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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2020.2277 MFSA 2020-25 Security Vulnerabilities fixed in Firefox ESR 68.10 2 July 2020 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: Firefox ESR Publisher: Mozilla Operating System: windows UNIX variants (UNIX, Linux, OSX) Impact/Access: Denial of Service -- Unknown/Unspecified Access Confidential Data -- Unknown/Unspecified Resolution: Patch/Upgrade CVE Names: CVE-2020-12421 CVE-2020-12420 CVE-2020-12419 CVE-2020-12418 CVE-2020-12417 Original Bulletin: https://www.mozilla.org/en-US/security/advisories/mfsa2020-25/ - --------------------------BEGIN INCLUDED TEXT-------------------- Mozilla Foundation Security Advisory 2020-25 Security Vulnerabilities fixed in Firefox ESR 68.10 Announced June 30, 2020 Impact high Products Firefox ESR Fixed in Firefox ESR 68.10 # CVE-2020-12417: Memory corruption due to missing sign-extension for ValueTags on ARM64 Reporter Deian Stefan Impact high Description Due to confusion about ValueTags on JavaScript Objects, an object may pass through the type barrier, resulting in memory corruption and a potentially exploitable crash. Note: this issue only affects Firefox on ARM64 platforms. References o Bug 1640737 # CVE-2020-12418: Information disclosure due to manipulated URL object Reporter Marcin 'Icewall' Noga of Cisco Talos Impact high Description Manipulating individual parts of a URL object could have caused an out-of-bounds read, leaking process memory to malicious JavaScript. References o Bug 1641303 # CVE-2020-12419: Use-after-free in nsGlobalWindowInner Reporter worcester12345 Impact high Description When processing callbacks that occurred during window flushing in the parent process, the associated window may die; causing a use-after-free condition. This could have led to memory corruption and a potentially exploitable crash. References o Bug 1643874 # CVE-2020-12420: Use-After-Free when trying to connect to a STUN server Reporter Byron Campen Impact high Description When trying to connect to a STUN server, a race condition could have caused a use-after-free of a pointer, leading to memory corruption and a potentially exploitable crash. References o Bug 1643437 # CVE-2020-12421: Add-On updates did not respect the same certificate trust rules as software updates Reporter Chuck Harmston, Robert Hardy Impact moderate Description When performing add-on updates, certificate chains terminating in non-built-in-roots were rejected (even if they were legitimately added by an administrator.) This could have caused add-ons to become out-of-date silently without notification to the user. References o Bug 1308251 - --------------------------END INCLUDED TEXT-------------------- You have received this e-mail bulletin as a result of your organisation's registration with AusCERT. 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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). 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