08 January 2020
Protect yourself against future threats.
-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2020.0055 MFSA 2020-02 Security Vulnerabilities fixed in Firefox ESR 68.4 8 January 2020 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: Firefox Extended Support Release Publisher: Mozilla Operating System: Windows UNIX variants (UNIX, Linux, OSX) Impact/Access: Execute Arbitrary Code/Commands -- Remote with User Interaction Cross-site Scripting -- Remote with User Interaction Denial of Service -- Remote with User Interaction Access Confidential Data -- Remote with User Interaction Reduced Security -- Remote with User Interaction Resolution: Patch/Upgrade CVE Names: CVE-2019-17024 CVE-2019-17022 CVE-2019-17021 CVE-2019-17017 CVE-2019-17016 CVE-2019-17015 Reference: ESB-2020.0054 Original Bulletin: https://www.mozilla.org/en-US/security/advisories/mfsa2020-02/ - --------------------------BEGIN INCLUDED TEXT-------------------- Mozilla Foundation Security Advisory 2020-02 Security Vulnerabilities fixed in Firefox ESR 68.4 Announced January 7, 2020 Impact high Products Firefox ESR Fixed in Firefox ESR 68.4 # CVE-2019-17015: Memory corruption in parent process during new content process initialization on Windows Reporter Thomas Imbert Impact high Description During the initialization of a new content process, a pointer offset can be manipulated leading to memory corruption and a potentially exploitable crash in the parent process. Note: this issue only occurs on Windows. Other operating systems are unaffected. References o Bug 1599005 # CVE-2019-17016: Bypass of @namespace CSS sanitization during pasting Reporter Michal Bentkowski Impact high Description When pasting a <style> tag from the clipboard into a rich text editor, the CSS sanitizer incorrectly rewrites a @namespace rule. This could allow for injection into certain types of websites resulting in data exfiltration. References o Bug 1599181 # CVE-2019-17017: Type Confusion in XPCVariant.cpp Reporter bo13oy Impact high Description Due to a missing case handling object types, a type confusion vulnerability could occur, resulting in a crash. We presume that with enough effort that it could be exploited to run arbitrary code. References o Bug 1603055 # CVE-2019-17021: Heap address disclosure in parent process during content process initialization on Windows Reporter Thomas Imbert Impact moderate Description During the initialization of a new content process, a race condition occurs that can allow a content process to disclose heap addresses from the parent process. Note: this issue only occurs on Windows. Other operating systems are unaffected. References o Bug 1599008 # CVE-2019-17022: CSS sanitization does not escape HTML tags Reporter Michal Bentkowski Impact moderate Description When pasting a <style> tag from the clipboard into a rich text editor, the CSS sanitizer does not escape < and > characters. Because the resulting string is pasted directly into the text node of the element this does not result in a direct injection into the webpage; however, if a webpage subsequently copies the node's innerHTML, assigning it to another innerHTML, this would result in an XSS vulnerability. Two WYSIWYG editors were identified with this behavior, more may exist. References o Bug 1602843 # CVE-2019-17024: Memory safety bugs fixed in Firefox 72 and Firefox ESR 68.4 Reporter Mozilla developers Impact high Description Mozilla developers Jason Kratzer, Christian Holler, and Bob Clary reported memory safety bugs present in Firefox 71 and Firefox ESR 68.3. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code. References o Memory safety bugs fixed in Firefox 72 and Firefox ESR 68.4 - --------------------------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. 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On call after hours for member emergencies only. =========================================================================== -----BEGIN PGP SIGNATURE----- Comment: http://www.auscert.org.au/render.html?it=1967 iQIVAwUBXhUYG2aOgq3Tt24GAQjR5RAAvV0n99mthsnnseIl6Ef0c8XxAlW4EnQr aFujXe+t10gokJYv9LBUE2KUhRFOG10ruIRYBIvYfNOxIHKh7xY4DVu7YD/PjxOx gkVMFm7XiLAw4jORtSxn64z+Uo8ni9fMYtW+9lPjWyqKvbBerBXDGjw3+u0zIkBc HmGItmNLT4xD7qR+G46lfnUZD/KuGdKsSdOw2o6iTdpqxEqxoP5mWe9V7s94hbZX WSDIJ1d9OwPHwkp0FUGH9n92K+dyXJZ9mZ6S0ZHEtR5S/5dwmibOfayCMViCYWpY rt1+tuVY0dC2mPcaxBdDfR4h0caBlbQZ691OtynIIErMOaIur8r/F5Fn2BXSwPpO 6R0zif0kKkEdszil3LV3gPQU7ee3fpBQPr/i75XBEyxhhlMPPTT7tM7PsccSGHDx a0dk3QHOeAp9xRZ61MyV5/LkNWjY+mWPY9EWqA4zKWJS8noyR5e2xlTUM3DK7d1W H/GOhFiH6SGXeIkrOxYE2DuoWn9JejzwIF8inhM3yTDSNv9sim1BIWCjq+UclAmN 4i/+4UGradd354SwsILs/UxYoe7uqfnUg2KZ3l6Brp2ZWicGDkKHmcw8XxaXeKM5 A2n0Dc7jmuOGtnLji/qm2KhiooWcIq/C/AhcgdInDvZkvzML6ubx/NRho1lgiGb2 6ReZ1YZpzBc= =WV46 -----END PGP SIGNATURE-----