{"id":"CVE-2020-2031","url":"https://www.cyber-defence.io/tools/cve/CVE-2020-2031","generatedAt":"2026-10-27T22:33:26.596Z","title":"An integer underflow vulnerability in the dnsproxyd component of the PAN-OS management interface allows authenticated administrators to issue a command from the command line interface that causes the component to stop responding.","description":"An integer underflow vulnerability in the dnsproxyd component of the PAN-OS management interface allows authenticated administrators to issue a command from the command line interface that causes the component to stop responding. Repeated attempts to send this request result in denial of service to all PAN-OS services by restarting the device and putting it into maintenance mode. This issue impacts: PAN-OS 9.1 versions earlier than PAN-OS 9.1.3. This issue does not impact PAN-OS 8.1, PAN-OS 9.0, or Prisma Access services.","published":"2020-07-08T17:15:10.000Z","lastModified":"2026-06-17T03:11:41.000Z","status":"Modified","sourceIdentifier":"psirt@paloaltonetworks.com","cvss":{"version":"3.1","score":4.9,"severity":"MEDIUM","vector":"CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H"},"cwe":["CWE-191"],"affected":["paloaltonetworks/pan-os"],"epss":{"score":0.01135,"percentile":0.66276,"date":"2026-10-26","history":[]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"low","text":"Lower severity and a low EPSS score (1.14%). Track it; it rarely justifies an emergency change on its own."},"changes":[],"references":[{"url":"https://security.paloaltonetworks.com/CVE-2020-2031","tags":["Vendor Advisory"],"source":"psirt@paloaltonetworks.com"},{"url":"https://security.paloaltonetworks.com/CVE-2020-2031","tags":["Vendor Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2020-2031","epss":"https://www.first.org/epss/","kev":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","exploitdb":"https://www.exploit-db.com/"},"licence":"CC BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}