CVE•Published 2020-11-11•2 articles on news•6 live references•NVD data

CVE-2020-17049

Vulnerability data via CVEDB (Shodan)

CVSS v3.1

6.6

MEDIUM

EPSS percentile

Exploit Prediction Scoring System · top 4% of all CVEs

Description

A security feature bypass vulnerability exists in the way Key Distribution Center (KDC) determines if a service ticket can be used for delegation via Kerberos Constrained Delegation (KCD). To exploit the vulnerability, a compromised service that is configured to use KCD could tamper with a service ticket that is not valid for delegation to force the KDC to accept it. The update addresses this vulnerability by changing how the KDC validates service tickets used with KCD.

Timeline

Published 2020-11-11

External references

NVD MITRE Exploit-DB GitHub PoC 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-2020-17049

Hosts Shodan has explicitly fingerprinted as vulnerable.

Shodan · product + version

product:"Samba Samba" version:"4.1.0"

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

Shodan · banner/body mention

http.html:"Samba"

HTTP body or banner mentions "Samba" — catches deploys Shodan didn't identify as a product.

More intel sources (5)

Shodan report

vuln:CVE-2020-17049