Buffer overflow in Linux kernel - CVE-2019-17133

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Main Vulnerability Database Vulnerabilities #VU22312

Buffer overflow in Linux kernel - CVE-2019-17133

Published: October 28, 2019 / Updated: March 23, 2020


Vulnerability identifier: #VU22312
CSH Severity: Medium
CVSS v4: 7.7 [CVSS:4.0/AV:A/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2019-17133
CWE-ID: CWE-119
Exploitation vector: Adjecent network
Exploit availability: No public exploit available

Vulnerability details

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

The vulnerability exists due to a boundary error within the cfg80211_mgd_wext_giwessid function in net/wireless/wext-sme.c in Linux kernel, because the affected component does not reject a long SSID IE. A remote attacker on the local wireless network can trigger memory corruption and execute arbitrary code on the target system.

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


Affected software

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

kernel (Red Hat package)
kernel-rt (Red Hat package)
linux-4.4.199/kernel-generic
linux-4.4.199/kernel-huge
linux-4.4.199/kernel-modules
linux-4.4.199/kernel-headers
kernel-alt (Red Hat package)
Red Hat Virtualization Host
Juniper Junos Space

How to mitigate CVE-2019-17133

Install update from vendor's website.

Linux kernel - update to 5.3.3
kernel (Red Hat package) - addressed in versions 2.6.32-754.28.1.el6, 3.10.0-327.85.1.el7, 3.10.0-514.73.1.el7, 3.10.0-957.46.1.el7, 3.10.0-1062.12.1.el7
kernel-rt (Red Hat package) - update to 3.10.0-1062.12.1.rt56.1042.el7
linux-4.4.199/kernel-generic - update to 4.4.199
linux-4.4.199/kernel-huge - update to 4.4.199
linux-4.4.199/kernel-modules - update to 4.4.199
linux-4.4.199/kernel-headers - update to 4.4.199_smp
kernel-alt (Red Hat package) - update to 4.14.0-115.17.1.el7a
Juniper Junos Space - update to 20.3R1

External References

Related Security Bulletins