CVE•Published 2021-05-05•1 article on news•6 live references•NVD data
CVE-2021-31800
Vulnerability data via CVEDB (Shodan)
CVSS v3.1
9.8
CRITICAL
EPSS percentile
97
Exploit Prediction Scoring System · top 3% of all CVEs
Description
Multiple path traversal vulnerabilities exist in smbserver.py in Impacket through 0.9.22. An attacker that connects to a running smbserver instance can list and write to arbitrary files via ../ directory traversal. This could potentially be abused to achieve arbitrary code execution by replacing /etc/shadow or an SSH authorized key.
Timeline
Published 2021-05-05
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-2021-31800Hosts Shodan has explicitly fingerprinted as vulnerable.
Shodan · product
product:"Secureauth Impacket"All exposed Secureauth Impacket instances — cross-reference with the CVE's affected-version range.
Shodan · banner/body mention
http.html:"Impacket"HTTP body or banner mentions "Impacket" — catches deploys Shodan didn't identify as a product.
More intel sources (5)
Shodan report
vuln:CVE-2021-31800Country / ASN / product breakdown for the vuln query.
Censys
vulnerabilities.cve_id: CVE-2021-31800Censys host search filtered to this CVE id.
grep.app
CVE-2021-31800Public source-code mentions — fast PoC discovery.
GitHub code
CVE-2021-31800GitHub code search for direct mentions.
Google dork
"CVE-2021-31800" exploit -site:nvd.nist.govWrite-ups and news, NVD excluded.