Apache Tomcat up to 6.0.47/7.0.72/8.0.38/8.5.6/9.0.0.M11 HTTP Split input validation

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6.8	$0-$5k	0.00

Summaryinfo

A vulnerability marked as critical has been reported in Apache Tomcat up to 6.0.47/7.0.72/8.0.38/8.5.6/9.0.0.M11. Affected by this vulnerability is an unknown functionality of the component HTTP Handler. The manipulation leads to input validation (Split). This vulnerability is uniquely identified as CVE-2016-6816. The attack is possible to be carried out remotely. Moreover, an exploit is present. It is suggested to upgrade the affected component.

Detailsinfo

A vulnerability was found in Apache Tomcat up to 6.0.47/7.0.72/8.0.38/8.5.6/9.0.0.M11 (Application Server Software). It has been rated as critical. This issue affects an unknown code of the component HTTP Handler. The manipulation with an unknown input leads to a input validation vulnerability (Split). Using CWE to declare the problem leads to CWE-20. The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly. Impacted is confidentiality, integrity, and availability.

The weakness was disclosed 11/08/2016 as Fixed in Apache Tomcat 9.0.0.M13 as confirmed release notes (Website). The advisory is shared at tomcat.apache.org. The identification of this vulnerability is CVE-2016-6816. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. Technical details are unknown but a public exploit is available.

A public exploit has been developed by justpentest in HTTP Request and been published 6 months after the advisory. The exploit is available at exploit-db.com. It is declared as proof-of-concept. We expect the 0-day to have been worth approximately $5k-$25k. The vulnerability scanner Nessus provides a plugin with the ID 900019 (Debian DSA-3738-1 : tomcat7 - security update), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Debian Local Security Checks. The commercial vulnerability scanner Qualys is able to test this issue with plugin 169430 (SUSE Enterprise Linux Security Update for tomcat (SUSE-SU-2016:3081-1)). The code used by the exploit is:

/?a'a%5c'b%22c%3e%3f%3e%25%7d%7d%25%25%3ec%3c[[%3f$%7b%7b%25%7d%7dcake%5c=1
HTTP/1.1

Upgrading to version 6.0.48, 7.0.73, 8.0.39, 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 Exploit-DB (41783), Tenable (900019), SecurityFocus (BID 94461†) and SecurityTracker (ID 1037332†). The entries VDB-93796, VDB-93798, VDB-93799 and VDB-98466 are pretty similar. 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

Version

• 6.0.0
• 6.0.1
• 6.0.2
• 6.0.3
• 6.0.4
• 6.0.5
• 6.0.6
• 6.0.7
• 6.0.8
• 6.0.9
• 6.0.10
• 6.0.11
• 6.0.12
• 6.0.13
• 6.0.14
• 6.0.15
• 6.0.16
• 6.0.17
• 6.0.18
• 6.0.19
• 6.0.20
• 6.0.21
• 6.0.22
• 6.0.23
• 6.0.24
• 6.0.25
• 6.0.26
• 6.0.27
• 6.0.28
• 6.0.29
• 6.0.30
• 6.0.31
• 6.0.32
• 6.0.33
• 6.0.34
• 6.0.35
• 6.0.36
• 6.0.37
• 6.0.38
• 6.0.39
• 6.0.40
• 6.0.41
• 6.0.42
• 6.0.43
• 6.0.44
• 6.0.45
• 6.0.46
• 6.0.47
• 7.0.0
• 7.0.1
• 7.0.2
• 7.0.3
• 7.0.4
• 7.0.5
• 7.0.6
• 7.0.7
• 7.0.8
• 7.0.9
• 7.0.10
• 7.0.11
• 7.0.12
• 7.0.13
• 7.0.14
• 7.0.15
• 7.0.16
• 7.0.17
• 7.0.18
• 7.0.19
• 7.0.20
• 7.0.21
• 7.0.22
• 7.0.23
• 7.0.24
• 7.0.25
• 7.0.26
• 7.0.27
• 7.0.28
• 7.0.29
• 7.0.30
• 7.0.31
• 7.0.32
• 7.0.33
• 7.0.34
• 7.0.35
• 7.0.36
• 7.0.37
• 7.0.38
• 7.0.39
• 7.0.40
• 7.0.41
• 7.0.42
• 7.0.43
• 7.0.44
• 7.0.45
• 7.0.46
• 7.0.47
• 7.0.48
• 7.0.49
• 7.0.50
• 7.0.51
• 7.0.52
• 7.0.53
• 7.0.54
• 7.0.55
• 7.0.56
• 7.0.57
• 7.0.58
• 7.0.59
• 7.0.60
• 7.0.61
• 7.0.62
• 7.0.63
• 7.0.64
• 7.0.65
• 7.0.66
• 7.0.67
• 7.0.68
• 7.0.69
• 7.0.70
• 7.0.71
• 7.0.72
• 8.0.0
• 8.0.1
• 8.0.2
• 8.0.3
• 8.0.4
• 8.0.5
• 8.0.6
• 8.0.7
• 8.0.8
• 8.0.9
• 8.0.10
• 8.0.11
• 8.0.12
• 8.0.13
• 8.0.14
• 8.0.15
• 8.0.16
• 8.0.17
• 8.0.18
• 8.0.19
• 8.0.20
• 8.0.21
• 8.0.22
• 8.0.23
• 8.0.24
• 8.0.25
• 8.0.26
• 8.0.27
• 8.0.28
• 8.0.29
• 8.0.30
• 8.0.31
• 8.0.32
• 8.0.33
• 8.0.34
• 8.0.35
• 8.0.36
• 8.0.37
• 8.0.38
• 8.5.0
• 8.5.1
• 8.5.2
• 8.5.3
• 8.5.4
• 8.5.5
• 8.5.6
• 9.0.0.M11

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: 7.2
VulDB Meta Temp Score: 6.8

VulDB Base Score: 7.3
VulDB Temp Score: 6.6
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 7.1
NVD Vector: 🔍

CVSSv2info

AV	AC	Au	C	I	A
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳

Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock

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

NVD Base Score: 🔍

Exploitinginfo

Name: Split
Class: Input validation / Split
CWE: CWE-20
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Access: Public
Status: Proof-of-Concept
Author: justpentest
Programming Language: 🔍
Download: 🔍

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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

Nessus ID: 900019
Nessus Name: Debian DSA-3738-1 : tomcat7 - security update
Nessus File: 🔍
Nessus Family: 🔍

OpenVAS ID: 703738
OpenVAS Name: Debian Security Advisory DSA 3738-1 (tomcat7 - security update)
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Exploit-DB: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

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

Upgrade: Tomcat 6.0.48/7.0.73/8.0.39/8.5.8/9.0.0.M13

Timelineinfo

08/12/2016 🔍
11/08/2016 +88 days 🔍
11/08/2016 +0 days 🔍
11/22/2016 +14 days 🔍
11/23/2016 +1 days 🔍
11/25/2016 +2 days 🔍
03/20/2017 +115 days 🔍
04/04/2017 +15 days 🔍
04/04/2017 +0 days 🔍
01/19/2025 +2847 days 🔍

Sourcesinfo

Vendor: apache.org

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

CVE: CVE-2016-6816 (🔍)
GCVE (CVE): GCVE-0-2016-6816
GCVE (VulDB): GCVE-100-93797

OVAL: 🔍

SecurityFocus: 94461 - Apache Tomcat CVE-2016-6816 Security Bypass Vulnerability
SecurityTracker: 1037332 - Apache Tomcat Lets Remote Users Conduct HTTP Response Splitting Attacks

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

Entryinfo

Created: 11/25/2016 09:44
Updated: 01/19/2025 10:27
Changes: 11/25/2016 09:44 (55), 04/19/2017 10:32 (27), 10/04/2022 12:59 (3), 10/04/2022 13:06 (11), 01/19/2025 10:27 (14)
Complete: 🔍
Cache ID: 216:192:103

If you want to get the best quality for vulnerability data then you always have to consider VulDB.

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