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[stable32] fix(dav): Restrict properties allowed object classes #55851

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Merged
nickvergessen merged 3 commits into from
Oct 20, 2025
Merged

[stable32] fix(dav): Restrict properties allowed object classes #55851

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22f122e
fix(dav): Restrict properties allowed object classes
come-nc Oct 14, 2025
2272860
fix(dav): Allow arrays (of scalars) in property values
come-nc Oct 14, 2025
eeb1dc8
fix(dav): Allow array of array of scalars, and fix error message
come-nc Oct 16, 2025
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fix(dav): Allow arrays (of scalars) in property values 
Signed-off-by: Côme Chilliet <[email protected]>
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@come-nc
come-nc committed Oct 20, 2025
commit 22728601ba4d7b62486662a33aa30580848149f4
15 changes: 14 additions & 1 deletion apps/dav/lib/DAV/CustomPropertiesBackend.php
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Original file line number Diff line number Diff line change
Expand Up @@ -605,7 +605,16 @@ private function encodeValueForDatabase(string $path, string $name, mixed $value
$valueType = self::PROPERTY_TYPE_HREF;
$value = $value->getHref();
} else {
if (!is_object($value)) {
if (is_array($value)) {
// For array only allow scalar values
foreach ($value as $item) {
if (!is_scalar($item)) {
throw new DavException(
"Property \"$name\" has an invalid value of array containing " . gettype($value),
);
}
}
} elseif (!is_object($value)) {
throw new DavException(
"Property \"$name\" has an invalid value of type " . gettype($value),
);
Expand Down Expand Up @@ -636,6 +645,10 @@ private function decodeValueFromDatabase(string $value, int $valueType): mixed {
case self::PROPERTY_TYPE_HREF:
return new Href($value);
case self::PROPERTY_TYPE_OBJECT:
if (preg_match('/^a:/', $value)) {
// Array, unserialize only scalar values
return unserialize(str_replace('\x00', chr(0), $value), ['allowed_classes' => false]);
}
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');
}
Expand Down