There were code paths that nowadays call ISession::login directly thus bypassing the desired regeneration of the session ID. This moves the session regeneration deeper into the session handling and thus ensures that it is always called. Furthermore, I also added the session regeneration to the remember me cookie plus added some test case expectations for this.
PHP will handle session cookies with an empty values as an E_WARNING error. ([php/#68063](https://bugs.php.net/bug.php?id=68063))
ownCloud sets the cookie to an empty value in case the session expires, it however after this starts a new session. Due to potential race conditions this can in unlikely cases lead to the fact that the session never gets restarted and the user is left with an empty cookie. PHP tries then to use the empty cookie which makes the instance not usable.
To work around any race condition we now tell PHP to explicitly delete the value which can be done by using `null` as value, PHP will then send a cookie with the value "deleted". Also theepiration has been set to -1.
reduce calls of \OCP\Util::needUpgrade()
where \OCP\Util::needUpgrade() is called we can call as well
self::checkUpgrade and use the cached result
In line 877 the call way unnecessary anyway because of the first part of
the if statement
move caching to \OCP\Util::needUpgrade
renaming variable
fixing testNeedUpgradeCore()
cache result of checkUpgrade() in self::$needUpgrade
reduce calls of \OCP\Util::needUpgrade()
where \OCP\Util::needUpgrade() is called we can call as well
self::checkUpgrade and use the cached result
In line 877 the call way unnecessary anyway because of the first part of
the if statement
move caching to \OCP\Util::needUpgrade
renaming variable
fixing testNeedUpgradeCore()
fix typo in variable name
deleting tabs
add random number using OC.parseQueryString and _.extend()
version rollback: add missing prefix to OC\Preview::post_delete
add test to assure that the rollback hook is called
Given the fact that "/tests" is not shipped by default and this has broken some applications and frustrated quite some people we should add "/tests" to the default allowed autoloading set.
I do consider the security impact marginally since the /tests folder is not shipped within the release as well as usually has a hard requirement on being called by phpunit.
Apps to update and to disable will always be shown.
Main title changes only when apps need updated, not core.
Added bullet style.
Exclude incompatible apps from updated apps list.
While BREACH requires the following three factors to be effectively exploitable we should add another mitigation:
1. Application must support HTTP compression
2. Response most reflect user-controlled input
3. Response should contain sensitive data
Especially part 2 is with ownCloud not really given since user-input is usually only echoed if a CSRF token has been passed.
To reduce the risk even further it is however sensible to encrypt the CSRF token with a shared secret. Since this will change on every request an attack such as BREACH is not feasible anymore against the CSRF token at least.
