Vulnerability Center: 34182 - Apache Tomcat Before 5.5.35, 6.x Before 6.0.35, and 7.x Before 7.0.23 Hash Collision Remote DoS, High
SecurityFocus: 51200 - Apache Tomcat Hash Collision Denial Of Service Vulnerability
Secunia: 48790 - Red Hat update for tomcat5, Less Critical

scip Labs: https://www.scip.ch/en/?labs.20161013
See also: 🔍


Created: 03/23/2015 04:50 PM
Updated: 11/28/2021 05:02 PM
Changes: (2) advisory_identifier source_nessus_risk
Complete: 🔍


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