Amazon Linux AMI update for tomcat7

1) 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

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

Update the affected packages:

noarch:
    tomcat7-javadoc-7.0.107-1.39.amzn1.noarch
    tomcat7-admin-webapps-7.0.107-1.39.amzn1.noarch
    tomcat7-log4j-7.0.107-1.39.amzn1.noarch
    tomcat7-lib-7.0.107-1.39.amzn1.noarch
    tomcat7-el-2.2-api-7.0.107-1.39.amzn1.noarch
    tomcat7-webapps-7.0.107-1.39.amzn1.noarch
    tomcat7-servlet-3.0-api-7.0.107-1.39.amzn1.noarch
    tomcat7-jsp-2.2-api-7.0.107-1.39.amzn1.noarch
    tomcat7-docs-webapp-7.0.107-1.39.amzn1.noarch
    tomcat7-7.0.107-1.39.amzn1.noarch

src:
    tomcat7-7.0.107-1.39.amzn1.src

Vulnerable software versions

Amazon Linux AMI: All versions

External links

http://alas.aws.amazon.com/ALAS-2021-1472.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.