Infinite loop in Linux kernel - CVE-2018-10938
Published: August 27, 2018 / Updated: August 28, 2018
Vulnerability identifier: #VU14536
CSH Severity: Medium
CVSS v4: 8.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2018-10938
CWE-ID: CWE-835
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to an error when processing network packets within the cipso_v4_optptr() function in net/ipv4/cipso_ipv4.c. A remote unauthenticated attacker can send a specially crafted packet to the affected system, force the Linux kernel enter an infinite loop and cause denial of service.
Affected software
Linux kernel
Ubuntu
linux (Ubuntu package)
linux-aws (Ubuntu package)
linux-kvm (Ubuntu package)
linux-snapdragon (Ubuntu package)
Ubuntu
linux (Ubuntu package)
linux-aws (Ubuntu package)
linux-kvm (Ubuntu package)
linux-snapdragon (Ubuntu package)
How to mitigate CVE-2018-10938
Install update from vendor's GIT repository:
linux (Ubuntu package) - update to 4.4.0-138.164
linux-aws (Ubuntu package) - update to 4.4.0-1070.80
linux-kvm (Ubuntu package) - update to 4.4.0-1036.42
linux-snapdragon (Ubuntu package) - update to 4.4.0-1103.108
linux-aws (Ubuntu package) - update to 4.4.0-1070.80
linux-kvm (Ubuntu package) - update to 4.4.0-1036.42
linux-snapdragon (Ubuntu package) - update to 4.4.0-1103.108