Apache Tomcat JK ISAPI Connector up to 1.2.41 jk_uri_worker_map.c memory corruption

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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9.6$0-$5k0.00

A vulnerability was found in Apache Tomcat JK ISAPI Connector up to 1.2.41 (Application Server Software). It has been declared as very critical. Affected by this vulnerability is an unknown code of the file jk_uri_worker_map.c. The manipulation with an unknown input leads to a memory corruption vulnerability. The CWE definition for the vulnerability is CWE-119. The software performs operations on a memory buffer, but it can read from or write to a memory location that is outside of the intended boundary of the buffer. As an impact it is known to affect confidentiality, integrity, and availability.

The weakness was shared 10/06/2016 as confirmed advisory (Website). The advisory is shared at tomcat.apache.org. This vulnerability is known as CVE-2016-6808 since 08/12/2016. The exploitation appears to be easy. The attack can be launched remotely. The exploitation doesn't need any form of authentication. Technical details are known, but no exploit is available. The price for an exploit might be around USD $0-$5k at the moment (estimation calculated on 09/22/2022). The advisory points out:

The IIS/ISAPI specific code implements special handling when a virtual host is present. The virtual host name and the URI are concatenated to create a virtual host mapping rule. The length checks prior to writing to the target buffer for this rule did not take account of the length of the virtual host name, creating the potential for a buffer overflow.
The report does not confirm code execution.

The vulnerability scanner Nessus provides a plugin with the ID 96824 (RHEL 6 : JBoss Core Services (RHSA-2017:0193)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Red Hat Local Security Checks and running in the context local.

Applying the patch Revision 1762057 is able to eliminate this problem. The bugfix is ready for download at svn.apache.org. A possible mitigation has been published immediately after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at SecurityTracker (ID 1036969) and Tenable (96824). Additional details are provided at svn.apache.org. The entry 36981 is related to this item.

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CVSSv3info

VulDB Meta Base Score: 9.8
VulDB Meta Temp Score: 9.6

VulDB Base Score: 9.8
VulDB Temp Score: 9.4
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 9.8
NVD Vector: 🔍

CVSSv2info

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Exploitinginfo

Class: Memory corruption
CWE: CWE-119
ATT&CK: Unknown

Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

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Nessus ID: 96824
Nessus Name: RHEL 6 : JBoss Core Services (RHSA-2017:0193)
Nessus File: 🔍
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Nessus Context: 🔍

OpenVAS ID: 802665
OpenVAS Name: Apache Tomcat JK Connector Buffer Overflow Vulnerability (Linux)
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OpenVAS Family: 🔍

Threat Intelligenceinfo

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Countermeasuresinfo

Recommended: Patch
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Patch: Revision 1762057

Timelineinfo

08/12/2016 🔍
10/06/2016 +55 days 🔍
10/06/2016 +0 days 🔍
10/06/2016 +0 days 🔍
10/06/2016 +0 days 🔍
10/08/2016 +2 days 🔍
01/27/2017 +111 days 🔍
04/12/2017 +75 days 🔍
09/22/2022 +1989 days 🔍

Sourcesinfo

Vendor: apache.org

Advisory: RHSA-2017:0193
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2016-6808 (🔍)
SecurityTracker: 1036969
SecurityFocus: 93429 - Apache Tomcat JK Connector CVE-2016-6808 Remote Buffer Overflow Vulnerability

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Entryinfo

Created: 10/08/2016 07:09 PM
Updated: 09/22/2022 05:17 PM
Changes: (1) advisory_identifier
Complete: 🔍

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