Path traversal in IBM WebSphere Application Server

1) Path traversal

EUVDB-ID: #VU99600

Risk: Medium

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

CVE-ID: CVE-2021-20354

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

Exploit availability: No

Description

The vulnerability allows a remote attacker to perform directory traversal attacks.

The vulnerability exists due to input validation error when processing directory traversal sequences. A remote attacker can send a specially-crafted URL request containing "dot dot" sequences (/../) to view arbitrary files on the system.

Mitigation

Install update from vendor's website.

Vulnerable software versions

IBM WebSphere Application Server: 8.0 - 9.0

CPE2.3

• cpe:2.3:a:ibm_corporation:ibm_websphere_application_server:8.0:*:*:*:*:*:*:*
• cpe:2.3:a:ibm_corporation:ibm_websphere_application_server:8.5:*:*:*:*:*:*:*
• cpe:2.3:a:ibm_corporation:ibm_websphere_application_server:9.0:*:*:*:*:*:*:*

External links

https://exchange.xforce.ibmcloud.com/vulnerabilities/194883
https://www.ibm.com/support/pages/node/6415959

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.