Out-of-bounds write in OpenWrt - CVE-2020-7248
Published: March 25, 2020
Vulnerability identifier: #VU26371
CSH Severity: High
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber
CVE-ID: CVE-2020-7248
CWE-ID: CWE-787
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: openwrt.org
Affected software:
OpenWrt
OpenWrt
Detailed vulnerability description
The vulnerability allows a remote attacker to compromise vulnerable system.
The vulnerability exists due to a boundary error when processing untrusted input in libubox library. A remote attacker can provide a specially crafted binary blob or JSON input to "blobmsg_format_json", trigger out-of-bounds write and execute arbitrary code on the target system.
How to mitigate CVE-2020-7248
Install updates from vendor's website.