Amazon Linux AMI update for tomcat6

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:
    tomcat6-webapps-6.0.51-1.10.amzn1.noarch
    tomcat6-6.0.51-1.10.amzn1.noarch
    tomcat6-jsp-2.1-api-6.0.51-1.10.amzn1.noarch
    tomcat6-servlet-2.5-api-6.0.51-1.10.amzn1.noarch
    tomcat6-lib-6.0.51-1.10.amzn1.noarch
    tomcat6-el-2.1-api-6.0.51-1.10.amzn1.noarch
    tomcat6-docs-webapp-6.0.51-1.10.amzn1.noarch
    tomcat6-admin-webapps-6.0.51-1.10.amzn1.noarch
    tomcat6-javadoc-6.0.51-1.10.amzn1.noarch

src:
    tomcat6-6.0.51-1.10.amzn1.src

Vulnerable software versions

Amazon Linux AMI: All versions

External links

http://alas.aws.amazon.com/ALAS-2017-810.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.

2) Improper input validation

EUVDB-ID: #VU1184

Risk: Low

CVSSv3.1: 3.4 [CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N/E:P/RL:O/RC:C]

CVE-ID: CVE-2016-6816

CWE-ID: CWE-200 - Information exposure

Exploit availability: Yes

Description

The vulnerability allows a remote attacker to manipulate HTTP responses.

The vulnerability exists due to incorrect parsing of HTTP requests. A remote attacker can send a specially crafted HTTP request containing specially crafted characters and perform XSS attacks, manipulate HTTP responses or obtain potentially sensitive data, belonging to other sessions.

Successful exploitation of the vulnerability may allow an attacker to gain access to potentially sensitive information, but requires presence of a proxy server, which does not block injected characters.

Mitigation

Update the affected packages.

noarch:
    tomcat6-webapps-6.0.51-1.10.amzn1.noarch
    tomcat6-6.0.51-1.10.amzn1.noarch
    tomcat6-jsp-2.1-api-6.0.51-1.10.amzn1.noarch
    tomcat6-servlet-2.5-api-6.0.51-1.10.amzn1.noarch
    tomcat6-lib-6.0.51-1.10.amzn1.noarch
    tomcat6-el-2.1-api-6.0.51-1.10.amzn1.noarch
    tomcat6-docs-webapp-6.0.51-1.10.amzn1.noarch
    tomcat6-admin-webapps-6.0.51-1.10.amzn1.noarch
    tomcat6-javadoc-6.0.51-1.10.amzn1.noarch

src:
    tomcat6-6.0.51-1.10.amzn1.src

Vulnerable software versions

Amazon Linux AMI: All versions

External links

http://alas.aws.amazon.com/ALAS-2017-810.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. However, proof of concept for this vulnerability is available.