CVE-2007-4849 Missing authorization in n/a
Local users can bypass file permissions on JFFS2 filesystems with POSIX ACLs enabled, potentially accessing or modifying restricted files after a remount.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2007-4849?
CVE-2007-4849 is a medium-severity missing authorization vulnerability in n/a, published on 12 Sep 2007. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
JFFS2, as used on One Laptop Per Child (OLPC) build 542 and possibly other Linux systems, when POSIX ACL support is enabled, does not properly store permissions during (1) inode creation or (2) ACL setting, which might allow local users to access restricted files or directories after a remount of a filesystem, related to "legacy modes" and an inconsistency between dentry permissions and inode permissions.
Weakness: CWE-264
Which versions are affected by CVE-2007-4849?
It affects 1 product.
Products include One Laptop per Child Olpc Linux.
How do I fix CVE-2007-4849?
Apply the vendor's patch.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2007-4849 being exploited?
There is no known exploitation of CVE-2007-4849 in the wild and no public exploit code.
Sources
Also known as GHSA-ffmh-3m8x-67m8.