{"id":"CVE-2019-18634","aliases":["ALPINE-CVE-2019-18634","BELL-CVE-2019-18634","DEBIAN-CVE-2019-18634","DLA-2094-1","DSA-4614-1","EUVD-2019-8357","GHSA-rjv5-9w4p-4jrw","MGASA-2020-0081","RHSA-2020:0487","RHSA-2020:0509","RHSA-2020:0540","RHSA-2020:0726","SUSE-SU-2020:0390-1","SUSE-SU-2020:0406-1","SUSE-SU-2020:0407-1","SUSE-SU-2020:0408-1","SUSE-SU-2020:0409-1","UBUNTU-CVE-2019-18634","USN-4263-1","USN-4263-2","openSUSE-SU-2020:0244-1","openSUSE-SU-2024:11413-1"],"status":"published","title":"In Sudo through 1.8.29, if pwfeedback is enabled in /etc/sudoers, users can trigger a stack-based...","description":"In Sudo before 1.8.26, if pwfeedback is enabled in /etc/sudoers, users can trigger a stack-based buffer overflow in the privileged sudo process. (pwfeedback is a default setting in Linux Mint and elementary OS; however, it is NOT the default for upstream and many other packages, and would exist only if enabled by an administrator.) The attacker needs to deliver a long string to the stdin of getln() in tgetpass.c.","severity":{"version":"3.1","score":7.8,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-09","score":0.19276,"percentile":0.97359,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":true,"fix_available":true},"cwes":["CWE-787"],"published":"2020-01-29T17:23:26Z","modified":"2026-11-03T06:31:37Z","exploits":[{"source":"exploitdb","id":"EDB-47995","title":"Sudo 1.8.25p - 'pwfeedback' Buffer Overflow (PoC)","type":"dos","platform":"linux","date":"2020-02-04","url":"https://www.exploit-db.com/exploits/47995"},{"source":"exploitdb","id":"EDB-48052","title":"Sudo 1.8.25p - 'pwfeedback' Buffer 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Sudo before 1.8.26, if pwfeedback is enabled in /etc/sudoers, users can trigger a stack-based buffer overflow in the privileged sudo process. (pwfeedback is a default setting in Linux Mint and elementary OS; however, it is NOT the default for upstream and many other packages, and would exist only if enabled by an administrator.) The attacker needs to deliver a long string to the stdin of getln() in tgetpass.c.","status":"published","published":"2020-01-29T17:23:26Z","modified":"2024-08-05T01:54:14.581Z","updated_at":"2026-11-02T14:32:23.803059Z"}],"euvd":[{"id":"EUVD-2019-8357","description":"In Sudo before 1.8.26, if pwfeedback is enabled in /etc/sudoers, users can trigger a stack-based buffer overflow in the privileged sudo process. (pwfeedback is a default setting in Linux Mint and elementary OS; however, it is NOT the default for upstream and many other packages, and would exist only if enabled by an administrator.) The attacker needs to deliver a long string to the stdin of getln() in tgetpass.c.","status":"published","published":"2020-01-29T17:23:26Z","modified":"2024-08-05T01:54:14Z","updated_at":"2026-11-03T02:40:27.733219Z"}],"ghsa":[{"id":"GHSA-rjv5-9w4p-4jrw","title":"In Sudo through 1.8.29, if pwfeedback is enabled in /etc/sudoers, users can trigger a stack-based...","description":"In Sudo through 1.8.29, if pwfeedback is enabled in /etc/sudoers, users can trigger a stack-based buffer overflow in the privileged sudo process. (pwfeedback is a default setting in Linux Mint and elementary OS; however, it is NOT the default for upstream and many other packages, and would exist only if enabled by an administrator.) The attacker needs to deliver a long string to the stdin of getln() in tgetpass.c.","status":"published","published":"2022-05-24T17:07:39Z","modified":"2023-01-29T05:01:16Z","updated_at":"2026-11-02T14:44:46.468507Z"}],"nvd":[{"id":"CVE-2019-18634","description":"In Sudo before 1.8.26, if pwfeedback is enabled in /etc/sudoers, users can trigger a stack-based buffer overflow in the privileged sudo process. (pwfeedback is a default setting in Linux Mint and elementary OS; however, it is NOT the default for upstream and many other packages, and would exist only if enabled by an administrator.) The attacker needs to deliver a long string to the stdin of getln() in tgetpass.c.","status":"published","published":"2020-01-29T18:15:12.247Z","modified":"2026-06-17T02:25:11.983Z","cvss":[{"version":"3.1","score":7.8,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high","assessor":"primary"},{"version":"2.0","score":4.6,"vector":"AV:L/AC:L/Au:N/C:P/I:P/A:P","level":"medium","assessor":"primary"}],"cwes":["CWE-787"],"updated_at":"2026-11-02T14:05:43.875329Z"}],"osv":[{"id":"ALPINE-CVE-2019-18634","description":"In Sudo before 1.8.26, if pwfeedback is enabled in /etc/sudoers, users can trigger a stack-based buffer overflow in the privileged sudo process. (pwfeedback is a default setting in Linux Mint and elementary OS; however, it is NOT the default for upstream and many other packages, and would exist only if enabled by an administrator.) The attacker needs to deliver a long string to the stdin of getln() in tgetpass.c.","status":"published","published":"2020-01-29T18:15:12.247Z","modified":"2026-11-03T06:31:37.880180126Z","cvss":[{"version":"3.1","score":7.8,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high"}],"updated_at":"2026-11-03T07:18:23.800469Z"},{"id":"BELL-CVE-2019-18634","title":"CVE-2019-18634 does not affect BellSoft software","status":"withdrawn","published":"2023-08-31T12:14:59.726291Z","modified":"2026-01-26T09:49:35.277171Z","cvss":[{"version":"3.1","score":7.8,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high"}],"updated_at":"2026-11-02T15:28:15.340685Z"},{"id":"CVE-2019-18634","description":"In Sudo before 1.8.26, if pwfeedback is enabled in /etc/sudoers, users can trigger a stack-based buffer overflow in the privileged sudo process. (pwfeedback is a default setting in Linux Mint and elementary OS; however, it is NOT the default for upstream and many other packages, and would exist only if enabled by an administrator.) The attacker needs to deliver a long string to the stdin of getln() in tgetpass.c.","status":"published","published":"2020-01-29T18:15:12.247Z","modified":"2026-10-24T10:30:55.728884828Z","cvss":[{"version":"3.1","score":7.8,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high"}],"updated_at":"2026-11-02T15:44:11.673963Z"},{"id":"DEBIAN-CVE-2019-18634","description":"In Sudo before 1.8.26, if pwfeedback is enabled in /etc/sudoers, users can trigger a stack-based buffer overflow in the privileged sudo process. (pwfeedback is a default setting in Linux Mint and elementary OS; however, it is NOT the default for upstream and many other packages, and would exist only if enabled by an administrator.) The attacker needs to deliver a long string to the stdin of getln() in tgetpass.c.","status":"published","published":"2020-01-29T18:15:12.247Z","modified":"2026-09-21T07:02:34.203918249Z","cvss":[{"version":"3.1","score":7.8,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high"}],"updated_at":"2026-11-02T15:45:31.867036Z"},{"id":"RHSA-2020:0487","title":"Red Hat Security Advisory: sudo security update","status":"published","published":"2024-09-16T03:30:29Z","modified":"2025-11-22T11:55:18Z","cvss":[{"version":"3.1","score":7.8,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high"}],"updated_at":"2026-11-02T15:53:06.535721Z"},{"id":"RHSA-2020:0509","title":"Red Hat Security Advisory: sudo security update","status":"published","published":"2024-09-16T03:30:37Z","modified":"2025-11-22T11:55:20Z","cvss":[{"version":"3.1","score":7.8,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high"}],"updated_at":"2026-11-02T15:53:06.535721Z"},{"id":"RHSA-2020:0540","title":"Red Hat Security Advisory: sudo security update","status":"published","published":"2024-09-16T03:30:45Z","modified":"2026-06-26T10:46:09Z","cvss":[{"version":"3.1","score":7.8,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high"}],"updated_at":"2026-11-02T15:53:06.535721Z"},{"id":"RHSA-2020:0726","title":"Red Hat Security Advisory: sudo security update","status":"published","published":"2024-09-16T03:30:53Z","modified":"2026-06-26T10:46:27Z","cvss":[{"version":"3.1","score":7.8,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high"}],"updated_at":"2026-11-02T15:53:06.535721Z"},{"id":"UBUNTU-CVE-2019-18634","description":"In Sudo before 1.8.26, if pwfeedback is enabled in /etc/sudoers, users can trigger a stack-based buffer overflow in the privileged sudo process. (pwfeedback is a default setting in Linux Mint and elementary OS; however, it is NOT the default for upstream and many other packages, and would exist only if enabled by an administrator.) The attacker needs to deliver a long string to the stdin of getln() in tgetpass.c.","status":"published","published":"2020-01-31T00:00:00Z","modified":"2026-02-04T02:30:00.544336Z","cvss":[{"version":"3.1","score":7.8,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high"}],"updated_at":"2026-11-02T15:54:20.325378Z"},{"id":"DLA-2094-1","title":"sudo - security update","status":"published","published":"2020-02-01T00:00:00Z","modified":"2026-03-09T01:18:35.327995Z","updated_at":"2026-11-02T15:46:10.227108Z"},{"id":"DSA-4614-1","title":"sudo - security update","status":"published","published":"2020-02-01T00:00:00Z","modified":"2026-03-09T02:08:55.084658Z","updated_at":"2026-11-02T15:46:17.19998Z"},{"id":"MGASA-2020-0081","title":"Updated sudo packages fix security vulnerability","description":"The updated packages fix a security vulnerability:\n\nIn Sudo before 1.8.31, if pwfeedback is enabled in /etc/sudoers, users can\ntrigger a stack-based buffer overflow in the privileged sudo process.\n(pwfeedback is a default setting in Linux Mint and elementary OS; however,\nit is NOT the default for upstream and many other packages, and would exist\nonly if enabled by an administrator.) The attacker needs to deliver a long\nstring to the stdin of getln() in tgetpass.c. (CVE-2019-18634)\n","status":"published","published":"2020-02-09T19:13:40Z","modified":"2026-04-16T04:41:13.213842082Z","updated_at":"2026-11-02T15:49:41.151324Z"},{"id":"openSUSE-SU-2020:0244-1","title":"Security update for sudo","description":"This update for sudo fixes the following issues:\n\nSecurity issue fixed:\n\n- CVE-2019-18634: Fixed a buffer overflow in the passphrase prompt that could occur when pwfeedback was enabled in /etc/sudoers (bsc#1162202).\n\nNon-security issue fixed:\n\n- Fixed an issue where sudo -l would ask for a password even though `listpw` was set to `never` (bsc#1162675).\n\nThis update was imported from the SUSE:SLE-15:Update update project.","status":"published","published":"2020-02-25T09:29:12Z","modified":"2026-02-04T03:16:59.752721Z","updated_at":"2026-11-02T16:58:31.152112Z"},{"id":"openSUSE-SU-2024:11413-1","title":"sudo-1.9.7p2-1.4 on GA media","description":"These are all security issues fixed in the sudo-1.9.7p2-1.4 package on the GA media of openSUSE Tumbleweed.","status":"published","published":"2024-06-15T00:00:00Z","modified":"2026-02-04T02:46:24.949279Z","updated_at":"2026-11-02T16:58:35.195147Z"},{"id":"SUSE-SU-2020:0390-1","title":"Security update for sudo","description":"This update for sudo fixes the following issue:\n\nSecurity issue fixed:\n\n- CVE-2019-18634: Fixed a buffer overflow in the passphrase prompt that could occur when pwfeedback was enabled in /etc/sudoers (bsc#1162202).\n","status":"published","published":"2020-02-18T08:23:10Z","modified":"2026-02-04T03:31:41.71084Z","updated_at":"2026-11-02T15:53:47.06185Z"},{"id":"SUSE-SU-2020:0406-1","title":"Security update for sudo","description":"This update for sudo fixes the following issues:\n\nSecurity issue fixed:\n\n- CVE-2019-18634: Fixed a buffer overflow in the passphrase prompt that could occur when pwfeedback was enabled in /etc/sudoers (bsc#1162202).\n\nNon-security issue fixed:\n\n- Fixed an issue where sudo -l would ask for a password even though `listpw` was set to `never` (bsc#1162675).\n","status":"published","published":"2020-02-19T08:31:33Z","modified":"2026-02-04T02:32:39.83713Z","updated_at":"2026-11-02T15:53:47.06185Z"},{"id":"SUSE-SU-2020:0407-1","title":"Security update for sudo","description":"This update for sudo fixes the following issue:\n\nSecurity issue fixed:\n\n- CVE-2019-18634: Fixed a buffer overflow in the passphrase prompt that could occur when pwfeedback was enabled in /etc/sudoers (bsc#1162202).\n","status":"published","published":"2020-02-19T08:31:56Z","modified":"2026-02-04T04:09:19.282428Z","updated_at":"2026-11-02T15:53:47.06185Z"},{"id":"SUSE-SU-2020:0408-1","title":"Security update for sudo","description":"This update for sudo fixes the following issues:\n\nSecurity issue fixed:\n\n- CVE-2019-18634: Fixed a buffer overflow in the passphrase prompt that could occur when pwfeedback was enabled in /etc/sudoers (bsc#1162202).\n\nNon-security issue fixed:\n\n- Fixed an issue where sudo -l would ask for a password even though `listpw` was set to `never` (bsc#1162675).\n","status":"published","published":"2020-02-19T08:33:13Z","modified":"2026-02-04T03:24:06.356551Z","updated_at":"2026-11-02T15:53:47.06185Z"},{"id":"SUSE-SU-2020:0409-1","title":"Security update for sudo","description":"This update for sudo fixes the following issues:\n\nSecurity issue fixed:\n\n- CVE-2019-18634: Fixed a buffer overflow in the passphrase prompt that could occur when pwfeedback was enabled in /etc/sudoers (bsc#1162202).\n\nNon-security issue fixed:\n\n- Fixed an issue where sudo -l would ask for a password even though `listpw` was set to `never` (bsc#1162675).\n","status":"published","published":"2020-02-19T08:33:33Z","modified":"2026-02-04T02:49:18.501026Z","updated_at":"2026-11-02T15:53:47.06185Z"},{"id":"USN-4263-1","title":"sudo vulnerability","description":"Joe Vennix discovered that Sudo incorrectly handled memory operations when\nthe pwfeedback option is enabled. A local attacker could possibly use this\nissue to obtain unintended access to the administrator account.\n","status":"published","published":"2020-02-03T13:19:16Z","modified":"2026-02-10T04:41:46Z","updated_at":"2026-11-02T16:58:14.547547Z"},{"id":"USN-4263-2","title":"sudo vulnerability","description":"USN-4263-1 fixed a vulnerability in Sudo. This update provides\nthe corresponding update for Ubuntu 12.04 ESM and Ubuntu 14.04 ESM.\n\nOriginal advisory details:\n\n Joe Vennix discovered that Sudo incorrectly handled memory operations when\n the pwfeedback option is enabled. A local attacker could possibly use this\n issue to obtain unintended access to the administrator account.\n","status":"published","published":"2020-02-05T13:10:13Z","modified":"2026-02-10T04:41:46Z","updated_at":"2026-11-02T16:58:14.547547Z"}]}}