Security Bulletin: WebSphere Application Server ND is vulnerable to Directory Traversal vulnerability (CVE-2021-20517)

Summary

WebSphere Application Server ND is vulnerable to a directory traversal vulnerability. This has been addressed.

Vulnerability Details

CVEID:CVE-2021-20517
**DESCRIPTION:**IBM WebSphere Application Server Network Deployment could allow a remote authenticated attacker to traverse directories. An attacker could send a specially-crafted URL request containing “dot dot” sequences (/…/) to read and delete arbitrary files on the system.
CVSS Base score: 6.4
CVSS Temporal Score: See: https://exchange.xforce.ibmcloud.com/vulnerabilities/198435 for the current score.
CVSS Vector: (CVSS:3.0/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:H/A:L)

Affected Products and Versions

Remediation/Fixes

The recommended solution is to apply the interim fix, Fix Pack or PTF containing the APAR for each named product as soon as practical. For WebSphere Application Server ND traditional and WebSphere Application Server ND Hypervisor Edition:

For V9.0.0.0 through 9.0.5.7:
· Upgrade to minimal fix pack levels as required by interim fix and then apply Interim Fix PH35098
--OR–
· Apply Fix Pack 9.0.5.8 or later (targeted availability 2Q2021).

For V8.5.0.0 through 8.5.5.19:
· Upgrade to minimal fix pack levels as required by interim fix and then apply Interim Fix PH35098
--OR–
· Apply Fix Pack 8.5.5.20 or later (targeted availability 3Q2021).

Additional interim fixes may be available and linked off the interim fix download page.

Workarounds and Mitigations

None