CVE•Published 2021-07-07•4 articles on news•7 live references•NVD data
CVE-2021-22555
Vulnerability data via CVEDB (Shodan)
CVSS v3.1
8.3
HIGH
EPSS percentile
100
Exploit Prediction Scoring System · top 0% of all CVEs
Description
A heap out-of-bounds write affecting Linux since v2.6.19-rc1 was discovered in net/netfilter/x_tables.c. This allows an attacker to gain privileges or cause a DoS (via heap memory corruption) through user name space
Timeline
Published 2021-07-07
External references
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-2021-22555Hosts Shodan has explicitly fingerprinted as vulnerable.
Shodan · product
product:"Netapp Cloud Backup"All exposed Netapp Cloud Backup instances — cross-reference with the CVE's affected-version range.
Shodan · banner/body mention
http.html:"Cloud Backup"HTTP body or banner mentions "Cloud Backup" — catches deploys Shodan didn't identify as a product.
More intel sources (5)
Shodan report
vuln:CVE-2021-22555Country / ASN / product breakdown for the vuln query.
Censys
vulnerabilities.cve_id: CVE-2021-22555Censys host search filtered to this CVE id.
grep.app
CVE-2021-22555Public source-code mentions — fast PoC discovery.
GitHub code
CVE-2021-22555GitHub code search for direct mentions.
Google dork
"CVE-2021-22555" exploit -site:nvd.nist.govWrite-ups and news, NVD excluded.
Known PoCs on GitHub (7)
CVE-2021-225557 repos
Mr-xn/Penetration_Testing_POCHTML
渗透测试有关的POC、EXP、脚本、提权、小工具等---About penetration-testing python-script poc getshell csrf xss cms php-getshell domainmod-xss csrf-webshell cobub-razor cve rce sql sql-poc poc-exp bypas…
xairy/linux-kernel-exploitationunknown
A collection of links related to Linux kernel security and exploitation
0xor0ne/awesome-listunknown
Cybersecurity oriented awesome list
Metarget/metargetPython
Metarget is a framework providing automatic constructions of vulnerable infrastructures.
bsauce/kernel-exploit-factoryC
Linux kernel CVE exploit analysis report and relative debug environment. You don't need to compile Linux kernel and configure your environment anymore.
bsauce/kernel-security-learningC
Anything about kernel security. CTF kernel pwn, kernel exploit, kernel fuzz and kernel defense paper, kernel debugging technique, kernel CVE debug.
bytedance/vArmorGo
vArmor is a cloud-native container hardening system that leverages AppArmor/BPF/Seccomp and network proxy technologies to enforce access control from system calls to application pr…