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AUSCERT External Security Bulletin Redistribution
ESB-2020.1794
Potential spoofing attack in Webshere Application Server
21 May 2020
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AusCERT Security Bulletin Summary
---------------------------------
Product: IBM WebSphere Application Server Liberty
Publisher: IBM
Operating System: UNIX variants (UNIX, Linux, OSX)
Windows
Impact/Access: Provide Misleading Information -- Existing Account
Access Confidential Data -- Existing Account
Resolution: Patch/Upgrade
CVE Names: CVE-2020-4421
Reference: ESB-2020.1650
ESB-2020.1601
Original Bulletin:
https://www.ibm.com/support/pages/node/6205926
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Potential spoofing attack in Webshere Application Server
(CVE-2020-4421)
Security Bulletin
Summary
IBM WebSphere Application Server Liberty using openidConnectServer feature
could allow spoofing identity by an authenticated user. This has been
addressed.
Vulnerability Details
CVEID: CVE-2020-4421
DESCRIPTION: IBM WebSphere Application Liberty could allow an authenticated
user using openidconnect to spoof another users identify.
CVSS Base score: 5
CVSS Temporal Score: See: https://exchange.xforce.ibmcloud.com/vulnerabilities/
180084 for the current score.
CVSS Vector: (CVSS:3.0/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:L)
Affected Products and Versions
+------------------------------------+-----------------+
|Affected Product(s) |Version(s) |
+------------------------------------+-----------------+
|WebSphere Application Server Liberty|19.0.0.5-20.0.0.4|
+------------------------------------+-----------------+
Remediation/Fixes
The recommended solution is to apply the interim fix or FixPack containing APAR
PH24154 for each named product as soon as practical.
For WebSphere Application Server Liberty 19.0.0.5-20.0.0.4 using the
openidConnectServer-1.0 feature:
. Upgrade to minimal fix pack levels as required by interim fix and then apply
Interim Fix PH24154
- --OR--
. Apply Liberty Fix Pack 20.0.0.5 or later.
Additional interim fixes may be available and linked off the interim fix
download page.
Workarounds and Mitigations
None
Get Notified about Future Security Bulletins
References
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