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Unescaped escaped commas in regex-based removeparam values
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Related discussion:
- uBlockOrigin/uAssets#14683 (comment)
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@gorhill
gorhill committed Sep 8, 2022
1 parent 2fc5cd0 commit f806438
Showing 1 changed file with 5 additions and 1 deletion.
6 changes: 5 additions & 1 deletion src/js/static-net-filtering.js
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Expand Up @@ -3427,14 +3427,18 @@ class FilterCompiler {
}
}

// https://github.com/uBlockOrigin/uAssets/discussions/14683#discussioncomment-3559284
// If the removeparam value is a regex, unescape escaped commas
extractTokenFromQuerypruneValue() {
const pattern = this.modifyValue;
if ( pattern === '*' || pattern.charCodeAt(0) === 0x7E /* '~' */ ) {
return;
}
const match = /^\/(.+)\/i?$/.exec(pattern);
if ( match !== null ) {
return this.extractTokenFromRegex(match[1]);
return this.extractTokenFromRegex(
match[1].replace(/(\{\d*)\\,/, '$1,')
);
}
if ( pattern.startsWith('|') ) {
return this.extractTokenFromRegex('\\b' + pattern.slice(1));
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6 comments on commit f806438

@gwarser
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@gwarser gwarser commented on f806438 Nov 9, 2022 •
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"Related discussion" was removed:

Actually there is an issue with a specific filter in there which causes it to be suboptimal:

$removeparam=/^__s=[A-Za-z0-9]{6\,}/,domain=~univis.uni-erlangen.de|~univis.uni-bamberg.de|~univis.uni-luebeck.de|~univis.uni-kiel.de|~univis.th-koeln.de

It's supposed to be tokenizable (s being the token), but uBO detects the regex as invalid because of the \, in the quantifier part of the regex. This needs fixing.

@gorhill
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@gorhill gorhill commented on f806438 Nov 9, 2022 •
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Ok sorry, just quite confused here, I am not understanding what is being said here. I see s being used as token with or without the backslash.

@gwarser
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@gwarser gwarser commented on f806438 Nov 9, 2022

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This is quote from you. I forwarded the whole thread to ubo-security@... for you.

@gorhill
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@gorhill gorhill commented on f806438 Nov 9, 2022

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I am not getting new email for ubo-security@.... Why was the discussion removed?

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@gwarser gwarser commented on f806438 Nov 9, 2022

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It was about performance of $removeparam and proposition to enable some param cleaning lists by default.

I am not getting new email for ubo-security@....

¯\_(ツ)_/¯

I did not get a bounce message.

Why was the discussion removed?

No idea.

@gorhill
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@gorhill gorhill commented on f806438 Nov 9, 2022

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Ok, just fixed an issue with email's server config, got your email.

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