Amazon Linux AMI update for tomcat8

1) Resource exhaustion

EUVDB-ID: #VU57389

Risk: Medium

CVSSv4.0: 6.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2021-42340

CWE-ID: CWE-400 - Resource exhaustion

Exploit availability: No

Description

The vulnerability allows a remote attacker to perform DoS attack on the target system.

The vulnerability exists due memory leak when processing HTTP connections. A remote attacker can initiate multiple HTTP connections with the web server and consume all available memory on the system.

Mitigation

Update the affected packages:

noarch:
    tomcat8-log4j-8.5.72-1.89.amzn1.noarch
    tomcat8-lib-8.5.72-1.89.amzn1.noarch
    tomcat8-javadoc-8.5.72-1.89.amzn1.noarch
    tomcat8-jsp-2.3-api-8.5.72-1.89.amzn1.noarch
    tomcat8-webapps-8.5.72-1.89.amzn1.noarch
    tomcat8-admin-webapps-8.5.72-1.89.amzn1.noarch
    tomcat8-el-3.0-api-8.5.72-1.89.amzn1.noarch
    tomcat8-servlet-3.1-api-8.5.72-1.89.amzn1.noarch
    tomcat8-docs-webapp-8.5.72-1.89.amzn1.noarch
    tomcat8-8.5.72-1.89.amzn1.noarch

src:
    tomcat8-8.5.72-1.89.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-2021-1546.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.