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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2021.0676 Security Vulnerabilities fixed in Thunderbird 78.8 24 February 2021 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: Mozilla Thunderbird Publisher: Mozilla Operating System: UNIX variants (UNIX, Linux, OSX) Windows Impact/Access: Execute Arbitrary Code/Commands -- Remote with User Interaction Access Confidential Data -- Remote with User Interaction Reduced Security -- Remote with User Interaction Resolution: Patch/Upgrade CVE Names: CVE-2021-23978 CVE-2021-23973 CVE-2021-23969 CVE-2021-23968 Reference: ESB-2021.0675 Original Bulletin: https://www.mozilla.org/en-US/security/advisories/mfsa2021-09/ - --------------------------BEGIN INCLUDED TEXT-------------------- Mozilla Foundation Security Advisory 2021-09 Security Vulnerabilities fixed in Thunderbird 78.8 Announced: February 23, 2021 Impact: high Products: Thunderbird Fixed in: Thunderbird 78.8 In general, these flaws cannot be exploited through email in the Thunderbird product because scripting is disabled when reading mail, but are potentially risks in browser or browser-like contexts. # CVE-2021-23969: Content Security Policy violation report could have contained the destination of a redirect Reporter: Masato Kinugawa Impact: high Description As specified in the W3C Content Security Policy draft, when creating a violation report, "User agents need to ensure that the source file is the URL requested by the page, pre-redirects. If that's not possible, user agents need to strip the URL down to an origin to avoid unintentional leakage." Under certain types of redirects, Thunderbird incorrectly set the source file to be the destination of the redirects. This was fixed to be the redirect destination's origin. References o Bug 1542194 # CVE-2021-23968: Content Security Policy violation report could have contained the destination of a redirect Reporter: Ademar Nowasky Junior Impact: high Description If Content Security Policy blocked frame navigation, the full destination of a redirect served in the frame was reported in the violation report; as opposed to the original frame URI. This could be used to leak sensitive information contained in such URIs. References o Bug 1687342 # CVE-2021-23973: MediaError message property could have leaked information about cross-origin resources Reporter: Andreas Pehrson Impact: low Description When trying to load a cross-origin resource in an audio/video context a decoding error may have resulted, and the content of that error may have revealed information about the resource. References o Bug 1690976 # CVE-2021-23978: Memory safety bugs fixed in Thunderbird 78.8 Reporter: Mozilla developers Impact: high Description Mozilla developers Alexis Beingessner, Tyson Smith, Nika Layzell, and Mats Palmgren reported memory safety bugs present in Thunderbird 78.7. 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 Thunderbird 78.8 - --------------------------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. 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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 iQIVAwUBYDWIE+NLKJtyKPYoAQg0shAAjAe2G8wpxLuKrx7i3mlCJ+IqqzRaAlfO hfPxcNkiASKeB1RsT7ipGbaSJowobGsV9d181TKnrzmb0Pc/3LnXWw62eZ0alnla OTAI2DDB9gokpStK8PtjdxZBL7HRDf7Z5n+UR7KntgIPADZP4VeTVUhyuGtNHWDj NNMo1FHDy/Ncm1eg0esrzDecppJ/Iq3oN00KgaE86VHrDIhLsTTXAG8kh1fR0aPI oHxNLpST0oOioGLfiJG3dZNf4fhyeyL9t2S/1ESapisvhUcZ0h0bsCQ+43Dknqae Ija5MIhMvM3ogFL4CTZDvqsZEmZXcOKogHZU0Qv3AXFeiYRywFKO2IEcYyVZyNUT bW06cT0NsuyTaZ7e2RgoFxPXp4ZJji9XmNhUXZTXd2GELrDIkHpMTqfxNw1VhS6H JoFTnVIkAe34itzPwE7FE3Dh8LS++b95qkJRvoTYpJNiW2qKjCRWJo4X7Yw1X3fE 0sZf28ffvdvuNYf2yoS7C3vaoGYZDpo8csblmVtbYPlkUVyRW1MlymSbf8jRrDHw W7UL12ivfmCpAo/g1x58KmhDv6L/u/lZ9hWGwYUkcPpqUmnemzfTcN3lVx9PSCya vvLHJ9S8Q/li2BdkLXYtaQi7RAqci0TrufAZy8PchdCE3yLPOvESbaYnaHaZJ9D0 fVGTjMvqhTU= =Jouc -----END PGP SIGNATURE-----