#VU6642 Permissions, Privileges, and Access Controls in Linux kernel - CVE-2016-10044

Vulnerability identifier: #VU6642

Vulnerability risk: Low

CVSSv4.0: 5.9 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2016-10044

CWE-ID: CWE-264

Exploitation vector: Local

Exploit availability: No

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

Vendor: Linux Foundation

Description

The vulnerability allows a local user to escalate privileges on the system.

The vulnerability exists due to improper privilege management within the aio_mount() function in fs/aio.c. A local user can bypass SELinux W^X policy restrictions and execute arbitrary code with elevated privileges.

Vulnerable software versions

Linux kernel: before 4.7.7, 4.7.7

---

External links
https://github.com/torvalds/linux/commit/22f6b4d34fcf039c63a94e7670e0da24f8575a5a
https://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.7.7
https://source.android.com/security/bulletin/2017-02-01.html
https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=22f6b4d34fcf039c63a94e7670e0da24f8575a5a

---

Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

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