Privilege escalation in Linux Kernel

1) Use-after-free

EUVDB-ID: #VU8816

Risk: Low

CVSSv3.1: 7.7 [CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2017-15265

CWE-ID: CWE-416 - Use After Free

Exploit availability: No

Description

The vulnerability allows a local attacker to gain elevated privileges on the target system.

The vulnerability exists due to use-after-free error in the ALSA sequencer interface (/dev/snd/seq). A local attacker can run a specially crafted application, trigger memory corruption and execute arbitrary code with root privileges.

Successful exploitation of the vulnerability may result in system compromise.

Mitigation

Install update from vendor's website.

Vulnerable software versions

Linux kernel: 4.10 - 4.13.6

External links

http://mailman.alsa-project.org/pipermail/alsa-devel/2017-October/126292.html

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.