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

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.
9.6	$0-$5k	0.00

Summaryinfo

A vulnerability marked as critical has been reported in Apache Tomcat JK ISAPI Connector up to 1.2.41. Affected is an unknown function of the file jk_uri_worker_map.c. This manipulation causes memory corruption. The identification of this vulnerability is CVE-2016-6808. It is possible to initiate the attack remotely. There is no exploit available. Applying a patch is the recommended action to fix this issue.

Detailsinfo

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 product 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 summary by CVE is:

Buffer overflow in Apache Tomcat Connectors (mod_jk) before 1.2.42.

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 l.

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 Tenable (96824), SecurityFocus (BID 93429†) and SecurityTracker (ID 1036969†). Additional details are provided at svn.apache.org. The entry VDB-36981 is related to this item. If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Productinfo

Type

• Application Server Software

Vendor

• Apache

Name

• Tomcat JK ISAPI Connector

Version

• 1.2.0
• 1.2.1
• 1.2.2
• 1.2.3
• 1.2.4
• 1.2.5
• 1.2.6
• 1.2.7
• 1.2.8
• 1.2.9
• 1.2.10
• 1.2.11
• 1.2.12
• 1.2.13
• 1.2.14
• 1.2.15
• 1.2.16
• 1.2.17
• 1.2.18
• 1.2.19
• 1.2.20
• 1.2.21
• 1.2.22
• 1.2.23
• 1.2.24
• 1.2.25
• 1.2.26
• 1.2.27
• 1.2.28
• 1.2.29
• 1.2.30
• 1.2.31
• 1.2.32
• 1.2.33
• 1.2.34
• 1.2.35
• 1.2.36
• 1.2.37
• 1.2.38
• 1.2.39
• 1.2.40
• 1.2.41

License

• open-source

Website

• Vendor: https://www.apache.org/

CPE 2.3info

• 🔍
• 🔍
• 🔍

CPE 2.2info

• 🔍
• 🔍
• 🔍

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

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

AV	AC	Au	C	I	A
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💳	💳	💳	💳	💳	💳
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Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Memory corruption
CWE: CWE-119
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

0-Day	Unlock	Unlock	Unlock	Unlock
Today	Unlock	Unlock	Unlock	Unlock

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

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

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Patch
Status: 🔍

Reaction Time: 🔍
0-Day Time: 🔍
Exposure Time: 🔍

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 (🔍)
GCVE (CVE): GCVE-0-2016-6808
GCVE (VulDB): GCVE-100-92509
SecurityFocus: 93429 - Apache Tomcat JK Connector CVE-2016-6808 Remote Buffer Overflow Vulnerability
SecurityTracker: 1036969

Misc.: 🔍
See also: 🔍

Entryinfo

Created: 10/08/2016 19:09
Updated: 09/22/2022 17:17
Changes: 10/08/2016 19:09 (75), 05/07/2019 17:04 (11), 09/22/2022 17:09 (3), 09/22/2022 17:17 (1)
Complete: 🔍
Cache ID: 216::103

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