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[stable27] fix(dav): Restrict properties allowed object classes #55856

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Merged
nickvergessen merged 4 commits into from
Oct 20, 2025
Merged

[stable27] fix(dav): Restrict properties allowed object classes #55856

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3bdbd3b
fix(dav): Restrict properties allowed object classes
come-nc Oct 14, 2025
cfe6b46
fix(dav): Allow arrays (of scalars) in property values
come-nc Oct 14, 2025
b2ba91b
fix(dav): Allow array of array of scalars, and fix error message
come-nc Oct 16, 2025
bbab678
fix(dav): Adapt changes to stable28 code
come-nc Oct 20, 2025
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fix(dav): Restrict properties allowed object classes 
Signed-off-by: Côme Chilliet <[email protected]>
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@come-nc
come-nc committed Oct 20, 2025
commit 3bdbd3b4fb5cc025f35d64cd617f0d8108c2d3f7
21 changes: 18 additions & 3 deletions apps/dav/lib/DAV/CustomPropertiesBackend.php
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Original file line number Diff line number Diff line change
Expand Up @@ -441,6 +441,19 @@ private function encodeValueForDatabase($value): array {
$valueType = self::PROPERTY_TYPE_XML;
$value = $value->getXml();
} else {
if (!is_object($value)) {
throw new DavException(
"Property \"$name\" has an invalid value of type " . gettype($value),
);
}
if (!str_starts_with($value::class, 'Sabre\\DAV\\Xml\\Property\\')
&& !str_starts_with($value::class, 'Sabre\\CalDAV\\Xml\\Property\\')
&& !str_starts_with($value::class, 'Sabre\\CardDAV\\Xml\\Property\\')
&& !str_starts_with($value::class, 'OCA\\DAV\\')) {
throw new DavException(
"Property \"$name\" has an invalid value of class " . $value::class,
);
}
$valueType = self::PROPERTY_TYPE_OBJECT;
$value = serialize($value);
}
Expand All @@ -450,16 +463,18 @@ private function encodeValueForDatabase($value): array {
/**
* @return mixed|Complex|string
*/
private function decodeValueFromDatabase(string $value, int $valueType) {
private function decodeValueFromDatabase(string $value, int $valueType): mixed {
switch ($valueType) {
case self::PROPERTY_TYPE_XML:
return new Complex($value);
case self::PROPERTY_TYPE_OBJECT:
if (!preg_match('/^O\:\d+\:\"(OCA\\\\DAV\\\\|Sabre\\\\(Cal|Card)?DAV\\\\Xml\\\\Property\\\\)/', $value)) {
throw new \LogicException('Found an object class serialized in DB that is not allowed');
}
return unserialize($value);
case self::PROPERTY_TYPE_STRING:
default:
return $value;
}
};
}

private function createDeleteQuery(): IQueryBuilder {
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