#VU51741 Improper Handling of Exceptional Conditions in BusyBox - CVE-2021-28831
Published: March 26, 2021 / Updated: February 9, 2022
Vulnerability identifier: #VU51741
Vulnerability risk: Medium
CVSSv4.0: 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/E:U/U:Green
CVE-ID: CVE-2021-28831
CWE-ID: CWE-755
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerable software:
BusyBox
BusyBox
Software vendor:
busybox.net
busybox.net
Description
The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to improper handling of error bit on the huft_build result pointer in decompress_gunzip.c. A remote attacker can pass malformed gzip data to the application, trigger an invalid free and perform a denial of service (DoS) attack.
Remediation
Install update from vendor's website.