==================================================================== CERT-Renater Note d'Information No. 2021/VULN226 _____________________________________________________________________ DATE : 20/04/2021 HARDWARE PLATFORM(S): / OPERATING SYSTEM(S): Systems running Thunderbird versions prior to 78.10. ===================================================================== https://www.mozilla.org/en-US/security/advisories/mfsa2021-14/ _____________________________________________________________________ Mozilla Foundation Security Advisory 2021-14 Security Vulnerabilities fixed in Thunderbird 78.10 Announced April 19, 2021 Impact high Products Thunderbird Fixed in Thunderbird 78.10 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-2021-23994: Out of bound write due to lazy initialization Reporter Abraruddin Khan and Omair Impact high Description A WebGL framebuffer was not initialized early enough, resulting in memory corruption and an out of bound write. References Bug 1699077 #CVE-2021-23995: Use-after-free in Responsive Design Mode Reporter Irvan Kurniawan Impact high Description When Responsive Design Mode was enabled, it used references to objects that were previously freed. We presume that with enough effort this could have been exploited to run arbitrary code. References Bug 1699835 #CVE-2021-23998: Secure Lock icon could have been spoofed Reporter Jordi Chancel Impact moderate Description Through complicated navigations with new windows, an HTTP page could have inherited a secure lock icon from an HTTPS page. References Bug 1667456 #CVE-2021-23961: More internal network hosts could have been probed by a malicious webpage Reporter Samy Kamkar, Ben Seri, and Gregory Vishnepolsky Impact moderate Description Further techniques that built on the slipstream research combined with a malicious webpage could have exposed both an internal network's hosts as well as services running on the user's local machine. References Bug 1677940 #CVE-2021-23999: Blob URLs may have been granted additional privileges Reporter Nika Layzell Impact moderate Description If a Blob URL was loaded through some unusual user interaction, it could have been loaded by the System Principal and granted additional privileges that should not be granted to web content. References Bug 1691153 #CVE-2021-24002: Arbitrary FTP command execution on FTP servers using an encoded URL Reporter Daniel Santos Impact moderate Description When a user clicked on an FTP URL containing encoded newline characters (%0A and %0D), the newlines would have been interpreted as such and allowed arbitrary commands to be sent to the FTP server. References Bug 1702374 #CVE-2021-29945: Incorrect size computation in WebAssembly JIT could lead to null-reads Reporter Christian Holler Impact moderate Description The WebAssembly JIT could miscalculate the size of a return type, which could lead to a null read and result in a crash. Note: This issue only affected x86-32 platforms. Other platforms are unaffected. References Bug 1700690 #CVE-2021-29946: Port blocking could be bypassed Reporter Frederik Braun Impact low Description Ports that were written as an integer overflow above the bounds of a 16-bit integer could have bypassed port blocking restrictions when used in the Alt-Svc header. References Bug 1698503 #CVE-2021-29948: Race condition when reading from disk while verifying signatures Reporter Cure53 Impact low Description Signatures are written to disk before and read during verification, which might be subject to a race condition when a malicious local process or user is replacing the file. References Bug 1692899 ========================================================= + CERT-RENATER | tel : 01-53-94-20-44 + + 23/25 Rue Daviel | fax : 01-53-94-20-41 + + 75013 Paris | email:cert@support.renater.fr + =========================================================