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