CVE•Published 2022-02-04•1 article on news•7 live references•NVD data

CVE-2021-4154

Vulnerability data via CVEDB (Shodan)

CVSS v3.1

8.8

HIGH

EPSS percentile

Exploit Prediction Scoring System · top 35% of all CVEs

Description

A use-after-free flaw was found in cgroup1_parse_param in kernel/cgroup/cgroup-v1.c in the Linux kernel's cgroup v1 parser. A local attacker with a user privilege could cause a privilege escalation by exploiting the fsconfig syscall parameter leading to a container breakout and a denial of service on the system.

Timeline

Published 2022-02-04

External references

NVD MITRE Exploit-DB GitHub PoC Sploitus trickest/cve VulnCheck

Search for exposed instances

Shodan + Censys queries derived from NVD's CPE data. The vuln tag catches assets Shodan has explicitly linked to this CVE; the product / banner fingerprints find exposed instances even when the vuln tag was never applied (which is common).

Shodan · vuln tag0 hosts

vuln:CVE-2021-4154

Hosts Shodan has explicitly fingerprinted as vulnerable.

Shodan · product + version

product:"Netapp Hci Baseboard Management Controller" version:"h300e"

Version-pinned fingerprint from NVD's first vulnerable CPE.

Shodan · banner/body mention

http.html:"Hci Baseboard Management Controller"

HTTP body or banner mentions "Hci Baseboard Management Controller" — catches deploys Shodan didn't identify as a product.

More intel sources (5)

Shodan report

vuln:CVE-2021-4154