Amazon Linux AMI update for tomcat7, tomcat8

Published: 2017-10-02 | Updated: 2017-10-06

Risk	Low
Patch available	YES
Number of vulnerabilities	1
CVE-ID	CVE-2017-7674
CWE-ID	CWE-20
Exploitation vector	Network
Public exploit	N/A
Vulnerable software Subscribe	Amazon Linux AMI Operating systems & Components / Operating system
Vendor	Amazon Web Services

Security Bulletin

This security bulletin contains one low risk vulnerability.

1) Improper input validation

EUVDB-ID: #VU8697

Risk: Low

CVSSv3.1: 5.3 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2017-7674

CWE-ID: CWE-20 - Improper input validation

Exploit availability: No

Description

The vulnerability allows a remote attacker to conduct client and server side cache poisoning.

The weakness exists due to the failure to add an HTTP Vary header indicating that the response varies depending on Origin by the CORS Filter. A remote attacker can trick the victim to follow a specially crafted link and conduct client and server side cache poisoning.

Successful exploitation of this vulnerability may allow a remote attacker to steal potentially sensitive information, change appearance of the web page, perform phishing and drive-by-download attacks

Mitigation

Update the affected packages.

noarch:
    tomcat7-7.0.81-1.29.amzn1.noarch
    tomcat7-lib-7.0.81-1.29.amzn1.noarch
    tomcat7-webapps-7.0.81-1.29.amzn1.noarch
    tomcat7-javadoc-7.0.81-1.29.amzn1.noarch
    tomcat7-servlet-3.0-api-7.0.81-1.29.amzn1.noarch
    tomcat7-docs-webapp-7.0.81-1.29.amzn1.noarch
    tomcat7-log4j-7.0.81-1.29.amzn1.noarch
    tomcat7-el-2.2-api-7.0.81-1.29.amzn1.noarch
    tomcat7-jsp-2.2-api-7.0.81-1.29.amzn1.noarch
    tomcat7-admin-webapps-7.0.81-1.29.amzn1.noarch
    tomcat8-servlet-3.1-api-8.0.46-1.76.amzn1.noarch
    tomcat8-docs-webapp-8.0.46-1.76.amzn1.noarch
    tomcat8-el-3.0-api-8.0.46-1.76.amzn1.noarch
    tomcat8-log4j-8.0.46-1.76.amzn1.noarch
    tomcat8-webapps-8.0.46-1.76.amzn1.noarch
    tomcat8-8.0.46-1.76.amzn1.noarch
    tomcat8-admin-webapps-8.0.46-1.76.amzn1.noarch
    tomcat8-javadoc-8.0.46-1.76.amzn1.noarch
    tomcat8-jsp-2.3-api-8.0.46-1.76.amzn1.noarch
    tomcat8-lib-8.0.46-1.76.amzn1.noarch

src:
    tomcat7-7.0.81-1.29.amzn1.src
    tomcat8-8.0.46-1.76.amzn1.src

Vulnerable software versions

Amazon Linux AMI: All versions

External links

http://alas.aws.amazon.com/ALAS-2017-903.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.