CVE-2023-6208

Al usar X11, el texto seleccionado por la página usando la API de selección se copiaba erróneamente en la selección principal, un almacenamiento temporal similar al portapapeles. *Este error sólo afecta a Thunderbird en X11. Otros sistemas no se ven afectados.* Esta vulnerabilidad afecta a Firefox < 120, Firefox < 115.5 y Thunderbird < 115.5.0.

The Mozilla Foundation Security Advisory describes this flaw as: When using X11, text selected by the page using the Selection API was erroneously copied into the primary selection, a temporary storage not unlike the clipboard. *This bug only affects Firefox on X11. Other systems are unaffected.*

When using X11, text selected by the page using the Selection API was erroneously copied into the primary selection, a temporary storage not unlike the clipboard. *This bug only affects Firefox on X11. Other systems are unaffected.* This vulnerability affects Firefox < 120, Firefox ESR < 115.5.0, and Thunderbird < 115.5.

USN-6509-1 fixed vulnerabilities in Firefox. The update introduced several minor regressions. This update fixes the problem. Multiple security issues were discovered in Firefox. If a user were tricked into opening a specially crafted website, an attacker could potentially exploit these to cause a denial of service, obtain sensitive information across domains, or execute arbitrary code. It was discovered that Firefox did not properly manage memory when images were created on the canvas element. An attacker could potentially exploit this issue to obtain sensitive information. It discovered that Firefox incorrectly handled certain memory when using a MessagePort. An attacker could potentially exploit this issue to cause a denial of service. It discovered that Firefox incorrectly did not properly manage ownership in ReadableByteStreams. An attacker could potentially exploit this issue to cause a denial of service. It discovered that Firefox incorrectly did not properly manage copy operations when using Selection API in X11. An attacker could potentially exploit this issue to obtain sensitive information. Rachmat Abdul Rokhim discovered incorrectly handled parsing of relative URLS starting with "///". An attacker could potentially exploit this issue to cause a denial of service.