{"id":"CVE-2020-7461","url":"https://www.cyber-defence.io/tools/cve/CVE-2020-7461","generatedAt":"2026-10-27T23:37:28.303Z","title":"In FreeBSD 12.1-STABLE before r365010, 11.4-STABLE before r365011, 12.1-RELEASE before p9, 11.4-RELEASE before p3, and 11.3-RELEASE before p13, dhclient(8) fails to handle certain malformed input related to handling of DHCP option 119 resulting a heap…","description":"In FreeBSD 12.1-STABLE before r365010, 11.4-STABLE before r365011, 12.1-RELEASE before p9, 11.4-RELEASE before p3, and 11.3-RELEASE before p13, dhclient(8) fails to handle certain malformed input related to handling of DHCP option 119 resulting a heap overflow. The heap overflow could in principle be exploited to achieve remote code execution. The affected process runs with reduced privileges in a Capsicum sandbox, limiting the immediate impact of an exploit.","published":"2021-03-26T21:15:13.000Z","lastModified":"2026-06-17T03:24:50.000Z","status":"Modified","sourceIdentifier":"secteam@freebsd.org","cvss":{"version":"3.1","score":7.3,"severity":"HIGH","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L"},"cwe":["CWE-787"],"affected":["freebsd/freebsd","siemens/simatic rf350m firmware","siemens/simatic rf650m firmware"],"epss":{"score":0.04126,"percentile":0.90746,"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":"high","text":"High impact if exploited, but EPSS currently rates exploitation as unlikely (4.13%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit."},"changes":[],"references":[{"url":"https://cert-portal.siemens.com/productcert/pdf/ssa-288459.pdf","tags":["Third Party Advisory"],"source":"secteam@freebsd.org"},{"url":"https://security.FreeBSD.org/advisories/FreeBSD-SA-20:26.dhclient.asc","tags":["Vendor Advisory"],"source":"secteam@freebsd.org"},{"url":"https://cert-portal.siemens.com/productcert/pdf/ssa-288459.pdf","tags":["Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://security.FreeBSD.org/advisories/FreeBSD-SA-20:26.dhclient.asc","tags":["Vendor Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2020-7461","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."}