Permissions, privileges, and access controls in Linux kernel

1) Permissions, privileges, and access controls

EUVDB-ID: #VU92434

Risk: Low

CVSSv3.1: 6.8 [CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2015-9004

CWE-ID: CWE-264 - Permissions, Privileges, and Access Controls

Exploit availability: No

Description

The vulnerability allows a local non-authenticated attacker to execute arbitrary code.

The vulnerability exists due to permissions, privileges, and access controls error within the __perf_event_init_context() and syscall_define5() functions in kernel/events/core.c. A local non-authenticated attacker can execute arbitrary code.

Mitigation

Install update from vendor's repository.

Vulnerable software versions

Linux kernel: All versions

External links

http://source.android.com/security/bulletin/2017-05-01
http://github.com/torvalds/linux/commit/c3c87e770458aa004bd7ed3f29945ff436fd6511
http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=c3c87e770458aa004bd7ed3f29945ff436fd6511
http://www.securityfocus.com/bid/98166

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.