Inconsistent interpretation of HTTP requests in Apache Tomcat - CVE-2020-1935

Vulnerability identifier: #VU25807

CSH Severity: Medium

CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Green

CVE-ID: CVE-2020-1935

CWE-ID: CWE-444

Exploitation vector: Remote access

Exploit availability: No public exploit available

Vendor: Apache Foundation

Affected software:
Apache Tomcat

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.

Install updates from vendor's website.

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