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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2021.0305 Security Bulletin: WebSphere Application Server is vulnerable to an XML External Entity (XXE) Injection Vulnerability (CVE-2020-4949) 27 January 2021 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: WebSphere Application Server Publisher: IBM Operating System: AIX HP-UX Linux variants Solaris Windows IBM i z/OS Impact/Access: Denial of Service -- Remote/Unauthenticated Access Confidential Data -- Remote/Unauthenticated Resolution: Patch/Upgrade CVE Names: CVE-2020-4949 Original Bulletin: https://www.ibm.com/support/pages/node/6408244 - --------------------------BEGIN INCLUDED TEXT-------------------- Security Bulletin: WebSphere Application Server is vulnerable to an XML External Entity (XXE) Injection Vulnerability (CVE-2020-4949) Document Information More support for: 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 Document number: 6408244 Modified date: 25 January 2021 Summary WebSphere Application Server is vulnerable to an XML External Entity (XXE) Injection vulnerability. This has been addressed. Vulnerability Details CVEID: CVE-2020-4949 DESCRIPTION: IBM WebSphere Application Server is vulnerable to an 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/ 192025 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 9.0.5.6: ? Upgrade to minimal fix pack levels as required by interim fix and then apply Interim Fix PH31727 - --OR-- ? Apply Fix Pack 9.0.5.7 or later (targeted availability 1Q2021). For V8.5.0.0 through 8.5.5.18: ? Upgrade to minimal fix pack levels as required by interim fix and then apply Interim Fix PH31727 ? Apply Fix Pack 8.5.5.19 or later (targeted availability 1Q2021). For V8.0.0.0 through 8.0.0.15: ? Upgrade to 8.0.0.15 and then apply Interim Fix PH31727 For V7.0.0.0 through 7.0.0.45: ? Upgrade to 7.0.0.45 and then apply Interim Fix PH31727 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 Subscribe to My Notifications to be notified of important product support 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 r00t4dm at Cloud-Penetrating Arrow Lab, Longofo at Knownsec 404 Team and 0rich1 of Ant Security FG Lab Change History 25 Jan 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 - --------------------------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. 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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 iQIVAwUBYBEF2ONLKJtyKPYoAQjCIA//XGNCvcOymZDr1vwyI6DPUHvCvTHPdpp7 WVdEkfnwqyFonctjwh3z9OHOOyCP1eqHHf5DAsngbpfuSuYIomrLRUhLznA3YkrE FpEB8t2R8YP+zTCcqWGnTM1YFaMED15FCfavSeP/O+W/FUENwzu9l9iKQEnEHLYF EPB5FWNkNkhHFbHxVTazFpdHfj3JaschqT4VWtJuIGiuU6ypKJsfKBFjIYxLKDrZ hdwffs5TgEwbKpPKUOux+r1S79eIWgchg/UCMBHZRRS0ejcekihKRLKhKqxYjTtG Iiq1ci0UR6HTimPAcPMJSGfJoovMC5G1Qu7IJLSGCfcQst0vkHXg07x670i6etcE RcsZUnHOfripmIsiiJLa+TiLeB71BbLjTD26zPwKRUXdd0NL8o9A1s64qGKqMW/q v2Ml60Oo2gibPtz2h7mbYUexvrvYfIjK1Fstjgt+GZ0rp1O2RH2PVKRfeU66cuUm 3j7oHWoC72Ua7XeBS0M3A0Hk/rAJv0f8IjVjzHsj7xdy4nUZVYvV3XYVLy2E/7b9 iq6lkYqcqao+oCfrh59MibI/+CU5Zsl3sAre6BRQrqL0Dl5GDF/8tfTLiRVw64K2 C1vGKEf0TTKneaJw6zhjDoojbLnYPymsFb9FWqHHjZh5FnwE7BvvTU9BMlAD1vZT FVnGZNw4uPs= =sBNt -----END PGP SIGNATURE-----