0001-SECURITY-Move-badFile-lookup-to-Linker.patch
Arlolra (Arlo Breault)
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	Arlolra
	Jun 29 2023, 9:11 PM

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0001-SECURITY-Move-badFile-lookup-to-Linker.patch
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	From 1094aed1d30e2d6a8c10241211565c6b68e554dd Mon Sep 17 00:00:00 2001
	From: Arlo Breault <abreault@wikimedia.org>
	Date: Thu, 29 Jun 2023 17:03:15 -0400
	Subject: [PATCH] SECURITY: Move badFile lookup to Linker

	Bug: T335612
	Change-Id: I849d02f1d3dc9995353b7a9995601d214053dca3
	---
	includes/Linker.php \| 18 ++++++++++++++----
	includes/parser/Parser.php \| 34 ++++++++++++++++------------------
	2 files changed, 30 insertions(+), 22 deletions(-)

	diff --git a/includes/Linker.php b/includes/Linker.php
	index 39f15ec3104..f81c4ab6be2 100644
	--- a/includes/Linker.php
	+++ b/includes/Linker.php
	@@ -392,7 +392,7 @@ class Linker {
	$frameParams['align'] = $parser->getTargetLanguage()->alignEnd();
	}
	return $prefix .
	- self::makeThumbLink2( $title, $file, $frameParams, $handlerParams, $time, $query ) .
	+ self::makeThumbLink2( $title, $file, $frameParams, $handlerParams, $time, $query, $parser ) .
	$postfix;
	}

	@@ -413,7 +413,10 @@ class Linker {
	$thumb = false;
	}

	- if ( !$thumb ) {
	+ $isBadFile = $file && $thumb && $parser &&
	+ $parser->getBadFileLookup()->isBadFile( $title->getDBkey(), $parser->getTitle() );
	+
	+ if ( !$thumb \|\| $isBadFile ) {
	$s = self::makeBrokenImageLinkObj( $title, $frameParams['title'], '', '', '', $time == true );
	} else {
	self::processResponsiveImages( $file, $thumb, $handlerParams );
	@@ -511,10 +514,11 @@ class Linker {
	* @param array $handlerParams
	* @param bool $time
	* @param string $query
	+ * @param Parser\|null $parser
	* @return string
	*/
	public static function makeThumbLink2( LinkTarget $title, $file, $frameParams = [],
	- $handlerParams = [], $time = false, $query = ""
	+ $handlerParams = [], $time = false, $query = "", ?Parser $parser = null
	) {
	$exists = $file && $file->exists();

	@@ -594,10 +598,16 @@ class Linker {
	$s = "<div class=\"thumb t{$frameParams['align']}\">"
	. "<div class=\"thumbinner\" style=\"width:{$outerWidth}px;\">";

	+ $isBadFile = $exists && $thumb && $parser &&
	+ $parser->getBadFileLookup()->isBadFile(
	+ $manualthumb ? $manual_title : $title->getDBkey(),
	+ $parser->getTitle()
	+ );
	+
	if ( !$exists ) {
	$s .= self::makeBrokenImageLinkObj( $title, $frameParams['title'], '', '', '', $time == true );
	$zoomIcon = '';
	- } elseif ( !$thumb ) {
	+ } elseif ( !$thumb \|\| $isBadFile ) {
	$s .= wfMessage( 'thumbnail_error', '' )->escaped();
	$zoomIcon = '';
	} else {
	diff --git a/includes/parser/Parser.php b/includes/parser/Parser.php
	index 1295165d0b9..4a1615f9007 100644
	--- a/includes/parser/Parser.php
	+++ b/includes/parser/Parser.php
	@@ -2616,25 +2616,23 @@ class Parser {
	}

	if ( $ns == NS_FILE ) {
	- if ( !$this->badFileLookup->isBadFile( $nt->getDBkey(), $this->getTitle() ) ) {
	- if ( $wasblank ) {
	- # if no parameters were passed, $text
	- # becomes something like "File:Foo.png",
	- # which we don't want to pass on to the
	- # image generator
	- $text = '';
	- } else {
	- # recursively parse links inside the image caption
	- # actually, this will parse them in any other parameters, too,
	- # but it might be hard to fix that, and it doesn't matter ATM
	- $text = $this->handleExternalLinks( $text );
	- $holders->merge( $this->handleInternalLinks2( $text ) );
	- }
	- # cloak any absolute URLs inside the image markup, so handleExternalLinks() won't touch them
	- $s .= $prefix . $this->armorLinks(
	- $this->makeImage( $nt, $text, $holders ) ) . $trail;
	- continue;
	+ if ( $wasblank ) {
	+ # if no parameters were passed, $text
	+ # becomes something like "File:Foo.png",
	+ # which we don't want to pass on to the
	+ # image generator
	+ $text = '';
	+ } else {
	+ # recursively parse links inside the image caption
	+ # actually, this will parse them in any other parameters, too,
	+ # but it might be hard to fix that, and it doesn't matter ATM
	+ $text = $this->handleExternalLinks( $text );
	+ $holders->merge( $this->handleInternalLinks2( $text ) );
	}
	+ # cloak any absolute URLs inside the image markup, so handleExternalLinks() won't touch them
	+ $s .= $prefix . $this->armorLinks(
	+ $this->makeImage( $nt, $text, $holders ) ) . $trail;
	+ continue;
	} elseif ( $ns == NS_CATEGORY ) {
	/**
	* Strip the whitespace Category links produce, see T2087
	--
	2.41.0

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0001-SECURITY-Move-badFile-lookup-to-Linker.patch
Arlolra (Arlo Breault)
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0001-SECURITY-Move-badFile-lookup-to-Linker.patch
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