Use-after-free in Linux kernel

1) Use-after-free

EUVDB-ID: #VU30563

Risk: High

CVSSv4.0: 8.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber]

CVE-ID: CVE-2019-19525

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/net/ieee802154/atusb.c driver, aka CID-7fd25e6fc035. 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

Update to version 5.3.6.

Vulnerable software versions

Linux kernel: 5.3.1 - 5.3.5

CPE2.3

• cpe:2.3:o:linux_foundation:linux_kernel:5.3.1:*:*:*:*:*:*:*
• cpe:2.3:o:linux_foundation:linux_kernel:5.3.2:*:*:*:*:*:*:*
• cpe:2.3:o:linux_foundation:linux_kernel:5.3.3:*:*:*:*:*:*:*
• cpe:2.3:o:linux_foundation:linux_kernel:5.3.4:*:*:*:*:*:*:*
• cpe:2.3:o:linux_foundation:linux_kernel:5.3.5:*:*:*:*:*:*:*

External links

https://lists.opensuse.org/opensuse-security-announce/2019-12/msg00029.html
https://www.openwall.com/lists/oss-security/2019/12/03/4
https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.3.6
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=7fd25e6fc035f4b04b75bca6d7e8daa069603a76
https://lists.debian.org/debian-lts-announce/2020/03/msg00001.html

Q & A

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.