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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2022.4841 Security Bulletin: IBM WebSphere Application Server Liberty is vulnerable to a Denial of Service due to Neko HTML (CVE-2022-24839) 29 September 2022 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: WebSphere Application Server Publisher: IBM Operating System: AIX IBM i Linux variants Windows macOS z/OS Resolution: Patch/Upgrade CVE Names: CVE-2022-24839 Original Bulletin: https://www.ibm.com/support/pages/node/6824871 Comment: CVSS (Max): 7.5 CVE-2022-24839 (CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H) CVSS Source: IBM Calculator: https://www.first.org/cvss/calculator/3.0#CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - --------------------------BEGIN INCLUDED TEXT-------------------- IBM WebSphere Application Server Liberty is vulnerable to a Denial of Service due to Neko HTML (CVE-2022-24839) Document Information Document number : 6824871 Modified date : 28 September 2022 Product : WebSphere Application Server Component : Liberty Software version : Liberty Operating system(s): AIX IBM i Linux Windows z/OS Mac OS Edition : Liberty Summary There is a vulnerability in the Neko HTML library used by IBM WebSphere Application Server Liberty with the openid-2.0 feature enabled. This has been addressed. Vulnerability Details CVEID: CVE-2022-24839 DESCRIPTION: Sparkle Motion Nokogiri is vulnerable to a denial of service, caused by a java.lang.OutOfMemoryError exception when parsing ill-formed HTML markup in the fork of org.cyberneko.html. By sending a specially-crafted request, a remote attacker could exploit this vulnerability to cause a denial of service condition. CVSS Base score: 7.5 CVSS Temporal Score: See: https://exchange.xforce.ibmcloud.com/vulnerabilities/ 224089 for the current score. CVSS Vector: (CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H) Affected Products and Versions +----------------------------------------+--------------------+ |Affected Product(s) |Version(s) | +----------------------------------------+--------------------+ |IBM WebSphere Application Server Liberty|17.0.0.3 - 22.0.0.10| +----------------------------------------+--------------------+ Remediation/Fixes IBM strongly recommends addressing the vulnerability now by applying a currently available interim fix or fix pack that contains the APAR PH48810 . To determine if a feature is enabled for IBM WebSphere Application Server Liberty, refer to How to determine if Liberty is using a specific feature . For IBM WebSphere Application Server Liberty 17.0.0.3 - 22.0.0.10 using the openid-2.0 feature(s): . Upgrade to minimal fix pack levels as required by interim fix and then apply Interim Fix PH48810 - --OR-- . Apply Liberty Fix Pack 22.0.0.11 or later (targeted availability 4Q2022). Additional interim fixes may be available and linked off the interim fix download page. Workarounds and Mitigations None To determine if a feature is enabled for IBM WebSphere Application Server Liberty, refer to How to determine if Liberty is using a specific feature . Change History 28 Sep 2022: Initial Publication - --------------------------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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On call after hours for member emergencies only. =========================================================================== -----BEGIN PGP SIGNATURE----- Comment: https://auscert.org.au/gpg-key/ iQIVAwUBYzUj4skNZI30y1K9AQjlBA/+LFHC4KEULEYBQ2lzA3iBFEW28Z7Jp9rK E4t21EbJfbVOieWRtxKhuO0omknVPbS+DO30NjYBDny/+tE7fhvJM/RT9WP1/ltz aOapPPn0wabXivd6Afa+rzMNLStE3BiMksduG5bUxqvGxTWXXvQRTwKbfAmRRZTx 7RnZFuq9KRdrZ8bpaXp0+EyK47e02JoJZkMAnDYZ233WI+bkOepLdVkLmaVuMQgX N93Ob3Wl0tSgHyho9Dpb8iAB3y+4Qe9ivrsXkEm2xjYMyAAEFkyC/IpWrWgBV+ue iSC4HVfHSp2SsFtXjTdbQpk8xP5wvMe7sbYvK420GJYwtM8rtvWHytihdWFr8jdO b9zUmnDFc0QUfQiL/vIwfFbCerktrpZqwjzm5cZI6QNfEoFxDssH/5jSJThElROJ TP4ZlKkOxMgzighYM38wosJPi6SHyjSqLGMwCxO+N8uOI4ezXs2joBjRcNFRIF6r jr2zrXJEC8wYLeY8BvIIUDz+0gH+9b+fqEDQykow0yRQUhV6nkH8Kr7JkA6fMmFJ nZciWo56CTtDortszEJiEt/0VsGbn6QPjbSe7wZ4xqGZgbExyCcHKa9pjRD2YG/Y Y2lL6oiL7pPPoyyVeZyJ/uHCKViX9Auyse+XpiXLm8EFN7rTdBlyveCLRadqGQE3 AHsSpTDgQk4= =9wQC -----END PGP SIGNATURE-----