Vulnerability identifier: #VU23563

Vulnerability risk: Low

CVSSv3.1: 4.6 [CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2019-9500

CWE-ID: CWE-122

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 perform a denial of service (DoS) attack.

The vulnerability exists due to a boundary error in the "brcmf_wowl_nd_results()" function in "drivers/net/wireless/broadcom/brcm80211/brcmfmac/cfg80211.c" file. A remote attacker on the local network can trigger heap-based buffer overflow and cause a denial of service condition on the target system.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Linux kernel: 4.11 - 4.11.12, 4.12 - 4.12.14, 4.13 - 4.13.16, 4.14.0 - 4.14.122, 4.15.0 - 4.15.18, 4.16 - 4.16.18, 4.17 - 4.17.19, 4.18 - 4.18.20, 4.19 - 4.19.46

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External links
http://access.redhat.com/errata/RHSA-2019:4171

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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.