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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2021.1359 Security Bulletin: WebSphere Application Server is vulnerable to an XML External Entity (XXE) Injection vulnerability (CVE-2021-20454) 21 April 2021 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: WebSphere Application Server Publisher: IBM Operating System: IBM i Linux variants AIX HP-UX Solaris Windows z/OS Impact/Access: Denial of Service -- Remote/Unauthenticated Access Confidential Data -- Remote/Unauthenticated Resolution: Patch/Upgrade CVE Names: CVE-2021-20454 Original Bulletin: https://www.ibm.com/support/pages/node/6445481 Comment: This advisory references vulnerabilities in products which run on platforms other than IBMi. It is recommended that administrators running WebSphere Application Server check for an updated version of the software for their operating system. - --------------------------BEGIN INCLUDED TEXT-------------------- WebSphere Application Server is vulnerable to an XML External Entity (XXE) Injection vulnerability (CVE-2021-20454) Document Information Document number : 6445481 Modified date : 20 April 2021 Product : WebSphere Application Server Software version : 7.0, 8.0, 8.5, 9.0 Operating system(s): AIX HP-UX IBM i Linux Solaris Windows z/OS Edition : Advanced,Base,Developer,Enterprise,Express,Network Deployment,Single Server Summary WebSphere Application Server is vulnerable to an XML External Entity (XXE) Injection vulnerability. This has been addressed. Vulnerability Details CVEID: CVE-2021-20454 DESCRIPTION: IBM WebSphere Application Server is vulnerable to a XML External Entity Injection (XXE) attack when processing XML data. A remote attacker could exploit this vulnerability to expose sensitive information or consume memory resources. CVSS Base score: 8.2 CVSS Temporal Score: See: https://exchange.xforce.ibmcloud.com/vulnerabilities/ 196649 for the current score. CVSS Vector: (CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:L) 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 9.0.5.7: . Upgrade to minimal fix pack levels as required by interim fix and then apply Interim Fix PH34048 - --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 PH34048 - --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 PH34048 For V7.0.0.0 through 7.0.0.45: . Upgrade to 7.0.0.45 and then apply Interim Fix PH34048 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 Get Notified about Future Security Bulletins References Complete CVSS v3 Guide On-line Calculator v3 Off Acknowledgement This vulnerability was reported to IBM by r00t4dm at Cloud-Penetrating Arrow Lab, Longofo of Knownsec 404 Team Change History 20 Apr 2021: Initial Publication Document Location Worldwide - --------------------------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. NOTE: Third Party Rights This security bulletin is provided as a service to AusCERT's members. As AusCERT did not write the document quoted above, AusCERT has had no control over its content. The decision to follow or act on information or advice contained in this security bulletin is the responsibility of each user or organisation, and should be considered in accordance with your organisation's site policies and procedures. AusCERT takes no responsibility for consequences which may arise from following or acting on information or advice contained in this security bulletin. NOTE: This is only the original release of the security bulletin. It may not be updated when updates to the original are made. If downloading at a later date, it is recommended that the bulletin is retrieved directly from the author's website to ensure that the information is still current. Contact information for the authors of the original document is included in the Security Bulletin above. 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 iQIVAwUBYH+a/+NLKJtyKPYoAQg3zw/8D7mpPAi6P9JsryrKzGl2y7HdkosZ1mpC c6AFQD1Pv35c/Qblg9OeGluIVwJ37AOcXPSZ4auoJrpwToSJHjEMGsQ/TgCbR1zw iGt9xJ1lZVIX3VNQwaWof+TW1t515Sbj9wGU8vzsF76X5Tf1A9ODI+Cm6iY6aQ+A 7t2Ql4MYjf7ZYuRFYdK0KobPVuJiAiHBCogOADE7OtPQORdXCRRz8QL6v+1/+xct kMosReV9pZubj7y20JzeXvj7lc36zuQVAJ9fsM7OhbTUObCjQ1MhfCu/V8WulYzE QFaxqBy2ANw3lF7cnGNqtG89n3NPeO/EqhSV4CKp/2P1iV/rW9ZUpR0jcuys3eE2 WrOOKZ6RlPwJrJ0MauRHrinvTD3w+3AfZMu89U7ETVA6H/UgYctRl4Ae9/q91CUX /rX0YNh3OBgQfui+plFbNu3xmkdlcnp/orOCo4F1n6e5BcI/btEzLuFN/YcuD0bT dSUXQq+iVrCb2t/caIcgz/I/kmxRHoTs9zN1IzPZDJLbWf50riSB3crkwXunXd7o 3ymWujMaCh4cNKGlzUfEM5g2CLa2qYClEVxlepD0JvmKCvRf3RyMYPTp6Oloy9rz fhynf/ZDSOgC9dMnRMB833EaMElcQl4emZhhMe+uE5pyOwX1aDEt45mQJGEW2Pts 5Tf2Ga7y86Q= =0L5s -----END PGP SIGNATURE-----