Heap-based buffer overflow in Linux kernel - CVE-2019-9500

Vulnerability identifier: #VU23563

CSH Severity: Low

CVSS v4: 6 [CVSS:4.0/AV:A/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]

CVE-ID: CVE-2019-9500

CWE-ID: CWE-122

Exploitation vector: Adjecent network

Exploit availability: No public exploit available

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.

Linux kernel
Red Hat Enterprise Linux for IBM System z (Structure A)
Red Hat Enterprise Linux Server
Red Hat Enterprise Linux for Power 9
Red Hat Enterprise Linux for ARM 64
Red Hat Enterprise Linux Workstation
Red Hat Enterprise Linux Desktop
Red Hat Enterprise Linux for IBM z Systems
Red Hat Enterprise Linux for Real Time for NFV
Red Hat Enterprise Linux for Power, big endian
Red Hat Enterprise Linux for Real Time
Red Hat Enterprise Linux for Scientific Computing
Red Hat Enterprise Linux for Power, little endian
Red Hat Enterprise Linux Server - AUS
Red Hat Enterprise Linux for x86_64 - Extended Update Support
Red Hat Enterprise Linux for x86_64
Red Hat Enterprise Linux for IBM z Systems - Extended Update Support
Red Hat Enterprise Linux for Power, big endian - Extended Update Support
Red Hat Enterprise Linux EUS Compute Node
Red Hat Enterprise Linux for Power, little endian - Extended Update Support
Red Hat Enterprise Linux Server - TUS
Red Hat Virtualization Host - Extended Update Support 4.2 for RHEL
Red Hat Enterprise Linux for Power
Red Hat Enterprise Linux Server - Extended Update Support
Fedora
Red Hat Virtualization Host
kernel (Red Hat package)
kernel-rt (Red Hat package)
kernel-alt (Red Hat package)
kernel
kernel-headers
kernel-tools

Install updates from vendor's website.

Linux kernel - addressed in versions 4.14.123, 4.19.47
kernel (Red Hat package) - addressed in versions 3.10.0-957.41.1.el7, 3.10.0-1062.1.1.el7
kernel-rt (Red Hat package) - update to 3.10.0-1062.1.1.rt56.1024.el7
kernel-alt (Red Hat package) - update to 4.14.0-115.14.1.el7a
kernel - addressed in versions 5.0.9-100.fc28, 5.0.9-200.fc29, 5.0.9-301.fc30
kernel-headers - addressed in versions 5.0.9-100.fc28, 5.0.9-200.fc29, 5.0.9-300.fc30
kernel-tools - addressed in versions 5.0.9-100.fc28, 5.0.9-200.fc29, 5.0.9-300.fc30

• https://access.redhat.com/errata/RHSA-2019:4171

• Denial of service in Linux Kernel
• Red Hat update for kpatch-patch
• Red Hat Enterprise Linux 7 update for kernel
• Red Hat Enterprise Linux 7 update for kernel-rt
• Red Hat Enterprise Linux 7 update for kernel-alt
• Red Hat Enterprise Linux 7.6 Extended Update Support update for kernel
• Fedora 30 update for kernel, kernel-headers, kernel-tools
• Fedora 29 update for kernel, kernel-headers, kernel-tools
• Fedora 28 update for kernel, kernel-headers, kernel-tools