Junsung Lee discovered that Thunderbird did not properly validate the text direction override unicode character in filenames. An attacker could potentially exploits this issue by spoofing file extension while attaching a file in emails. (CVE-2023-3417)
Max Vlasov discovered that Thunderbird Offscreen Canvas did not properly track cross-origin tainting. An attacker could potentially exploit this issue to access image data from another site in violation of same-origin policy. (CVE-2023-4045)
Alexander Guryanov discovered that Thunderbird did not properly update the value of a global variable in WASM JIT analysis in some circumstances. An attacker could potentially exploit this issue to cause a denial of service. (CVE-2023-4046)
Mark Brand discovered that Thunderbird did not properly validate the size of an untrusted input stream. An attacker could potentially exploit this issue to cause a denial of service. (CVE-2023-4050)
Multiple security issues were discovered in Thunderbird. If a user were tricked into opening a specially crafted website in a browsing context, an attacker could potentially exploit these to cause a denial of service, obtain sensitive information, bypass security restrictions, cross-site tracing, or execute arbitrary code. (CVE-2023-4047, CVE-2023-4048, CVE-2023-4049, CVE-2023-4055, CVE-2023-4056)
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