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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2020.2442 MFSA 2020-29 Security Vulnerabilities fixed in Thunderbird 78 17 July 2020 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: Thunderbird Publisher: Mozilla Operating System: Windows UNIX variants (UNIX, Linux, OSX) Impact/Access: Execute Arbitrary Code/Commands -- Remote with User Interaction Denial of Service -- Remote with User Interaction Access Confidential Data -- Remote with User Interaction Unauthorised Access -- Remote with User Interaction Reduced Security -- Remote with User Interaction Resolution: Patch/Upgrade CVE Names: CVE-2020-15648 CVE-2020-12426 CVE-2020-12425 CVE-2020-12424 CVE-2020-12423 CVE-2020-12422 CVE-2020-12421 CVE-2020-12420 CVE-2020-12419 CVE-2020-12418 CVE-2020-12417 CVE-2020-12416 CVE-2020-12415 CVE-2020-12402 Reference: ESB-2020.2305 ESB-2020.2304 ESB-2020.2292 ESB-2020.2277 Original Bulletin: https://www.mozilla.org/en-US/security/advisories/mfsa2020-29/ - --------------------------BEGIN INCLUDED TEXT-------------------- Mozilla Foundation Security Advisory 2020-29 Security Vulnerabilities fixed in Thunderbird 78 Announced July 16, 2020 Impact high Products Thunderbird Fixed in Thunderbird 78 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-2020-12415: AppCache manifest poisoning due to url encoded character processing Reporter Kevin Higgs Impact high Description When %2F was present in a manifest URL, Thunderbird's AppCache behavior may have become confused and allowed a manifest to be served from a subdirectory. This could cause the appcache to be used to service requests for the top level directory. References o Bug 1586630 # CVE-2020-12416: Use-after-free in WebRTC VideoBroadcaster Reporter Alex Mayorga Impact high Description A VideoStreamEncoder may have been freed in a race condition with VideoBroadcaster::AddOrUpdateSink , resulting in a use-after-free, memory corruption, and a potentially exploitable crash. References o Bug 1639734 # 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-2020-15648: X-Frame-Options bypass using object or embed tags Reporter Frederik Braun Impact moderate Description Using object or embed tags, it was possible to frame other websites, even if they disallowed framing using the X-Frame-Options header. Note: This issue is pending a CVE assignment and will be updated when one is available. References o Bug 1644076 # CVE-2020-12402: RSA Key Generation vulnerable to side-channel attack Reporter Sohaib ul Hassan, Iaroslav Gridin, Ignacio M. Delgado-Lozano, Cesar Pereida Garcia, Jesus-Javier Chi-Dominguez, Alejandro Cabrera Aldaya, and Billy Bob Brumley, Network and Information Security (NISEC) Group, Tampere University, Finland Impact moderate Description During RSA key generation, bignum implementations used a variation of the Binary Extended Euclidean Algorithm which entailed significantly input-dependent flow. This allowed an attacker able to perform electromagnetic-based side channel attacks to record traces leading to the recovery of the secret primes. We would like to thank Sohaib ul Hassan for contributing a fix for this issue as well. Note: An unmodified Firefox browser does not generate RSA keys in normal operation and is not affected, but products built on top of it might. References o Bug 1631597 # 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 # CVE-2020-12422: Integer overflow in nsJPEGEncoder::emptyOutputBuffer Reporter Ronald Crane Impact moderate Description In non-standard configurations, a JPEG image created by JavaScript could have caused an internal variable to overflow, resulting in an out of bounds write, memory corruption, and a potentially exploitable crash. References o Bug 1450353 # CVE-2020-12423: DLL Hijacking due to searching %PATH% for a library Reporter Riccardo Ancarani Impact moderate Description When the Windows DLL "webauthn.dll" was missing from the Operating System, and a malicious one was placed in a folder in the user's %PATH%, Thunderbird may have loaded the DLL, leading to arbitrary code execution. Note: This issue only affects the Windows operating system; other operating systems are unaffected. References o Bug 1642400 # CVE-2020-12424: WebRTC permission prompt could have been bypassed by a compromised content process Reporter Paul Theriault Impact low Description When constructing a permission prompt for WebRTC, a URI was supplied from the content process. This URI was untrusted, and could have been the URI of an origin that was previously granted permission; bypassing the prompt. References o Bug 1562600 # CVE-2020-12425: Out of bound read in Date.parse() Reporter Bruno Keith Impact low Description Due to confusion processing a hyphen character in Date.parse(), a one-byte out of bounds read could have occurred, leading to potential information disclosure. References o Bug 1634738 # CVE-2020-12426: Memory safety bugs fixed in Thunderbird 78 Reporter Mozilla developers and community Impact high Description Mozilla developers and community members Bob Clary, Benjamin Bouvier, Calixte Denizet, Christian Holler reported memory safety bugs present in Thunderbird 77. 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 - --------------------------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: http://www.auscert.org.au/render.html?it=1967 iQIVAwUBXxEtzeNLKJtyKPYoAQg4cA//ez9X5sA1EnzgUn7UAYT1JYo8UKd4+OAt p2443iKxA3WojWauOLik78A/VkBMgpDjfBrI1hqjzTqW4HJvEP/ohFifKLBDloh6 qL5QuHhUdkP46u9gwTaqbnZ1vpVuz5jCjGYJDehZsWBBnziJLorIjiclkJZQ0N4A TlUokI/p/oMSnEhpm70AbOmdLcmpk9WVPWXmjf7Midcw7Th7s2KcCsTqc83AxjRL JaI7/DbaJPMdYqHEACsdHEWoKQKU3MKd/uwv125TOd2nEww8V1uRNF2PvE5lEwso auVt1vSaZd22VwHL9HPwW/MhZ7YguhFu3AM+0zhh3yBmVGifV4xStHYEJOc5kOBA x4QO/Yg7LSitN15iNL31R0I5e24L4H32/fwaBw8fr+YdnIqU85/wgq663GLu3DOe En/VP7/oCCZjULcvMifDssUqJ861CXI8oW/7kG+j62KLpM5wxcJqGUDkLFufU10+ 6fV6EFcow0FzivnfeWEnFqYSXSvGENPyVBSFhKiGwZ95pJNuM5IsdI5LBzpt/fki QA1GA0n8GT4Y2EurYAx5rHpyLtuJo7iEf+OGOfMwDugUkB0eKijPlyL+lN3hL2jJ FlNuxE1t1dq2SHOacMlO4yVWtJ3GwmYgUd7AvRCQ3nVNeN0i9MonPeOtx5OppN7c b/VkI+FLZ6U= =SogM -----END PGP SIGNATURE-----