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Code Issues Releases Wiki Activity

[mv3] Slightly mitigate DNR flaw re. removeparam filters

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Related issue:
https://github.com/uBlockOrigin/uBOL-home/issues/140

This will allow more specific `removeparam` filters to override
generic ones. This doesn't fix the related issue but should help
more specific `removeparam` filters to be applied.

Related webextensions issue:
https://github.com/w3c/webextensions/issues/468
This commit is contained in:
Raymond Hill 2024-11-15 10:01:29 -05:00
parent 7fcd2a51be
commit 947602d4fe
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GPG Key ID: 25E1490B761470C2
1 changed files with 24 additions and 12 deletions
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36
src/js/static-net-filtering.js
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@ -4452,22 +4452,23 @@ StaticNetFilteringEngine.prototype.dnrFromCompiled = function(op, context, ...ar
} }
// Priority: // Priority:
// Block: 1 (default priority) // Removeparam: 1-4
// Redirect: 2-9 // Block: 10 (default priority)
// Excepted redirect: 12-19 // Redirect: 11-19
// Allow: 20 // Excepted redirect: 21-29
// Block important: 30 // Allow: 30
// Redirect important: 32-39 // Block important: 40
// Redirect important: 41-49
const realms = new Map([ const realms = new Map([
[ BLOCK_REALM, { type: 'block', priority: 0 } ], [ BLOCK_REALM, { type: 'block', priority: 10 } ],
[ ALLOW_REALM, { type: 'allow', priority: 20 } ], [ ALLOW_REALM, { type: 'allow', priority: 30 } ],
[ REDIRECT_REALM, { type: 'redirect', priority: 2 } ], [ REDIRECT_REALM, { type: 'redirect', priority: 11 } ],
[ REMOVEPARAM_REALM, { type: 'removeparam', priority: 0 } ], [ REMOVEPARAM_REALM, { type: 'removeparam', priority: 0 } ],
[ CSP_REALM, { type: 'csp', priority: 0 } ], [ CSP_REALM, { type: 'csp', priority: 0 } ],
[ PERMISSIONS_REALM, { type: 'permissions', priority: 0 } ], [ PERMISSIONS_REALM, { type: 'permissions', priority: 0 } ],
[ URLTRANSFORM_REALM, { type: 'uritransform', priority: 0 } ], [ URLTRANSFORM_REALM, { type: 'uritransform', priority: 0 } ],
[ HEADERS_REALM, { type: 'block', priority: 0 } ], [ HEADERS_REALM, { type: 'block', priority: 10 } ],
[ URLSKIP_REALM, { type: 'urlskip', priority: 0 } ], [ URLSKIP_REALM, { type: 'urlskip', priority: 0 } ],
]); ]);
const partyness = new Map([ const partyness = new Map([
@ -4605,7 +4606,7 @@ StaticNetFilteringEngine.prototype.dnrFromCompiled = function(op, context, ...ar
if ( token !== '' ) { if ( token !== '' ) {
const match = /:(\d+)$/.exec(token); const match = /:(\d+)$/.exec(token);
if ( match !== null ) { if ( match !== null ) {
rule.priority = Math.min(rule.priority + parseInt(match[1], 10), 9); rule.priority += Math.min(rule.priority + parseInt(match[1], 10), 9);
token = token.slice(0, match.index); token = token.slice(0, match.index);
} }
} }
@ -4623,7 +4624,7 @@ StaticNetFilteringEngine.prototype.dnrFromCompiled = function(op, context, ...ar
} }
break; break;
} }
case 'removeparam': case 'removeparam': {
rule.action.type = 'redirect'; rule.action.type = 'redirect';
if ( rule.__modifierValue === '|' ) { if ( rule.__modifierValue === '|' ) {
rule.__modifierValue = ''; rule.__modifierValue = '';
@ -4657,10 +4658,21 @@ StaticNetFilteringEngine.prototype.dnrFromCompiled = function(op, context, ...ar
'xmlhttprequest', 'xmlhttprequest',
]; ];
} }
// https://github.com/uBlockOrigin/uBOL-home/issues/140
// Mitigate until DNR API flaw is addressed by browser vendors
let priority = rule.priority || 1;
if ( rule.condition.urlFilter !== undefined ) { priority += 1; }
if ( rule.condition.regexFilter !== undefined ) { priority += 1; }
if ( rule.condition.initiatorDomains !== undefined ) { priority += 1; }
if ( rule.condition.requestDomains !== undefined ) { priority += 1; }
if ( priority !== 1 ) {
rule.priority = priority;
}
if ( rule.__modifierAction === ALLOW_REALM ) { if ( rule.__modifierAction === ALLOW_REALM ) {
dnrAddRuleError(rule, `Unsupported removeparam exception: ${rule.__modifierValue}`); dnrAddRuleError(rule, `Unsupported removeparam exception: ${rule.__modifierValue}`);
} }
break; break;
}
case 'uritransform': { case 'uritransform': {
dnrAddRuleError(rule, `Incompatible with DNR: uritransform=${rule.__modifierValue}`); dnrAddRuleError(rule, `Incompatible with DNR: uritransform=${rule.__modifierValue}`);
break; break;