CVE-2015-8370
Vulnerability from cvelistv5
Published
2015-12-16 00:00
Modified
2024-10-21 16:51
Severity ?
7.4 (High) - CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Summary
Multiple integer underflows in Grub2 1.98 through 2.02 allow physically proximate attackers to bypass authentication, obtain sensitive information, or cause a denial of service (disk corruption) via backspace characters in the (1) grub_username_get function in grub-core/normal/auth.c or the (2) grub_password_get function in lib/crypto.c, which trigger an "Off-by-two" or "Out of bounds overwrite" memory error.
References
cve@mitre.orghttp://hmarco.org/bugs/CVE-2015-8370-Grub2-authentication-bypass.htmlExploit
cve@mitre.orghttp://lists.fedoraproject.org/pipermail/package-announce/2015-December/173703.html
cve@mitre.orghttp://lists.fedoraproject.org/pipermail/package-announce/2015-December/174049.html
cve@mitre.orghttp://lists.opensuse.org/opensuse-security-announce/2015-12/msg00037.html
cve@mitre.orghttp://lists.opensuse.org/opensuse-security-announce/2015-12/msg00039.html
cve@mitre.orghttp://lists.opensuse.org/opensuse-security-announce/2015-12/msg00040.html
cve@mitre.orghttp://lists.opensuse.org/opensuse-security-announce/2015-12/msg00041.html
cve@mitre.orghttp://lists.opensuse.org/opensuse-security-announce/2015-12/msg00043.html
cve@mitre.orghttp://lists.opensuse.org/opensuse-security-announce/2015-12/msg00044.html
cve@mitre.orghttp://lists.opensuse.org/opensuse-security-announce/2016-01/msg00003.html
cve@mitre.orghttp://packetstormsecurity.com/files/134831/Grub2-Authentication-Bypass.html
cve@mitre.orghttp://rhn.redhat.com/errata/RHSA-2015-2623.html
cve@mitre.orghttp://seclists.org/fulldisclosure/2015/Dec/69
cve@mitre.orghttp://www.debian.org/security/2015/dsa-3421
cve@mitre.orghttp://www.openwall.com/lists/oss-security/2015/12/15/6
cve@mitre.orghttp://www.openwall.com/lists/oss-security/2024/01/15/3
cve@mitre.orghttp://www.oracle.com/technetwork/topics/security/cpujan2016-2367955.htmlPatch
cve@mitre.orghttp://www.oracle.com/technetwork/topics/security/linuxbulletinoct2015-2719645.html
cve@mitre.orghttp://www.securityfocus.com/archive/1/537115/100/0/threaded
cve@mitre.orghttp://www.securityfocus.com/bid/79358
cve@mitre.orghttp://www.securitytracker.com/id/1034422
cve@mitre.orghttp://www.ubuntu.com/usn/USN-2836-1
cve@mitre.orghttps://security.gentoo.org/glsa/201512-03
af854a3a-2127-422b-91ae-364da2661108http://hmarco.org/bugs/CVE-2015-8370-Grub2-authentication-bypass.htmlExploit
af854a3a-2127-422b-91ae-364da2661108http://lists.fedoraproject.org/pipermail/package-announce/2015-December/173703.html
af854a3a-2127-422b-91ae-364da2661108http://lists.fedoraproject.org/pipermail/package-announce/2015-December/174049.html
af854a3a-2127-422b-91ae-364da2661108http://lists.opensuse.org/opensuse-security-announce/2015-12/msg00037.html
af854a3a-2127-422b-91ae-364da2661108http://lists.opensuse.org/opensuse-security-announce/2015-12/msg00039.html
af854a3a-2127-422b-91ae-364da2661108http://lists.opensuse.org/opensuse-security-announce/2015-12/msg00040.html
af854a3a-2127-422b-91ae-364da2661108http://lists.opensuse.org/opensuse-security-announce/2015-12/msg00041.html
af854a3a-2127-422b-91ae-364da2661108http://lists.opensuse.org/opensuse-security-announce/2015-12/msg00043.html
af854a3a-2127-422b-91ae-364da2661108http://lists.opensuse.org/opensuse-security-announce/2015-12/msg00044.html
af854a3a-2127-422b-91ae-364da2661108http://lists.opensuse.org/opensuse-security-announce/2016-01/msg00003.html
af854a3a-2127-422b-91ae-364da2661108http://packetstormsecurity.com/files/134831/Grub2-Authentication-Bypass.html
af854a3a-2127-422b-91ae-364da2661108http://rhn.redhat.com/errata/RHSA-2015-2623.html
af854a3a-2127-422b-91ae-364da2661108http://seclists.org/fulldisclosure/2015/Dec/69
af854a3a-2127-422b-91ae-364da2661108http://www.debian.org/security/2015/dsa-3421
af854a3a-2127-422b-91ae-364da2661108http://www.openwall.com/lists/oss-security/2015/12/15/6
af854a3a-2127-422b-91ae-364da2661108http://www.openwall.com/lists/oss-security/2024/01/15/3
af854a3a-2127-422b-91ae-364da2661108http://www.oracle.com/technetwork/topics/security/cpujan2016-2367955.htmlPatch
af854a3a-2127-422b-91ae-364da2661108http://www.oracle.com/technetwork/topics/security/linuxbulletinoct2015-2719645.html
af854a3a-2127-422b-91ae-364da2661108http://www.securityfocus.com/archive/1/537115/100/0/threaded
af854a3a-2127-422b-91ae-364da2661108http://www.securityfocus.com/bid/79358
af854a3a-2127-422b-91ae-364da2661108http://www.securitytracker.com/id/1034422
af854a3a-2127-422b-91ae-364da2661108http://www.ubuntu.com/usn/USN-2836-1
af854a3a-2127-422b-91ae-364da2661108https://security.gentoo.org/glsa/201512-03
Impacted products
Vendor Product Version
Show details on NVD website

To clipboard 

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    "nvd": "{\"cve\":{\"id\":\"CVE-2015-8370\",\"sourceIdentifier\":\"cve@mitre.org\",\"published\":\"2015-12-16T21:59:04.063\",\"lastModified\":\"2024-11-21T02:38:23.410\",\"vulnStatus\":\"Modified\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"Multiple integer underflows in Grub2 1.98 through 2.02 allow physically proximate attackers to bypass authentication, obtain sensitive information, or cause a denial of service (disk corruption) via backspace characters in the (1) grub_username_get function in grub-core/normal/auth.c or the (2) grub_password_get function in lib/crypto.c, which trigger an \\\"Off-by-two\\\" or \\\"Out of bounds overwrite\\\" memory error.\"},{\"lang\":\"es\",\"value\":\"M\u00faltiple desbordamiento inferior de entero en Grub2 1.98 hasta la versi\u00f3n 2.02 permite a atacantes f\u00edsicamente pr\u00f3ximos eludir la autenticaci\u00f3n, obtener informaci\u00f3n sensible o causar una denegaci\u00f3n de servicio (corrupci\u00f3n de disco) a trav\u00e9s del car\u00e1cter backspace en la funci\u00f3n (1) grub_username_get en grub-core/normal/auth.c o (2) grub_password_get en lib/crypto.c, lo que desencadena un error de memoria \u0027Off-by-two\u0027 o \u0027Out of bounds overwrite\u0027.\"}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"134c704f-9b21-4f2e-91b3-4a467353bcc0\",\"type\":\"Secondary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H\",\"baseScore\":7.4,\"baseSeverity\":\"HIGH\",\"attackVector\":\"LOCAL\",\"attackComplexity\":\"HIGH\",\"privilegesRequired\":\"NONE\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"HIGH\",\"integrityImpact\":\"HIGH\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":1.4,\"impactScore\":5.9}],\"cvssMetricV2\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"cvssData\":{\"version\":\"2.0\",\"vectorString\":\"AV:L/AC:M/Au:N/C:C/I:C/A:C\",\"baseScore\":6.9,\"accessVector\":\"LOCAL\",\"accessComplexity\":\"MEDIUM\",\"authentication\":\"NONE\",\"confidentialityImpact\":\"COMPLETE\",\"integrityImpact\":\"COMPLETE\",\"availabilityImpact\":\"COMPLETE\"},\"baseSeverity\":\"MEDIUM\",\"exploitabilityScore\":3.4,\"impactScore\":10.0,\"acInsufInfo\":false,\"obtainAllPrivilege\":false,\"obtainUserPrivilege\":false,\"obtainOtherPrivilege\":false,\"userInteractionRequired\":false}]},\"weaknesses\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-264\"}]},{\"source\":\"134c704f-9b21-4f2e-91b3-4a467353bcc0\",\"type\":\"Secondary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-191\"}]}],\"configurations\":[{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:gnu:grub2:1.98:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"936B2F89-3A97-46A8-B776-CF605C192CA2\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:gnu:grub2:1.99:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"6FB62F6A-8B42-4186-99AF-2A07050EB19E\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:gnu:grub2:2.00:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"D3AB3BF3-95F2-43C6-8445-4B749135BE8E\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:gnu:grub2:2.01:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"F3C7F246-9B64-49C4-B358-C5A62C3A2458\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:gnu:grub2:2.02:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"7AEB4A3C-A448-4C7D-8F08-57940E13BB6D\"}]}]},{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:fedoraproject:fedora:23:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"E79AB8DD-C907-4038-A931-1A5A4CFB6A5B\"}]}]}],\"references\":[{\"url\":\"http://hmarco.org/bugs/CVE-2015-8370-Grub2-authentication-bypass.html\",\"source\":\"cve@mitre.org\",\"tags\":[\"Exploit\"]},{\"url\":\"http://lists.fedoraproject.org/pipermail/package-announce/2015-December/173703.html\",\"source\":\"cve@mitre.org\"},{\"url\":\"http://lists.fedoraproject.org/pipermail/package-announce/2015-December/174049.html\",\"source\":\"cve@mitre.org\"},{\"url\":\"http://lists.opensuse.org/opensuse-security-announce/2015-12/msg00037.html\",\"source\":\"cve@mitre.org\"},{\"url\":\"http://lists.opensuse.org/opensuse-security-announce/2015-12/msg00039.html\",\"source\":\"cve@mitre.org\"},{\"url\":\"http://lists.opensuse.org/opensuse-security-announce/2015-12/msg00040.html\",\"source\":\"cve@mitre.org\"},{\"url\":\"http://lists.opensuse.org/opensuse-security-announce/2015-12/msg00041.html\",\"source\":\"cve@mitre.org\"},{\"url\":\"http://lists.opensuse.org/opensuse-security-announce/2015-12/msg00043.html\",\"source\":\"cve@mitre.org\"},{\"url\":\"http://lists.opensuse.org/opensuse-security-announce/2015-12/msg00044.html\",\"source\":\"cve@mitre.org\"},{\"url\":\"http://lists.opensuse.org/opensuse-security-announce/2016-01/msg00003.html\",\"source\":\"cve@mitre.org\"},{\"url\":\"http://packetstormsecurity.com/files/134831/Grub2-Authentication-Bypass.html\",\"source\":\"cve@mitre.org\"},{\"url\":\"http://rhn.redhat.com/errata/RHSA-2015-2623.html\",\"source\":\"cve@mitre.org\"},{\"url\":\"http://seclists.org/fulldisclosure/2015/Dec/69\",\"source\":\"cve@mitre.org\"},{\"url\":\"http://www.debian.org/security/2015/dsa-3421\",\"source\":\"cve@mitre.org\"},{\"url\":\"http://www.openwall.com/lists/oss-security/2015/12/15/6\",\"source\":\"cve@mitre.org\"},{\"url\":\"http://www.openwall.com/lists/oss-security/2024/01/15/3\",\"source\":\"cve@mitre.org\"},{\"url\":\"http://www.oracle.com/technetwork/topics/security/cpujan2016-2367955.html\",\"source\":\"cve@mitre.org\",\"tags\":[\"Patch\"]},{\"url\":\"http://www.oracle.com/technetwork/topics/security/linuxbulletinoct2015-2719645.html\",\"source\":\"cve@mitre.org\"},{\"url\":\"http://www.securityfocus.com/archive/1/537115/100/0/threaded\",\"source\":\"cve@mitre.org\"},{\"url\":\"http://www.securityfocus.com/bid/79358\",\"source\":\"cve@mitre.org\"},{\"url\":\"http://www.securitytracker.com/id/1034422\",\"source\":\"cve@mitre.org\"},{\"url\":\"http://www.ubuntu.com/usn/USN-2836-1\",\"source\":\"cve@mitre.org\"},{\"url\":\"https://security.gentoo.org/glsa/201512-03\",\"source\":\"cve@mitre.org\"},{\"url\":\"http://hmarco.org/bugs/CVE-2015-8370-Grub2-authenticat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  }
}


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