Amazon Linux AMI update for tomcat8

1) Open redirect

EUVDB-ID: #VU15156

Risk: Low

CVSSv3.1: 2.8 [CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:L/A:N/E:P/RL:O/RC:C]

CVE-ID: CVE-2018-11784

CWE-ID: CWE-601 - URL Redirection to Untrusted Site ('Open Redirect')

Exploit availability: Yes

Description

The vulnerability allows a remote attacker to redirect victims to arbitrary URI.

The vulnerability exists due to improper sanitization of user-supplied data. A remote attacker can create a link that leads to a trusted website, however, when clicked, redirects the victim to arbitrary URI.

Successful exploitation of this vulnerability may allow a remote attacker to perform a phishing attack and steal potentially sensitive information.

Mitigation

Update the affected packages.

noarch:
    tomcat8-8.5.40-1.79.amzn1.noarch
    tomcat8-docs-webapp-8.5.40-1.79.amzn1.noarch
    tomcat8-el-3.0-api-8.5.40-1.79.amzn1.noarch
    tomcat8-admin-webapps-8.5.40-1.79.amzn1.noarch
    tomcat8-jsp-2.3-api-8.5.40-1.79.amzn1.noarch
    tomcat8-log4j-8.5.40-1.79.amzn1.noarch
    tomcat8-servlet-3.1-api-8.5.40-1.79.amzn1.noarch
    tomcat8-webapps-8.5.40-1.79.amzn1.noarch
    tomcat8-lib-8.5.40-1.79.amzn1.noarch
    tomcat8-javadoc-8.5.40-1.79.amzn1.noarch

src:
    tomcat8-8.5.40-1.79.amzn1.src

Vulnerable software versions

Amazon Linux AMI: All versions

External links

http://alas.aws.amazon.com/ALAS-2019-1208.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.

2) Resource exhaustion

EUVDB-ID: #VU18067

Risk: Medium

CVSSv3.1: 6.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2019-0199

CWE-ID: CWE-400 - Resource exhaustion

Exploit availability: No

Description

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists within the HTTP/2 implementation in Apache Tomcat that accepts streams with excessive numbers of SETTINGS frames and also permits clients to keep streams open without reading/writing request/response data. A remote attacker can exhaust all available threads on the server and perform denial of service attack.

Mitigation

Update the affected packages.

noarch:
    tomcat8-8.5.40-1.79.amzn1.noarch
    tomcat8-docs-webapp-8.5.40-1.79.amzn1.noarch
    tomcat8-el-3.0-api-8.5.40-1.79.amzn1.noarch
    tomcat8-admin-webapps-8.5.40-1.79.amzn1.noarch
    tomcat8-jsp-2.3-api-8.5.40-1.79.amzn1.noarch
    tomcat8-log4j-8.5.40-1.79.amzn1.noarch
    tomcat8-servlet-3.1-api-8.5.40-1.79.amzn1.noarch
    tomcat8-webapps-8.5.40-1.79.amzn1.noarch
    tomcat8-lib-8.5.40-1.79.amzn1.noarch
    tomcat8-javadoc-8.5.40-1.79.amzn1.noarch

src:
    tomcat8-8.5.40-1.79.amzn1.src

Vulnerable software versions

Amazon Linux AMI: All versions

External links

http://alas.aws.amazon.com/ALAS-2019-1208.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.

3) OS Command Injection

EUVDB-ID: #VU18236

Risk: High

CVSSv3.1: 7 [CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:F/RL:O/RC:C]

CVE-ID: CVE-2019-0232

CWE-ID: CWE-78 - Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')

Exploit availability: Yes

Description

The vulnerability allows a remote attacker to execute arbitrary commands on the target system.

The vulnerability exists due to an input validation error within the CGI Servlet when passing arguments from JRE to the Windows environment. A remote attacker can send a specially crafted request to the CGI Servlet, inject and execute arbitrary OS commands on the system with Apache Tomcat privileges.

Successful exploitation of the vulnerability requires that Apache Tomcat is installed on Windows operating system with enabled option “enableCmdLineArguments” (CGI Servlet and “enableCmdLineArguments” option are disabled by default).

Mitigation

Update the affected packages.

noarch:
    tomcat8-8.5.40-1.79.amzn1.noarch
    tomcat8-docs-webapp-8.5.40-1.79.amzn1.noarch
    tomcat8-el-3.0-api-8.5.40-1.79.amzn1.noarch
    tomcat8-admin-webapps-8.5.40-1.79.amzn1.noarch
    tomcat8-jsp-2.3-api-8.5.40-1.79.amzn1.noarch
    tomcat8-log4j-8.5.40-1.79.amzn1.noarch
    tomcat8-servlet-3.1-api-8.5.40-1.79.amzn1.noarch
    tomcat8-webapps-8.5.40-1.79.amzn1.noarch
    tomcat8-lib-8.5.40-1.79.amzn1.noarch
    tomcat8-javadoc-8.5.40-1.79.amzn1.noarch

src:
    tomcat8-8.5.40-1.79.amzn1.src

Vulnerable software versions

Amazon Linux AMI: All versions

External links

http://alas.aws.amazon.com/ALAS-2019-1208.html

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the local network (LAN).

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability. However, a fully functional exploit for this vulnerability is available.