Amazon Linux AMI update for tomcat8

Published: 2019-07-26

Risk	Medium
Patch available	YES
Number of vulnerabilities	2
CVE-ID	CVE-2019-0221 CVE-2019-0199
CWE-ID	CWE-79 CWE-400
Exploitation vector	Network
Public exploit	Public exploit code for vulnerability #1 is available.
Vulnerable software	Amazon Linux AMI Operating systems & Components / Operating system
Vendor	Amazon Web Services

Security Bulletin

This security bulletin contains information about 2 vulnerabilities.

1) Cross-site scripting

EUVDB-ID: #VU18638

Risk: Low

CVSSv4.0: 2 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N/E:P/U:Clear]

CVE-ID: CVE-2019-0221

CWE-ID: CWE-79 - Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

Exploit availability: Yes

Description

The disclosed vulnerability allows a remote attacker to perform cross-site scripting (XSS) attacks.

The vulnerability exists due to insufficient sanitization of user-supplied data within SSI printenv command, when parsing URI. A remote attacker can trick the victim to follow a specially crafted link and execute arbitrary HTML and script code in user's browser in context of vulnerable website.

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.

Example:

http://[host]/printenv.shtml?%3Cscript%3Ealert(%27xss%27)%3C/script%3E

Mitigation

Update the affected packages:

noarch:
    tomcat8-servlet-3.1-api-8.5.42-1.80.amzn1.noarch
    tomcat8-lib-8.5.42-1.80.amzn1.noarch
    tomcat8-jsp-2.3-api-8.5.42-1.80.amzn1.noarch
    tomcat8-docs-webapp-8.5.42-1.80.amzn1.noarch
    tomcat8-el-3.0-api-8.5.42-1.80.amzn1.noarch
    tomcat8-javadoc-8.5.42-1.80.amzn1.noarch
    tomcat8-admin-webapps-8.5.42-1.80.amzn1.noarch
    tomcat8-8.5.42-1.80.amzn1.noarch
    tomcat8-webapps-8.5.42-1.80.amzn1.noarch
    tomcat8-log4j-8.5.42-1.80.amzn1.noarch

src:
    tomcat8-8.5.42-1.80.amzn1.src

Vulnerable software versions

Amazon Linux AMI: All versions

CPE2.3

cpe:2.3:o:amazon_web_services:amazon_linux_ami:*:*:*:*:*:*:*:*

External links

https://alas.aws.amazon.com/ALAS-2019-1234.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

CVSSv4.0: 6.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2019-0199

CWE-ID: CWE-400 - Resource exhaustion

Exploit availability: No