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AUSCERT External Security Bulletin Redistribution
ESB-2021.1969
Security Bulletin: WebSphere Application Server ND is vulnerable to
Directory Traversal vulnerability (CVE-2021-20517)
7 June 2021
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AusCERT Security Bulletin Summary
---------------------------------
Product: WebSphere Application Server
Publisher: IBM
Operating System: AIX
HP-UX
IBM i
Linux variants
Solaris
Windows
z/OS
Impact/Access: Delete Arbitrary Files -- Remote/Unauthenticated
Access Confidential Data -- Remote/Unauthenticated
Resolution: Patch/Upgrade
CVE Names: CVE-2021-20517
Original Bulletin:
https://www.ibm.com/support/pages/node/6456955
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WebSphere Application Server ND is vulnerable to Directory Traversal
vulnerability (CVE-2021-20517)
Document Information
Document number : 6456955
Modified date : 27 May 2021
Product : WebSphere Application Server
Software version : 8.5, 9.0
Operating system(s): AIX
HP-UX
IBM i
Linux
Solaris
Windows
z/OS
Edition : Advanced, Enterprise,Network Deployment
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
+-------------------------------+----------+
|Affected Product(s) |Version(s)|
+-------------------------------+----------+
|WebSphere Application Server ND|9.0 |
+-------------------------------+----------+
|WebSphere Application Server ND|8.5 |
+-------------------------------+----------+
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
Acknowledgement
This vulnerability was reported to IBM by Alessio Dalla Piazza.
Change History
27 May 2021: Initial Publication
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