Silverstripe Assets Module has a DBFile::getURL() permission bypass

The Silverstripe Assets Module is a required component of Silverstripe Framework. In versions prior to 2.4.5 and 3.0.0-rc1 through 3.1.2, images rendered in templates or otherwise accessed via DBFile::getURL() or DBFile::getSourceURL() incorrectly add an access grant to the current session, which bypasses file permissions. This usually happens when creating an image variant, for example using a manipulation method like ScaleWidth() or Convert(). Note that if developers use DBFile directly in the $db configuration for a DataObject class that doesn't subclass File, and if they were setting the visibility of those files to "protected", those files will now need an explicit access grant to be accessed. If developers do not want to explicitly provide access grants for these files in their apps (i.e. they want these files to be accessible by default), they should use the "public" visibility. This issue has been fixed in versions 2.4.5 and 3.1.3.

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

授权机制不正确

SilverStripe Assets Module 安全漏洞

SilverStripe Assets Module是新西兰SilverStripe公司的一个 SilverStripe 框架的资产组件。 Silverstripe Assets Module 2.4.5之前版本和3.0.0-rc1至3.1.2版本存在安全漏洞，该漏洞源于错误添加访问授权，可能导致绕过文件权限。

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