Use-after-free in Linux kernel

1) Use-after-free

EUVDB-ID: #VU24171

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-2019-19524

CWE-ID: CWE-416 - Use After Free

Exploit availability: No

Description

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

The vulnerability exists due to use-after-free error in the drivers/input/ff-memless.c driver. A local user can use a malicious USB device to trigger use-after-free error and execute arbitrary code on the system with elevated privileges.

Mitigation

Install update from vendor's website.

Vulnerable software versions

Linux kernel: 5.3.1 - 5.3.11

External links

http://lists.opensuse.org/opensuse-security-announce/2019-12/msg00029.html
http://www.openwall.com/lists/oss-security/2019/12/03/4
http://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.3.12
http://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=fa3a5a1880c91bb92594ad42dfe9eedad7996b86
http://seclists.org/bugtraq/2020/Jan/10
http://usn.ubuntu.com/4225-1/
http://usn.ubuntu.com/4226-1/
http://usn.ubuntu.com/4227-1/
http://usn.ubuntu.com/4227-2/
http://usn.ubuntu.com/4228-1/
http://usn.ubuntu.com/4228-2/

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.