Remote code execution in Apache Tomcat

1) Permissions, privileges, and access controls

EUVDB-ID: #VU101893

Risk: High

CVSSv3.1: 7.1 [CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2024-56337

CWE-ID: CWE-264 - Permissions, Privileges, and Access Controls

Exploit availability: No

Description

The vulnerability allows a remote attacker to compromise the affected system.

The vulnerability exists due to incomplete mitigation for #VU101814(CVE-2024-50379) on a case insensitive file system with the default servlet write enabled (readonly initialisation parameter set to the non-default value of false). A remote attacker can upload malicious files to the server and execute them compromising the system.

The mitigation bypass depends on the version of Java used on the system.

Mitigation

Update to the latest version of Apache Tomcat and follow the instructions below:

- running on Java 8 or Java 11: the system property sun.io.useCanonCaches must be explicitly set to false (it defaults to true)
- running on Java 17: the system property sun.io.useCanonCaches, if set, must be set to false (it defaults to false)
- running on Java 21 onwards: no further configuration is required (the system property and the problematic cache have been removed)

Vulnerable software versions

Apache Tomcat: 9.0.0-M1 - 11.0.1

CPE2.3

• cpe:2.3:a:apache_foundation:apache_tomcat:9.0.97:*:*:*:*:*:*:*
• cpe:2.3:a:apache_foundation:apache_tomcat:10.0.27:*:*:*:*:*:*:*
• cpe:2.3:a:apache_foundation:apache_tomcat:10.1.33:*:*:*:*:*:*:*
• cpe:2.3:a:apache_foundation:apache_tomcat:11.0.1:*:*:*:*:*:*:*

External links

http://lists.apache.org/thread/2bjnh3p78b89n5hw539hh31sr7tt7m22

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

How the attacker can exploit this vulnerability?

The attacker would have to send a specially crafted request to the affected application in order to exploit this vulnerability.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.