Vulnerability identifier: #VU25807

Vulnerability 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

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Apache Tomcat
Server applications / Web servers

Vendor: Apache Foundation

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

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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

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.