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AUSCERT External Security Bulletin Redistribution
ESB-2020.2800
WebSphere Application Server is vulnerable to a remote code
execution vulnerability (CVE-2020-4589)
13 August 2020
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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: Execute Arbitrary Code/Commands -- Remote/Unauthenticated
Resolution: Patch/Upgrade
CVE Names: CVE-2020-4589
Original Bulletin:
https://www.ibm.com/support/pages/node/6258333
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Security Bulletin: WebSphere Application Server is vulnerable to a remote code
execution vulnerability (CVE-2020-4589)
Security Bulletin
Summary
WebSphere Application Server is vulnerable to a remote code execution
vulnerability. This has been addressed.
Vulnerability Details
CVEID: CVE-2020-4589
DESCRIPTION: IBM WebSphere Application Server could allow a remote
attacker to execute arbitrary code on the system with a specially-crafted
sequence of serialized objects from untrusted sources. The vulnerability
only occurs if an undocumented customization has been applied by an
administrator.
CVSS Base score: 8.1
CVSS Temporal Score: See:
https://exchange.xforce.ibmcloud.com/vulnerabilities/184585 for the
current score.
CVSS Vector: (CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H)
Affected Products and Versions
+-------------------------------------------+
| Affected Product(s) | Version(s) |
|------------------------------+------------|
| WebSphere Application Server | 9.0 |
|------------------------------+------------|
| WebSphere Application Server | 8.5 |
|------------------------------+------------|
| WebSphere Application Server | 8.0 |
|------------------------------+------------|
| WebSphere Application Server | 7.0 |
+-------------------------------------------+
Remediation/Fixes
For WebSphere Application Server traditional and WebSphere Application
Server Hypervisor Edition:
For V9.0.0.0 through 9.0.5.4:
. Upgrade to minimal fix pack levels as required by interim fix and then
apply Interim Fix PH27414
--OR--
. Apply Fix Pack 9.0.5.5 or later (targeted availability 3Q2020).
For V8.5.0.0 through 8.5.5.17:
. Upgrade to minimal fix pack levels as required by interim fix and then
apply Interim Fix PH27414
--OR--
. Apply Fix Pack 8.5.5.18 or later (targeted availability 3Q2020).
For V8.0.0.0 through 8.0.0.15:
. Upgrade to 8.0.0.15 and then apply Interim Fix PH27414
For V7.0.0.0 through 7.0.0.45:
. Upgrade to 7.0.0.45 and then apply Interim Fix PH27414
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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References
Complete CVSS v3 Guide
On-line Calculator v3
Off
Related Information
IBM Secure Engineering Web Portal
IBM Product Security Incident Response Blog
Acknowledgement
This vulnerability was reported to IBM by Kylinking.
Change History
12 Aug 2020: 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.
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