Amazon Linux AMI update for tomcat7



Risk Medium
Patch available YES
Number of vulnerabilities 1
CVE-ID CVE-2021-30640
CWE-ID CWE-287
Exploitation vector Network
Public exploit N/A
Vulnerable software
 Amazon Linux AMI
Operating systems & Components / Operating system

Vendor Amazon Web Services

Security Bulletin

This security bulletin contains one medium risk vulnerability.

1) Improper Authentication

EUVDB-ID: #VU55417

Risk: Medium

CVSSv4.0: 4.8 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:H/VA:N/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2021-30640

CWE-ID: CWE-287 - Improper Authentication

Exploit availability: No

Description

The vulnerability allows a remote attacker to bypass authentication process.

The vulnerability exists due to an error in the JNDI Realm when processing authentication requests. A remote attacker can authenticate using variations of a valid user name and bypass some of the protection provided by the LockOut Realm.

Mitigation

Update the affected packages:

noarch:
    tomcat7-7.0.109-1.41.amzn1.noarch
    tomcat7-lib-7.0.109-1.41.amzn1.noarch
    tomcat7-admin-webapps-7.0.109-1.41.amzn1.noarch
    tomcat7-jsp-2.2-api-7.0.109-1.41.amzn1.noarch
    tomcat7-docs-webapp-7.0.109-1.41.amzn1.noarch
    tomcat7-el-2.2-api-7.0.109-1.41.amzn1.noarch
    tomcat7-webapps-7.0.109-1.41.amzn1.noarch
    tomcat7-log4j-7.0.109-1.41.amzn1.noarch
    tomcat7-servlet-3.0-api-7.0.109-1.41.amzn1.noarch
    tomcat7-javadoc-7.0.109-1.41.amzn1.noarch

src:
    tomcat7-7.0.109-1.41.amzn1.src

Vulnerable software versions

Amazon Linux AMI: All versions

CPE2.3 External links

https://alas.aws.amazon.com/ALAS-2021-1534.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.



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