#VU12316 Missing authorization


Published: 2018-05-01

Vulnerability identifier: #VU12316

Vulnerability risk: Medium

CVSSv3.1: 7.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2016-10318

CWE-ID: CWE-862

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Linux kernel
Operating systems & Components / Operating system

Vendor: Linux Foundation

Description
The vulnerability allows a remote attacker to cause DoS condition on the target system.

The weakness exists in the fscrypt_process_policy function in fs/crypto/policy.c in the ext4 and f2fs filesystem encryption support due to missing authorization check. A remote attacker can assign an encryption policy to a directory owned by a different user and cause the service to crash.

Mitigation
Update to version 4.7.4.

Vulnerable software versions

Linux kernel: 4.7.0 - 4.7.3


CPE

External links
http://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=163ae1c6ad6299b19e22b4...


Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.


Latest bulletins with this vulnerability