Multiple vulnerabilities in Apache Tomcat
| 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 Subscribe |
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: 8.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]
CVE-ID: CVE-2020-1938
CWE-ID:
CWE-22 - Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
Exploit availability: Yes
DescriptionThe 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.
MitigationInstall update from vendor's website.
Vulnerable software versionsApache Tomcat: 6.0.0 - 9.0.30
External linkshttp://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?
Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.
How the attacker can exploit this vulnerability?
The attacker would have to send a specially crafted request to the affected application in order to exploit this vulnerability.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability.
2) Inconsistent interpretation of HTTP requests
EUVDB-ID: #VU25807
Risk: Medium
CVSSv3.1: 5.7 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N/E:U/RL:O/RC:C]
CVE-ID: CVE-2020-1935
CWE-ID:
CWE-444 - Inconsistent Interpretation of HTTP Requests ('HTTP Request Smuggling')
Exploit availability: No
DescriptionThe 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. MitigationInstall updates from vendor's website.
Vulnerable software versionsApache Tomcat: 7.0.0 - 9.0.30
External linkshttp://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?
Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.
How the attacker can exploit this vulnerability?
The attacker would have to send a specially crafted request to the affected application in order to exploit this vulnerability.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability.
3) Inconsistent interpretation of HTTP requests
EUVDB-ID: #VU25806
Risk: Medium
CVSSv3.1: 5.7 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N/E:U/RL:O/RC:C]
CVE-ID: CVE-2019-17569
CWE-ID:
CWE-444 - Inconsistent Interpretation of HTTP Requests ('HTTP Request Smuggling')
Exploit availability: No
DescriptionThe 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. MitigationInstall updates from vendor's website.
Vulnerable software versionsApache Tomcat: 7.0.98 - 9.0.30
External linkshttp://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?
Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.
How the attacker can exploit this vulnerability?
The attacker would have to send a specially crafted request to the affected application in order to exploit this vulnerability.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability.
