CVE-2022-26387

Al instalar un complemento, Firefox verificaba la firma antes de avisar al usuario; pero mientras el usuario confirmaba el mensaje, el archivo complementario subyacente podría haberse modificado y Firefox no se habría dado cuenta. Esta vulnerabilidad afecta a Firefox < 98, Firefox ESR < 91,7 y Thunderbird < 91.7.

A flaw was found in Mozilla. The Mozilla Foundation Security Advisory describes this flaw as follows: When installing an add-on, Firefox verified the signature before prompting the user; but while the user was confirming the prompt, the underlying add-on file could have been modified, and Firefox would not have noticed.

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, bypass security restrictions, obtain sensitive information, cause undefined behaviour, spoof the browser UI, or execute arbitrary code. It was discovered that extensions of a particular type could auto-update themselves and bypass the prompt that requests permissions. If a user were tricked into installing a specially crafted extension, an attacker could potentially exploit this to bypass security restrictions.