Affected: Mozilla Thunderbird

Thunderbird allowed the Text Direction Override Unicode Character in filenames. An email attachment could be incorrectly shown as being a document file, while in fact it was an executable file. Newer versions of Thunderbird will strip the character and show the correct file extension. This vulnerability affects Thunderbird < 115.0.1 and Thunderbird < 102.13.1.

Affected: Ubuntu:20.04:LTS: thunderbird, Ubuntu:22.04:LTS: thunderbird

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)