{"id":"CVE-2020-7461","aliases":["EUVD-2020-28587","GHSA-x566-m9mc-f47w"],"status":"published","title":"In FreeBSD 12.1-STABLE before r365010, 11.4-STABLE before r365011, 12.1-RELEASE before p9, 11.4...","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.","severity":{"version":"3.1","score":7.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L","level":"high","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-08","score":0.04126,"percentile":0.90882,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":true,"fix_available":false},"cwes":["CWE-787"],"published":"2021-03-26T20:55:08Z","modified":"2026-06-17T03:24:49Z","exploits":[{"source":"pocgithub","id":"0xkol/freebsd-dhclient-poc","title":"0xkol/freebsd-dhclient-poc","date":"2022-11-30","url":"https://github.com/0xkol/freebsd-dhclient-poc"},{"source":"pocgithub","id":"knqyf263/CVE-2020-7461","title":"knqyf263/CVE-2020-7461","date":"2021-04-14","url":"https://github.com/knqyf263/CVE-2020-7461"}],"products":[{"vendor":"freebsd","product":"freebsd"},{"vendor":"siemens","product":"simatic_rf350m_firmware"},{"vendor":"siemens","product":"simatic_rf650m_firmware"}],"references":[{"url":"https://security.FreeBSD.org/advisories/FreeBSD-SA-20:26.dhclient.asc","tags":["x_refsource_MISC","x_transferred","Vendor Advisory"]},{"url":"https://cert-portal.siemens.com/productcert/pdf/ssa-288459.pdf","tags":["x_refsource_MISC","x_transferred","Third Party Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2020-7461"},{"url":"https://github.com/advisories/GHSA-x566-m9mc-f47w"}],"sources":{"cve":[{"id":"CVE-2020-7461","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.","status":"published","published":"2021-03-26T20:55:08Z","modified":"2024-08-04T09:25:49.113Z","updated_at":"2026-11-02T14:35:58.331892Z"}],"euvd":[{"id":"EUVD-2020-28587","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.","status":"published","published":"2021-03-26T20:55:08Z","modified":"2024-08-04T09:25:49Z","updated_at":"2026-11-03T03:08:00.054795Z"}],"ghsa":[{"id":"GHSA-x566-m9mc-f47w","title":"In FreeBSD 12.1-STABLE before r365010, 11.4-STABLE before r365011, 12.1-RELEASE before p9, 11.4...","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.","status":"published","published":"2022-05-24T17:45:30Z","modified":"2023-01-29T05:06:11Z","cwes":["CWE-787"],"updated_at":"2026-11-02T14:45:58.127346Z"}],"nvd":[{"id":"CVE-2020-7461","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.","status":"published","published":"2021-03-26T21:15:13.053Z","modified":"2026-06-17T03:24:49.54Z","cvss":[{"version":"3.1","score":7.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L","level":"high","assessor":"primary"},{"version":"2.0","score":7.5,"vector":"AV:N/AC:L/Au:N/C:P/I:P/A:P","level":"high","assessor":"primary"}],"cwes":["CWE-787"],"updated_at":"2026-11-02T14:06:37.687844Z"}]}}