Amazon Linux AMI update for tomcat8

1) Inconsistent interpretation of HTTP requests

EUVDB-ID: #VU55423

Risk: Medium

CVSSv4.0: 2.7 [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-2021-33037

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

Exploit availability: No

Description

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

The vulnerability exists due to improper validation of HTTP requests, related to processing of transfer encoding headers.  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.

Mitigation

Update the affected packages:

noarch:
    tomcat8-el-3.0-api-8.5.69-1.88.amzn1.noarch
    tomcat8-docs-webapp-8.5.69-1.88.amzn1.noarch
    tomcat8-jsp-2.3-api-8.5.69-1.88.amzn1.noarch
    tomcat8-javadoc-8.5.69-1.88.amzn1.noarch
    tomcat8-lib-8.5.69-1.88.amzn1.noarch
    tomcat8-servlet-3.1-api-8.5.69-1.88.amzn1.noarch
    tomcat8-8.5.69-1.88.amzn1.noarch
    tomcat8-admin-webapps-8.5.69-1.88.amzn1.noarch
    tomcat8-log4j-8.5.69-1.88.amzn1.noarch
    tomcat8-webapps-8.5.69-1.88.amzn1.noarch

src:
    tomcat8-8.5.69-1.88.amzn1.src

Vulnerable software versions

Amazon Linux AMI: All versions

CPE2.3

• cpe:2.3:o:amazon_web_services:amazon_linux_ami:*:*:*:*:*:*:*:*

External links

https://alas.aws.amazon.com/ALAS-2021-1535.html

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.