A local attacker can trick the Mozilla Maintenance Service into applying an unsigned update file by pointing the service at an update file on a malicious SMB server. The update file can be replaced after the signature check, before the use, because the write-lock requested by the service does not work on a SMB server.
Note: This attack requires local system access and only affects Windows. Other operating systems are not affected. This vulnerability affects Firefox < 112, Firefox ESR < 102.10, and Thunderbird < 102.10.
[
{
"defaultStatus": "unaffected",
"product": "Firefox",
"vendor": "Mozilla",
"versions": [
{
"lessThan": "112",
"status": "affected",
"version": "unspecified",
"versionType": "custom"
}
]
},
{
"defaultStatus": "unaffected",
"product": "Firefox ESR",
"vendor": "Mozilla",
"versions": [
{
"lessThan": "102.10",
"status": "affected",
"version": "unspecified",
"versionType": "custom"
}
]
},
{
"defaultStatus": "unaffected",
"product": "Thunderbird",
"vendor": "Mozilla",
"versions": [
{
"lessThan": "102.10",
"status": "affected",
"version": "unspecified",
"versionType": "custom"
}
]
}
]