Amazon Linux AMI update for tomcat7, tomcat8

Published: 2017-02-14

Risk	Low
Patch available	YES
Number of vulnerabilities	1
CVE-ID	CVE-2016-8745
CWE-ID	CWE-399
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) Information disclosure

EUVDB-ID: #VU5449

Risk: Low

CVSSv3.1: 4.6 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2016-8745

CWE-ID: CWE-399 - Resource Management Errors

Exploit availability: No

Description

The vulnerability allows a remote attacker to gain access to potentially sensitive information.

The vulnerability exists to error within the send file code for the NIO HTTP connector, which causes current Processor object being added to the Processor cache multiple times. This behavior means that sharing the same Processor for concurrent requests can lead to leakage of potentially sensitive information between requests, such as session ID, request body, etc.

Successful exploitation of the vulnerability may allow an attacker to obtain potentially sensitive information.

Mitigation

Update the affected packages.

noarch:
    tomcat8-jsp-2.3-api-8.0.41-1.69.amzn1.noarch
    tomcat8-javadoc-8.0.41-1.69.amzn1.noarch
    tomcat8-webapps-8.0.41-1.69.amzn1.noarch
    tomcat8-lib-8.0.41-1.69.amzn1.noarch
    tomcat8-log4j-8.0.41-1.69.amzn1.noarch
    tomcat8-servlet-3.1-api-8.0.41-1.69.amzn1.noarch
    tomcat8-el-3.0-api-8.0.41-1.69.amzn1.noarch
    tomcat8-admin-webapps-8.0.41-1.69.amzn1.noarch
    tomcat8-8.0.41-1.69.amzn1.noarch
    tomcat8-docs-webapp-8.0.41-1.69.amzn1.noarch
    tomcat7-lib-7.0.75-1.25.amzn1.noarch
    tomcat7-log4j-7.0.75-1.25.amzn1.noarch
    tomcat7-webapps-7.0.75-1.25.amzn1.noarch
    tomcat7-javadoc-7.0.75-1.25.amzn1.noarch
    tomcat7-el-2.2-api-7.0.75-1.25.amzn1.noarch
    tomcat7-7.0.75-1.25.amzn1.noarch
    tomcat7-admin-webapps-7.0.75-1.25.amzn1.noarch
    tomcat7-docs-webapp-7.0.75-1.25.amzn1.noarch
    tomcat7-jsp-2.2-api-7.0.75-1.25.amzn1.noarch
    tomcat7-servlet-3.0-api-7.0.75-1.25.amzn1.noarch

src:
    tomcat8-8.0.41-1.69.amzn1.src
    tomcat7-7.0.75-1.25.amzn1.src

Vulnerable software versions

Amazon Linux AMI: All versions

External links

http://alas.aws.amazon.com/ALAS-2017-796.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.