#VU11524 Out-of-bounds read in Linux kernel - CVE-2018-1093
Published: April 4, 2018
Vulnerability identifier: #VU11524
Vulnerability risk: Low
CVSSv4.0: 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/E:U/U:Clear
CVE-ID: CVE-2018-1093
CWE-ID: CWE-125
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerable software:
Linux kernel
Linux kernel
Software vendor:
Linux Foundation
Linux Foundation
Description
The vulnerability allows a local attacker to cause DoS condition on the target system.
The weakness exists due to improper validation of bitmap block numbers by the balloc.c and ialloc.c source codes. A local attacker can mount a customized ext4 image, trigger out-of-bounds read in the ext4/balloc.c:ext4_valid_block_bitmap() function ans cause the service to crash.
The weakness exists due to improper validation of bitmap block numbers by the balloc.c and ialloc.c source codes. A local attacker can mount a customized ext4 image, trigger out-of-bounds read in the ext4/balloc.c:ext4_valid_block_bitmap() function ans cause the service to crash.
Remediation
Install update from vendor's website.