Amazon Linux AMI update for tomcat7

Published: 2020-03-14 | Updated: 2023-02-22

Risk	High
Patch available	YES
Number of vulnerabilities	3
CVE-ID	CVE-2019-17569 CVE-2020-1935 CVE-2020-1938
CWE-ID	CWE-444 CWE-22
Exploitation vector	Network
Public exploit	Vulnerability #3 is being exploited in the wild.
Vulnerable software Subscribe	Amazon Linux AMI Operating systems & Components / Operating system
Vendor	Amazon Web Services

Security Bulletin

This security bulletin contains information about 3 vulnerabilities.

1) Inconsistent interpretation of HTTP requests

EUVDB-ID: #VU25806

Risk: Medium

CVSSv3.1: 5.7 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2019-17569

CWE-ID: CWE-444 - Inconsistent Interpretation of HTTP Requests ('HTTP Request Smuggling')

Exploit availability: No

Description

The vulnerability allows a remote attacker to perform HTTP request smuggling attack.

The vulnerability exists due to improper input validation when processing a Transfer-Encoding headers. A remote attacker can send a specially crafted HTTP request and perform HTTP request smuggling attack.

Mitigation

Update the affected packages:

noarch:
    tomcat7-jsp-2.2-api-7.0.100-1.36.amzn1.noarch
    tomcat7-admin-webapps-7.0.100-1.36.amzn1.noarch
    tomcat7-javadoc-7.0.100-1.36.amzn1.noarch
    tomcat7-webapps-7.0.100-1.36.amzn1.noarch
    tomcat7-log4j-7.0.100-1.36.amzn1.noarch
    tomcat7-docs-webapp-7.0.100-1.36.amzn1.noarch
    tomcat7-servlet-3.0-api-7.0.100-1.36.amzn1.noarch
    tomcat7-lib-7.0.100-1.36.amzn1.noarch
    tomcat7-el-2.2-api-7.0.100-1.36.amzn1.noarch
    tomcat7-7.0.100-1.36.amzn1.noarch

src:
    tomcat7-7.0.100-1.36.amzn1.src

Vulnerable software versions

Amazon Linux AMI: All versions

External links

http://alas.aws.amazon.com/ALAS-2020-1352.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) Inconsistent interpretation of HTTP requests

EUVDB-ID: #VU25807

Risk: Medium

CVSSv3.1: 5.7 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2020-1935

CWE-ID: CWE-444 - Inconsistent Interpretation of HTTP Requests ('HTTP Request Smuggling')

Exploit availability: No

Description

The vulnerability allows a remote attacker to perform HTTP request smuggling attack.

The vulnerability exists due to the HTTP header parsing code uses an approach to end-of-line parsing that allows some invalid HTTP headers to be parsed as valid. A remote attacker can send a specially crafted HTTP request and perform HTTP request smuggling attack.

Mitigation

Update the affected packages:

noarch:
    tomcat7-jsp-2.2-api-7.0.100-1.36.amzn1.noarch
    tomcat7-admin-webapps-7.0.100-1.36.amzn1.noarch
    tomcat7-javadoc-7.0.100-1.36.amzn1.noarch
    tomcat7-webapps-7.0.100-1.36.amzn1.noarch
    tomcat7-log4j-7.0.100-1.36.amzn1.noarch
    tomcat7-docs-webapp-7.0.100-1.36.amzn1.noarch
    tomcat7-servlet-3.0-api-7.0.100-1.36.amzn1.noarch
    tomcat7-lib-7.0.100-1.36.amzn1.noarch
    tomcat7-el-2.2-api-7.0.100-1.36.amzn1.noarch
    tomcat7-7.0.100-1.36.amzn1.noarch

src:
    tomcat7-7.0.100-1.36.amzn1.src

Vulnerable software versions

Amazon Linux AMI: All versions

External links

http://alas.aws.amazon.com/ALAS-2020-1352.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) Path traversal

EUVDB-ID: #VU25502

Risk: High

CVSSv3.1: 9.4 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:H/RL:O/RC:C]

CVE-ID: CVE-2020-1938

CWE-ID: CWE-22 - Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')

Exploit availability: Yes

Description

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

The vulnerability exists due to improper input validation in Apache Tomcat AJP connector. A remote attacker can send a specially crafted AJP request, include and execute arbitrary files on the target system.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.

Mitigation

Update the affected packages:

noarch:
    tomcat7-jsp-2.2-api-7.0.100-1.36.amzn1.noarch
    tomcat7-admin-webapps-7.0.100-1.36.amzn1.noarch
    tomcat7-javadoc-7.0.100-1.36.amzn1.noarch
    tomcat7-webapps-7.0.100-1.36.amzn1.noarch
    tomcat7-log4j-7.0.100-1.36.amzn1.noarch
    tomcat7-docs-webapp-7.0.100-1.36.amzn1.noarch
    tomcat7-servlet-3.0-api-7.0.100-1.36.amzn1.noarch
    tomcat7-lib-7.0.100-1.36.amzn1.noarch
    tomcat7-el-2.2-api-7.0.100-1.36.amzn1.noarch
    tomcat7-7.0.100-1.36.amzn1.noarch

src:
    tomcat7-7.0.100-1.36.amzn1.src

Vulnerable software versions

Amazon Linux AMI: All versions

External links

http://alas.aws.amazon.com/ALAS-2020-1352.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?

Yes. This vulnerability is being exploited in the wild.