{"id":"CVE-2009-4128","aliases":["DEBIAN-CVE-2009-4128","EUVD-2009-4098","GHSA-prgr-9xf7-v9fw"],"status":"published","title":"GNU GRand Unified Bootloader (GRUB) 2 1.97 only compares the submitted portion of a password with...","description":"GNU GRand Unified Bootloader (GRUB) 2 1.97 only compares the submitted portion of a password with the actual password, which makes it easier for physically proximate attackers to conduct brute force attacks and bypass authentication by submitting a password whose length is 1.","severity":{"version":"2.0","score":7.2,"vector":"AV:L/AC:L/Au:N/C:C/I:C/A:C","level":"high","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-08","score":0.00571,"percentile":0.47511,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-287"],"published":"2009-12-01T00:00:00Z","modified":"2026-10-23T17:47:49Z","fixes":[{"ecosystem":"Debian:12","package":"grub2","fixed_in":["1.97+20091115-1"],"sources":["osv"]},{"ecosystem":"Debian:13","package":"grub2","fixed_in":["1.97+20091115-1"],"sources":["osv"]},{"ecosystem":"Debian:14","package":"grub2","fixed_in":["1.97+20091115-1"],"sources":["osv"]}],"affected":[{"source":"osv","ecosystem":"Debian:12","package":"grub2","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.97+20091115-1"}]}]},{"source":"osv","ecosystem":"Debian:13","package":"grub2","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.97+20091115-1"}]}]},{"source":"osv","ecosystem":"Debian:14","package":"grub2","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.97+20091115-1"}]}]}],"products":[{"vendor":"gnu","product":"grub_2"}],"references":[{"url":"http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=555195","tags":["x_transferred","Exploit","evidence"]},{"url":"http://www.securityfocus.com/bid/36968","tags":["vdb-entry","x_transferred","Patch","fix"]},{"url":"https://exchange.xforce.ibmcloud.com/vulnerabilities/54210","tags":["vdb-entry","x_transferred","web"]},{"url":"http://www.openwall.com/lists/oss-security/2024/01/15/3","tags":["mailing-list","x_transferred","web"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2009-4128"},{"url":"https://github.com/advisories/GHSA-prgr-9xf7-v9fw"},{"url":"https://security-tracker.debian.org/tracker/CVE-2009-4128","tags":["advisory"]}],"sources":{"cve":[{"id":"CVE-2009-4128","description":"GNU GRand Unified Bootloader (GRUB) 2 1.97 only compares the submitted portion of a password with the actual password, which makes it easier for physically proximate attackers to conduct brute force attacks and bypass authentication by submitting a password whose length is 1.","status":"published","published":"2009-12-01T00:00:00Z","modified":"2024-08-07T06:54:09.498Z","updated_at":"2026-11-02T14:33:24.782697Z"}],"euvd":[{"id":"EUVD-2009-4098","description":"GNU GRand Unified Bootloader (GRUB) 2 1.97 only compares the submitted portion of a password with the actual password, which makes it easier for physically proximate attackers to conduct brute force attacks and bypass authentication by submitting a password whose length is 1.","status":"published","published":"2009-12-01T00:00:00Z","modified":"2024-08-07T06:54:09Z","updated_at":"2026-11-03T01:39:11.214145Z"}],"ghsa":[{"id":"GHSA-prgr-9xf7-v9fw","title":"GNU GRand Unified Bootloader (GRUB) 2 1.97 only compares the submitted portion of a password with...","description":"GNU GRand Unified Bootloader (GRUB) 2 1.97 only compares the submitted portion of a password with the actual password, which makes it easier for physically proximate attackers to conduct brute force attacks and bypass authentication by submitting a password whose length is 1.","status":"published","published":"2022-05-02T03:51:53Z","modified":"2024-01-16T03:30:17Z","cwes":["CWE-287"],"updated_at":"2026-11-02T14:55:25.607975Z"}],"nvd":[{"id":"CVE-2009-4128","description":"GNU GRand Unified Bootloader (GRUB) 2 1.97 only compares the submitted portion of a password with the actual password, which makes it easier for physically proximate attackers to conduct brute force attacks and bypass authentication by submitting a password whose length is 1.","status":"published","published":"2009-12-01T16:30:01.467Z","modified":"2026-06-16T23:13:05.39Z","cvss":[{"version":"2.0","score":7.2,"vector":"AV:L/AC:L/Au:N/C:C/I:C/A:C","level":"high","assessor":"primary"}],"cwes":["CWE-287"],"updated_at":"2026-11-02T14:01:37.939838Z"}],"osv":[{"id":"CVE-2009-4128","description":"GNU GRand Unified Bootloader (GRUB) 2 1.97 only compares the submitted portion of a password with the actual password, which makes it easier for physically proximate attackers to conduct brute force attacks and bypass authentication by submitting a password whose length is 1.","status":"published","published":"2009-12-01T16:30:01Z","modified":"2026-04-10T03:41:00.394297Z","updated_at":"2026-11-02T15:43:57.714116Z"},{"id":"DEBIAN-CVE-2009-4128","description":"GNU GRand Unified Bootloader (GRUB) 2 1.97 only compares the submitted portion of a password with the actual password, which makes it easier for physically proximate attackers to conduct brute force attacks and bypass authentication by submitting a password whose length is 1.","status":"published","published":"2009-12-01T16:30:01.467Z","modified":"2026-10-23T17:47:49.463691825Z","updated_at":"2026-11-02T15:45:24.013654Z"}]}}