Multiple vulnerabilities in Apache Tomcat



Published: 2020-02-21 | Updated: 2022-08-21
Risk High
Patch available YES
Number of vulnerabilities 3
CVE-ID CVE-2020-1938
CVE-2020-1935
CVE-2019-17569
CWE-ID CWE-22
CWE-444
Exploitation vector Network
Public exploit Vulnerability #1 is being exploited in the wild.
Vulnerable software
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Apache Tomcat
Server applications / Web servers

Vendor Apache Foundation

Security Bulletin

This security bulletin contains information about 3 vulnerabilities.

Updated: 21.02.2020

Updated vulnerability description, added link to YouTube video and PoC.

Updated: 28.02.2020

Updated list of affected software, added 6.x version branch.

Updated 06.03.2020

Added vulnerabilities #2-3, changed bulletin title.

1) Path traversal

EUVDB-ID: #VU25502

Risk: High

CVSSv3.1:

CVE-ID: CVE-2020-1938

CWE-ID: CWE-22 - Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')

Exploit availability: Yes

Description

The vulnerability allows a remote attacker to execute arbitrary code on the target system.

The vulnerability exists due to improper input validation in Apache Tomcat AJP connector. A remote attacker can send a specially crafted AJP request, include and execute arbitrary files on the target system.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.

Mitigation

Install update from vendor's website.

Vulnerable software versions

Apache Tomcat: 9.0.0 - 9.0.30, 8.5.0 - 8.5.50, 7.0.0 - 7.0.99, 6.0.0 - 6.0.53


CPE2.3 External links

http://www.jdcloud.com/cn/notice/detail/839/type/5
http://www.youtube.com/watch?v=4g1AWHLLuL8
http://github.com/Kit4y/CNVD-2020-10487-Tomcat-Ajp-lfi-Scanner

Q & A

Can this vulnerability be exploited remotely?

How the attacker can exploit this vulnerability?

Is there known malware, which exploits this vulnerability?

2) Inconsistent interpretation of HTTP requests

EUVDB-ID: #VU25807

Risk: Medium

CVSSv3.1:

CVE-ID: CVE-2020-1935

CWE-ID: CWE-444 - Inconsistent Interpretation of HTTP Requests ('HTTP Request Smuggling')

Exploit availability: No

Description

The vulnerability allows a remote attacker to perform HTTP request smuggling attack.

The vulnerability exists due to the HTTP header parsing code uses an approach to end-of-line parsing that allows some invalid HTTP headers to be parsed as valid. A remote attacker can send a specially crafted HTTP request and perform HTTP request smuggling attack.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Apache Tomcat: 9.0.0 - 9.0.30, 8.5.0 - 8.5.50, 7.0.0 - 7.0.99


CPE2.3 External links

http://lists.apache.org/thread.html/r127f76181aceffea2bd4711b03c595d0f115f63e020348fe925a916c%40%3Cannounce.tomcat.apache.org%3E
http://lists.debian.org/debian-lts-announce/2020/03/msg00006.html

Q & A

Can this vulnerability be exploited remotely?

How the attacker can exploit this vulnerability?

Is there known malware, which exploits this vulnerability?

3) Inconsistent interpretation of HTTP requests

EUVDB-ID: #VU25806

Risk: Medium

CVSSv3.1:

CVE-ID: CVE-2019-17569

CWE-ID: CWE-444 - Inconsistent Interpretation of HTTP Requests ('HTTP Request Smuggling')

Exploit availability: No

Description

The vulnerability allows a remote attacker to perform HTTP request smuggling attack.

The vulnerability exists due to improper input validation when processing a Transfer-Encoding headers. A remote attacker can send a specially crafted HTTP request and perform HTTP request smuggling attack.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Apache Tomcat: 9.0.28 - 9.0.30, 7.0.98 - 7.0.99, 8.5.48 - 8.5.50


CPE2.3 External links

http://lists.apache.org/thread.html/r88def002c5c78534674ca67472e035099fbe088813d50062094a1390%40%3Cannounce.tomcat.apache.org%3E
http://lists.debian.org/debian-lts-announce/2020/03/msg00006.html

Q & A

Can this vulnerability be exploited remotely?

How the attacker can exploit this vulnerability?

Is there known malware, which exploits this vulnerability?



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