VDB-93796 · CVE-2016-6817 · Nessus 95829

Apache Tomcat up to 8.5.6/9.0.0.M11 HTTP/2 Header Parser memory corruption

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7.4	$0-$5k	0.00

Summaryinfo

A vulnerability labeled as problematic has been found in Apache Tomcat up to 8.5.6/9.0.0.M11. Affected is an unknown function of the component HTTP/2 Header Parser. Executing a manipulation can lead to memory corruption. This vulnerability is handled as CVE-2016-6817. The attack can be executed remotely. There is not any exploit available. The affected component should be upgraded.

Detailsinfo

A vulnerability was found in Apache Tomcat up to 8.5.6/9.0.0.M11 (Application Server Software). It has been declared as critical. This vulnerability affects an unknown part of the component HTTP/2 Header Parser. 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 availability. CVE summarizes:

The HTTP/2 header parser in Apache Tomcat 9.0.0.M1 to 9.0.0.M11 and 8.5.0 to 8.5.6 entered an infinite loop if a header was received that was larger than the available buffer. This made a denial of service attack possible.

The bug was discovered 11/22/2016. The weakness was released 11/08/2016 as Fixed in Apache Tomcat 9.0.0.M13 as confirmed release notes (Website). The advisory is shared for download at tomcat.apache.org. This vulnerability was named CVE-2016-6817 since 08/12/2016. The exploitation appears to be easy. The attack can be initiated remotely. No form of authentication is required for a successful exploitation. There are neither technical details nor an exploit publicly available.

The vulnerability scanner Nessus provides a plugin with the ID 95829 (Fedora 25 : 1:tomcat (2016-98cca07999)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Fedora Local Security Checks and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 276339 (Fedora Security Update for tomcat (FEDORA-2016-a98c560116)).

Upgrading to version 8.5.8 or 9.0.0.M13 eliminates this vulnerability. A possible mitigation has been published immediately after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at Tenable (95829), SecurityFocus (BID 94462†) and SecurityTracker (ID 1037330†). Entries connected to this vulnerability are available at VDB-93797, VDB-93798, VDB-93799 and VDB-99568. Once again VulDB remains the best source for vulnerability data.

Productinfo

Type

Application Server Software

Vendor

Apache

Name

Tomcat

Version

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: 7.5
VulDB Meta Temp Score: 7.4

VulDB Base Score: 7.5
VulDB Temp Score: 7.2
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 7.5
NVD Vector: 🔍

CNA Base Score: 7.5
CNA Vector: 🔍

CVSSv2info

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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: 🔍

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Nessus ID: 95829
Nessus Name: Fedora 25 : 1:tomcat (2016-98cca07999)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

OpenVAS ID: 801940
OpenVAS Name: Apache Tomcat HTTP2 Denial of Service Vulnerability (Windows)
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

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

Upgrade: Tomcat 8.5.8/9.0.0.M13

Timelineinfo

08/12/2016 🔍
11/08/2016 +88 days 🔍
11/08/2016 +0 days 🔍
11/22/2016 +14 days 🔍
11/22/2016 +0 days 🔍
11/23/2016 +1 days 🔍
11/25/2016 +2 days 🔍
12/15/2016 +20 days 🔍
08/10/2017 +238 days 🔍
10/15/2024 +2623 days 🔍

Sourcesinfo

Vendor: apache.org

Advisory: Fixed in Apache Tomcat 9.0.0.M13
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2016-6817 (🔍)
GCVE (CVE): GCVE-0-2016-6817
GCVE (VulDB): GCVE-100-93796
SecurityFocus: 94462 - Apache Tomcat CVE-2016-6817 Denial of Service Vulnerability
SecurityTracker: 1037330

See also: 🔍

Entryinfo

Created: 11/25/2016 09:44
Updated: 10/15/2024 22:24
Changes: 11/25/2016 09:44 (72), 06/09/2019 08:37 (13), 10/15/2024 22:24 (27)
Complete: 🔍
Cache ID: 216::103