CVE-2021-42377 — Free of Memory not on the Heap in Busybox
Severity
9.8CRITICALNVD
EPSS
2.9%
top 13.74%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
Timeline
PublishedNov 15
Latest updateJun 15
Description
An attacker-controlled pointer free in Busybox's hush applet leads to denial of service and possible code execution when processing a crafted shell command, due to the shell mishandling the &&& string. This may be used for remote code execution under rare conditions of filtered command input.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:HExploitability: 3.9 | Impact: 5.9
Affected Packages4 packages
Also affects: Fedora 33, 34
🔴Vulnerability Details
2GHSA▶
GHSA-phvg-gc27-gjwp: An attacker-controlled pointer free in Busybox's hush applet leads to denial of service and possible code execution when processing a crafted shell co↗2022-05-24
OSV▶
CVE-2021-42377: An attacker-controlled pointer free in Busybox's hush applet leads to denial of service and possible code execution when processing a crafted shell co↗2021-11-15