Path Traversal in IBM App Connect Enterprise Certified Container

1) Absolute Path Traversal

EUVDB-ID: #VU58205

Risk: Medium

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

CVE-ID: CVE-2021-32804

CWE-ID: CWE-36 - Absolute Path Traversal

Exploit availability: No

Description

The vulnerability allows a remote attacker to overwrite arbitrary files on the system.

The vulnerability exists due to a logic issue when file paths contained repeated path roots such as ////home/user/.bashrc. node-tar would only strip a single path root from such paths. When given an absolute file path with repeating path roots, the resulting path (e.g. ///home/user/.bashrc) would still resolve to an absolute path, thus allowing arbitrary file creation and overwrite.

Mitigation

Install update from vendor's website.

Vulnerable software versions

App Connect Enterprise Certified Container: 1.0 - 2.0

CPE2.3

• cpe:2.3:a:ibm_corporation:app_connect_enterprise_certified_container:1.0:*:*:*:*:*:*:*
• cpe:2.3:a:ibm_corporation:app_connect_enterprise_certified_container:1.1:*:*:*:*:*:*:*
• cpe:2.3:a:ibm_corporation:app_connect_enterprise_certified_container:1.2:*:*:*:*:*:*:*

External links

https://www.ibm.com/blogs/psirt/security-bulletin-ibm-app-connect-enterprise-certified-container-may-be-vulnerable-to-directory-traversal-due-to-cve-2021-32804/
https://www.ibm.com/support/pages/node/6507035

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.