{"id":"CVE-2017-13649","aliases":["EUVD-2017-5166","GHSA-p387-c589-x473"],"status":"published","title":"UnrealIRCd 4.0.13 and earlier creates a PID file after dropping privileges to a non-root account,...","description":"UnrealIRCd 4.0.13 and earlier creates a PID file after dropping privileges to a non-root account, which might allow local users to kill arbitrary processes by leveraging access to this non-root account for PID file modification before a root script executes a \"kill `cat /pathname`\" command. NOTE: the vendor indicates that there is no common or recommended scenario in which a root script would execute this kill command.","severity":{"version":"3.0","score":5.5,"vector":"CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","level":"medium","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-07","score":0.00284,"percentile":0.21053,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-665"],"published":"2017-08-23T21:00:00Z","modified":"2026-06-17T01:04:56Z","products":[{"vendor":"unrealircd","product":"unrealircd"}],"references":[{"url":"https://bugs.unrealircd.org/view.php?id=4990","tags":["x_refsource_MISC","x_transferred","Issue Tracking","Third Party Advisory"]},{"url":"http://www.securityfocus.com/bid/100507","tags":["vdb-entry","x_refsource_BID","x_transferred","Third Party Advisory","VDB Entry"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2017-13649"},{"url":"https://github.com/advisories/GHSA-p387-c589-x473"}],"sources":{"cve":[{"id":"CVE-2017-13649","description":"UnrealIRCd 4.0.13 and earlier creates a PID file after dropping privileges to a non-root account, which might allow local users to kill arbitrary processes by leveraging access to this non-root account for PID file modification before a root script executes a \"kill `cat /pathname`\" command. NOTE: the vendor indicates that there is no common or recommended scenario in which a root script would execute this kill command.","status":"published","published":"2017-08-23T21:00:00Z","modified":"2024-08-05T19:05:18.955Z","updated_at":"2026-11-02T14:33:17.903346Z"}],"euvd":[{"id":"EUVD-2017-5166","description":"UnrealIRCd 4.0.13 and earlier creates a PID file after dropping privileges to a non-root account, which might allow local users to kill arbitrary processes by leveraging access to this non-root account for PID file modification before a root script executes a \"kill `cat /pathname`\" command. NOTE: the vendor indicates that there is no common or recommended scenario in which a root script would execute this kill command.","status":"published","published":"2017-08-23T21:00:00Z","modified":"2024-08-05T19:05:18Z","updated_at":"2026-11-03T02:23:19.724201Z"}],"ghsa":[{"id":"GHSA-p387-c589-x473","title":"UnrealIRCd 4.0.13 and earlier creates a PID file after dropping privileges to a non-root account,...","description":"UnrealIRCd 4.0.13 and earlier creates a PID file after dropping privileges to a non-root account, which might allow local users to kill arbitrary processes by leveraging access to this non-root account for PID file modification before a root script executes a \"kill `cat /pathname`\" command. NOTE: the vendor indicates that there is no common or recommended scenario in which a root script would execute this kill command.","status":"published","published":"2022-05-13T01:43:11Z","modified":"2023-02-02T05:00:54Z","cvss":[{"version":"3.0","score":5.5,"vector":"CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","level":"medium"}],"cwes":["CWE-665"],"updated_at":"2026-11-02T14:51:04.373532Z"}],"nvd":[{"id":"CVE-2017-13649","description":"UnrealIRCd 4.0.13 and earlier creates a PID file after dropping privileges to a non-root account, which might allow local users to kill arbitrary processes by leveraging access to this non-root account for PID file modification before a root script executes a \"kill `cat /pathname`\" command. NOTE: the vendor indicates that there is no common or recommended scenario in which a root script would execute this kill command.","status":"published","published":"2017-08-23T21:29:00.28Z","modified":"2026-06-17T01:04:56.157Z","cvss":[{"version":"3.0","score":5.5,"vector":"CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","level":"medium","assessor":"primary"},{"version":"2.0","score":2.1,"vector":"AV:L/AC:L/Au:N/C:N/I:N/A:P","level":"low","assessor":"primary"}],"cwes":["CWE-665"],"updated_at":"2026-11-02T14:03:57.82609Z"}]}}