Inconsistent interpretation of HTTP requests in Apache Traffic Server - CVE-2021-37147

Vulnerability identifier: #VU58639

CSH Severity: Medium

CVSS v4: 5.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N]

CVE-ID: CVE-2021-37147

CWE-ID: CWE-444

Exploitation vector: Remote access

Exploit availability: No public exploit available

The vulnerability allows a remote attacker to preform HTTP request smuggling attacks.

The vulnerability exists due to improper validation of HTTP requests. A remote attacker can send a specially crafted HTTP request to the server and smuggle arbitrary HTTP headers.

Successful exploitation of vulnerability may allow an attacker to poison HTTP cache and perform phishing attacks.

Apache Traffic Server
trafficserver (Debian package)
trafficserver
trafficserver-debuginfo
trafficserver-devel
trafficserver-debugsource
trafficserver-perl
openEuler

Install updates from vendor's website.

Apache Traffic Server - addressed in versions 8.1.3, 9.1.1
trafficserver (Debian package) - addressed in versions 8.0.2+ds-1+deb10u6, 8.1.1+ds-1.1+deb11u1
trafficserver - update to 9.1.0-4
trafficserver-debuginfo - update to 9.1.0-4
trafficserver-devel - update to 9.1.0-4
trafficserver-debugsource - update to 9.1.0-4
trafficserver-perl - update to 9.1.0-4

• https://lists.apache.org/thread/k01797hyncx53659wr3o72s5cvkc3164

• Multiple vulnerabilities in Apache Traffic Server
• Debian update for trafficserver
• openEuler update for trafficserver