CVE-2024-5691

Al engañar al navegador con un encabezado `X-Frame-Options`, un iframe en espacio aislado podría haber presentado un botón que, si un usuario hiciera clic en él, evitaría las restricciones para abrir una nueva ventana. Esta vulnerabilidad afecta a Firefox < 127 y Firefox ESR < 115.12.

The Mozilla Foundation Security Advisory describes this flaw as: By tricking the browser with a `X-Frame-Options` header, a sandboxed iframe could have presented a button that, if clicked by a user, would bypass restrictions to open a new window.

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. Luan Herrera discovered that Thunderbird did not properly validate the X-Frame-Options header inside sandboxed iframe. An attacker could potentially exploit this issue to bypass sandbox restrictions to open a new window.