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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2020.3182 Security Bulletin: Denial of service vulnerability in WebSphere Application Server Liberty (CVE-2020-4590) 17 September 2020 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: IBM WebSphere Application Server Liberty Publisher: IBM Operating System: Linux variants Windows Mac OS AIX HP-UX Solaris IBM i z/OS Impact/Access: Denial of Service -- Existing Account Resolution: Patch/Upgrade CVE Names: CVE-2020-4590 Original Bulletin: https://www.ibm.com/support/pages/node/6333623 - --------------------------BEGIN INCLUDED TEXT-------------------- Denial of service vulnerability in WebSphere Application Server Liberty (CVE-2020-4590) Security Bulletin Document Information Product: WebSphere Application Server Software version: Liberty Operating system(s): AIX, HP-UX, IBM i, Linux, Solaris, Windows, z/OS, Mac OS Document number: 6333623 Modified date: 16 September 2020 Summary WebSphere Application Server Liberty is vulnerable to a denial of service. This has been addressed. Vulnerability Details CVEID: CVE-2020-4590 DESCRIPTION: IBM WebSphere Application Server Liberty running oauth-2.0 or openidConnectServer-1.0 server features is vulnerable to a denial of service attack conducted by an authenticated client. CVSS Base score: 5.3 CVSS Temporal Score: See: https://exchange.xforce.ibmcloud.com/vulnerabilities/ 184650 for the current score. CVSS Vector: (CVSS:3.0/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H) Affected Products and Versions +------------------------------------+-------------------+ |Affected Product(s) |Version(s) | +------------------------------------+-------------------+ |WebSphere Application Server Liberty|17.0.0.3 - 20.0.0.9| +------------------------------------+-------------------+ Remediation/Fixes The recommended solution is to apply the interim fix or Fix Pack containing APAR PH29368 for each named product as soon as practical. For WebSphere Application Server Liberty 17.0.0.3 - 20.0.0.9 using the oauth-2.0 or openidConnectServer-1.0 features: . Upgrade to minimal fix pack levels as required by interim fix and then apply Interim Fix PH29368 - --OR-- . Apply Liberty Fix Pack 20.0.0.10 or later (targeted availability 4 Q2020 ). 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 - --------------------------END INCLUDED TEXT-------------------- You have received this e-mail bulletin as a result of your organisation's registration with AusCERT. The mailing list you are subscribed to is maintained within your organisation, so if you do not wish to continue receiving these bulletins you should contact your local IT manager. If you do not know who that is, please send an email to auscert@auscert.org.au and we will forward your request to the appropriate person. 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If you have any questions or need further information, please contact them directly. Previous advisories and external security bulletins can be retrieved from: https://www.auscert.org.au/bulletins/ =========================================================================== Australian Computer Emergency Response Team The University of Queensland Brisbane Qld 4072 Internet Email: auscert@auscert.org.au Facsimile: (07) 3365 7031 Telephone: (07) 3365 4417 (International: +61 7 3365 4417) AusCERT personnel answer during Queensland business hours which are GMT+10:00 (AEST). On call after hours for member emergencies only. =========================================================================== -----BEGIN PGP SIGNATURE----- Comment: http://www.auscert.org.au/render.html?it=1967 iQIVAwUBX2L1nONLKJtyKPYoAQiyahAAnXIx7l7spW140AuKIaXQItPpx/0hrbuP Je+E8rfyqopoK8LyEyCjqTUC905RZKGzCvvKxrPoKb4H4UWYp6Ghrz+1aektUdey zcOykns/nmNnsYSJwNGRfu9WGi0b8NrtML8uEwo6YbXb9Vg0iik9ctVxnvRZbpEs zna/sa9kLFvp2jrEetA+2NTflZ/x9QCaKh7stRCJcSlVOHP4sUh+agHv9Q5Nh1WE MvzAJQkpH1PQqFOnYBTU1RaFMvFneBaqGJKKpzSCZ3V7VKqkmr1f//48dVGKtaQ5 ZAuGi1q3kWOBQg7H858JrShIryBPU1nIYYiqk17CKlguAuoDauoRDNHKHH/HqfQ/ 9hCTq4f7MizIhvaQgZsjw8McRwEWy4gUnjPVBvZ6mvDAgkef2aZBU1RutJu21R8l 6w4/amgEUZ3F3rUjKpTRbYkNaXAL3Bq/cDbeYZdgPqcJ/vQgQbYz1l1eGGfOtrAT WcrF/OnEaR5zzZFXlIZYOd+fIm1FBfHPd+bIIxaoxAHNz8K03gUjuBKcYsv3qVgj ZUlx6REJlkDZ6kjlj2cSKzLzKDTwk6FY6p7wZLibHWHbgqf4E6KCoGqb2ttPYvkj JU+aAb9PUFmoBAdehCKAWwgNAm6U3XUFzMkJW7OaYrM6Kp2nFuWOXJyQ+KQh45st DN7J8OCkc+c= =jrE1 -----END PGP SIGNATURE-----