Divide-by-zero in Linux kernel - CVE-2018-13100

Vulnerability identifier: #VU13601

CSH Severity: Low

CVSS v4: 6.8 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]

CVE-ID: CVE-2018-13100

CWE-ID: CWE-369

Exploitation vector: Local access

Exploit availability: No public exploit available

The vulnerability allows a local attacker to cause DoS condition on the target system.

The vulnerability exists due to improper validation of secs_per_zone information in a corrupted Flash-Friendly File System (F2FS) image. A local attacker can mount a specially crafted F2FS image, trigger a divide-by-zero condition in the reset_curseg() function, as defined in the fs/f2fs/super.c source code file and cause the system to crash.

Linux kernel
Ubuntu
Opensuse
linux (Ubuntu package)
linux-raspi2 (Ubuntu package)
linux-kvm (Ubuntu package)
linux-aws (Ubuntu package)
linux-snapdragon (Ubuntu package)
linux-hwe (Ubuntu package)
linux-gcp (Ubuntu package)
linux-azure (Ubuntu package)
linux-oem (Ubuntu package)
linux-oracle (Ubuntu package)
linux-gke-4.15 (Ubuntu package)

Install update from vendor's website.

linux (Ubuntu package) - addressed in versions 3.13.0-218.269, 4.4.0-145.171, 4.15.0-58.64
linux-raspi2 (Ubuntu package) - addressed in versions 4.4.0-1106.114, 4.15.0-1043.46
linux-kvm (Ubuntu package) - addressed in versions 4.4.0-1043.49, 4.15.0-1042.42
linux-aws (Ubuntu package) - update to 4.4.0-1079.89
linux-snapdragon (Ubuntu package) - addressed in versions 4.4.0-1110.115, 4.15.0-1060.66
linux-hwe (Ubuntu package) - update to 4.15.0-58.64~16.04.1
linux-gcp (Ubuntu package) - addressed in versions 4.15.0-1040.42~16.04.1, 4.15.0-1040.42
linux-azure (Ubuntu package) - update to 4.15.0-1055.60
linux-oem (Ubuntu package) - update to 4.15.0-1050.57
linux-oracle (Ubuntu package) - addressed in versions 4.15.0-1021.23~16.04.1, 4.15.0-1021.23
linux-gke-4.15 (Ubuntu package) - update to 4.15.0-1040.42

• https://bugzilla.kernel.org/show_bug.cgi?id=200183

• Multiple vulnerabilities in Linux Kernel
• OpenSUSE Linux update for the Linux Kernel
• Ubuntu update for linux, linux-aws, linux-kvm and more
• Ubuntu update for linux, linux-azure, linux-gcp and more
• Ubuntu update for linux