Remote code execution in Realtek (RTLWIFI) driver in Linux kernel

1) Buffer overflow

EUVDB-ID: #VU22595

Risk: Medium

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

CVE-ID: CVE-2019-17666

CWE-ID: CWE-119 - Memory corruption

Exploit availability: No

Description

The vulnerability allows a remote attacker to execute arbitrary code on the target system.

The vulnerability exists due to a boundary error within the P2P (Wifi-Direct) functionality in rtl_p2p_noa_ie() function in drivers/net/wireless/realtek/rtlwifi/ps.c in Linux kernel when processing Notice and Absence frames. A remote attacker can send specially crafted data via the wireless network, trigger memory corruption and execute arbitrary code on the target system.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Linux kernel: 4.4.0 - 5.3.8

External links

http://lists.opensuse.org/opensuse-security-announce/2019-10/msg00064.html
http://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/TRBP4O6D2SQ2NHCRHTJONGCZLWOIV5MN/
http://lkml.org/lkml/2019/10/16/1226
http://twitter.com/nicowaisman/status/1184864519316758535
http://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=8c55dedb795be8ec0cf488...

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the local network (LAN).

Is there known malware, which exploits this vulnerability?

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