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AUSCERT External Security Bulletin Redistribution
ESB-2021.0607
Security Bulletin: WebSphere Application Server is vulnerable to a
directory traversal vulnerability (CVE-2021-20354)
18 February 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: Access Confidential Data -- Remote/Unauthenticated
Resolution: Patch/Upgrade
CVE Names: CVE-2021-20354
Original Bulletin:
https://www.ibm.com/support/pages/node/6415959
- --------------------------BEGIN INCLUDED TEXT--------------------
Security Bulletin: WebSphere Application Server is vulnerable to a directory
traversal vulnerability (CVE-2021-20354)
Security Bulletin
Summary
WebSphere Application Server is vulnerable to a directory traversal
vulnerability. This has been addressed.
Vulnerability Details
CVEID: CVE-2021-20354
DESCRIPTION: IBM WebSphere Application Server could allow a remote attacker
to traverse directories. An attacker could send a specially-crafted URL request
containing "dot dot" sequences (/../) to view arbitrary files on the system.
CVSS Base score: 5.9
CVSS Temporal Score: See: https://exchange.xforce.ibmcloud.com/vulnerabilities/
194883 for the current score.
CVSS Vector: (CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N)
Affected Products and Versions
+----------------------------+----------+
|Affected Product(s) |Version(s)|
+----------------------------+----------+
|WebSphere Application Server|9.0 |
+----------------------------+----------+
|WebSphere Application Server|8.5 |
+----------------------------+----------+
|WebSphere Application Server|8.0 |
+----------------------------+----------+
Remediation/Fixes
For WebSphere Application Server traditional and WebSphere Application Server
Hypervisor Edition:
For V9.0.0.0 through 9.0.5.6:
. Upgrade to minimal fix pack levels as required by interim fix and then apply
Interim Fix PH33648
- --OR--
. Apply Fix Pack 9.0.5.7 or later (targeted availability 1Q2021).
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 PH33648
- --OR--
. Apply Fix Pack 8.5.5.20 or later (targeted availability 3Q2021).
For V8.0.0.0 through 8.0.0.15:
. Upgrade to 8.0.0.15 and then apply Interim Fix PH33648
Additional interim fixes may be available and linked off the interim fix
download page.
WebSphere Application Server V7.0 and V8.0 are no longer in full support; IBM
recommends upgrading to a fixed, supported version/release/platform of the
product.
Workarounds and Mitigations
None
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alerts like this.
References
Complete CVSS v3 Guide
On-line Calculator v3
Off
Related Information
IBM Secure Engineering Web Portal
IBM Product Security Incident Response Blog
Acknowledgement
The vulnerability was reported to IBM by
Change History
17 Feb 2021: Initial Publication
*The CVSS Environment Score is customer environment specific and will
ultimately impact the Overall CVSS Score. Customers can evaluate the impact of
this vulnerability in their environments by accessing the links in the
Reference section of this Security Bulletin.
Disclaimer
According to the Forum of Incident Response and Security Teams (FIRST), the
Common Vulnerability Scoring System (CVSS) is an "industry open standard
designed to convey vulnerability severity and help to determine urgency and
priority of response." IBM PROVIDES THE CVSS SCORES ""AS IS"" WITHOUT WARRANTY
OF ANY KIND, INCLUDING THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
FOR A PARTICULAR PURPOSE. CUSTOMERS ARE RESPONSIBLE FOR ASSESSING THE IMPACT OF
ANY ACTUAL OR POTENTIAL SECURITY VULNERABILITY.
Document Location
Worldwide
Document Information
More support for:
WebSphere Application Server
Software version:
8.0, 8.5, 9.0
Operating system(s):
AIX, HP-UX, IBM i, Linux, Solaris, Windows, z/OS
Document number:
6415959
Modified date:
17 February 2021
UID
ibm16415959
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