Out-of-bounds read in Linux kernel - CVE-2018-13096

Vulnerability identifier: #VU13845

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-2018-13096

CWE-ID: CWE-125

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 in the build_sit_info() function in the Flash-Friendly File System (F2FS) component, as defined in the source code file fs/f2fs/super.c due to boundary error when mounting F2FS filesystems. A local attacker can access the system and mount an F2FS filesystem that submits malicious input in an abnormal bitmap size, trigger out-of-bounds memory read and cause the affected software to terminate abnormally.

Linux kernel
Ubuntu
Opensuse
linux (Ubuntu package)
linux-lts-xenial (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-raspi2 (Ubuntu package)
linux-oem (Ubuntu package)
linux-oracle (Ubuntu package)
linux-gke-4.15 (Ubuntu package)

Cybersecurity Help is currently unaware of any solutions addressing the vulnerability.

linux (Ubuntu package) - addressed in versions 4.4.0-139.165, 4.15.0-58.64
linux-lts-xenial (Ubuntu package) - update to 4.4.0-139.165~14.04.1
linux-kvm (Ubuntu package) - addressed in versions 4.4.0-1037.43, 4.15.0-1042.42
linux-aws (Ubuntu package) - addressed in versions 4.4.0-1034.37, 4.4.0-1072.82
linux-snapdragon (Ubuntu package) - addressed in versions 4.4.0-1104.109, 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-raspi2 (Ubuntu package) - update to 4.15.0-1043.46
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=200167

• Denial of service 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-aws, linux-lts-xenial