#VU22595 Buffer overflow in Linux kernel - CVE-2019-17666

Vulnerability identifier: #VU22595

Vulnerability risk: Medium

CVSSv4.0: 6.3 [CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2019-17666

CWE-ID: CWE-119

Exploitation vector: Local network

Exploit availability: No

Vulnerable software:
Linux kernel
Operating systems & Components / Operating system

Vendor: Linux Foundation

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 - 4.4.198, 4.9 - 4.9.198, 4.14.0 rc1 - 4.19.81, 5.3 - 5.3.8

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

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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.