Title: Encrypted Virtual Filesystem Local Heap Overrun Vulnerability
Severity: MODERATE
Description:
Encrypted Virtual Filesystem (EVFS) is a virtual filesystem that runs on top of the Linux VFS. It allows multiple users to each mount their own encrypted filesystems using individual keys. It is available for the Linux operating system.
A vulnerability has been discovered in the 'efs' utility used by EVFS. The problem occurs during the 'do_mount()' function within the efs.c source file. During a call to salloc(), the size calculation fails to take the size of the 'to' argument into account. Data greater then that allocated may subsequently be written into the buffer. As a result, it may be possible for an attacker to corrupt sensitive memory management information.
Successful exploitation of this vulnerability could allow a legitimate EVFS user to execute arbitrary commands with root privileges.
This vulnerability affects EVFS v0.2, however earlier versions may also be affected.
Affected Products:
- sd Encrypted Virtual Filesystem 0.2.0
References:
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