Vulnerability-Lookup

CVE-2015-8370 (GCVE-0-2015-8370)

Vulnerability from cvelistv5 – Published: 2015-12-16 00:00 – Updated: 2024-10-21 16:51

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.

Severity

7.4 (High)


                        
                          CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

SSVC

Exploitation: poc Automatable: no Technical Impact: total

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2024-03-06 21:01 UTC

CWE

n/a
CWE-191 - Integer Underflow (Wrap or Wraparound)

Assigner

mitre mitre root

References

23 references

URL	Tags
http://packetstormsecurity.com/files/134831/Grub2…
http://lists.opensuse.org/opensuse-security-annou…	vendor-advisory
http://lists.opensuse.org/opensuse-security-annou…	vendor-advisory
http://hmarco.org/bugs/CVE-2015-8370-Grub2-authen…
http://www.securityfocus.com/bid/79358	vdb-entry
http://lists.opensuse.org/opensuse-security-annou…	vendor-advisory
http://www.securitytracker.com/id/1034422	vdb-entry
http://www.oracle.com/technetwork/topics/security…
http://lists.opensuse.org/opensuse-security-annou…	vendor-advisory
http://lists.opensuse.org/opensuse-security-annou…	vendor-advisory
http://www.oracle.com/technetwork/topics/security…
http://www.openwall.com/lists/oss-security/2015/12/15/6	mailing-list
http://www.securityfocus.com/archive/1/537115/100…	mailing-list
http://lists.opensuse.org/opensuse-security-annou…	vendor-advisory
http://seclists.org/fulldisclosure/2015/Dec/69	mailing-list
https://security.gentoo.org/glsa/201512-03	vendor-advisory
http://lists.fedoraproject.org/pipermail/package-…	vendor-advisory
http://www.ubuntu.com/usn/USN-2836-1	vendor-advisory
http://lists.fedoraproject.org/pipermail/package-…	vendor-advisory
http://rhn.redhat.com/errata/RHSA-2015-2623.html	vendor-advisory
http://lists.opensuse.org/opensuse-security-annou…	vendor-advisory
http://www.debian.org/security/2015/dsa-3421	vendor-advisory
http://www.openwall.com/lists/oss-security/2024/01/15/3	mailing-list

Date Public

2015-12-10 00:00

Show details on NVD website

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\"af854a3a-2127-422b-91ae-364da2661108\"}, {\"url\": \"http://www.oracle.com/technetwork/topics/security/cpujan2016-2367955.html\", \"source\": \"af854a3a-2127-422b-91ae-364da2661108\", \"tags\": [\"Patch\"]}, {\"url\": \"http://www.oracle.com/technetwork/topics/security/linuxbulletinoct2015-2719645.html\", \"source\": \"af854a3a-2127-422b-91ae-364da2661108\"}, {\"url\": \"http://www.securityfocus.com/archive/1/537115/100/0/threaded\", \"source\": \"af854a3a-2127-422b-91ae-364da2661108\"}, {\"url\": \"http://www.securityfocus.com/bid/79358\", \"source\": \"af854a3a-2127-422b-91ae-364da2661108\"}, {\"url\": \"http://www.securitytracker.com/id/1034422\", \"source\": \"af854a3a-2127-422b-91ae-364da2661108\"}, {\"url\": \"http://www.ubuntu.com/usn/USN-2836-1\", \"source\": \"af854a3a-2127-422b-91ae-364da2661108\"}, {\"url\": \"https://security.gentoo.org/glsa/201512-03\", \"source\": \"af854a3a-2127-422b-91ae-364da2661108\"}]",
      "sourceIdentifier": "cve@mitre.org",
      "vulnStatus": "Modified",
      "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\"}]}]"
    },
    "microsoft_vex": {
      "current_release_date": "2020-08-18T00:00:00.000Z",
      "cve": "CVE-2015-8370",
      "id": "msrc_CVE-2015-8370",
      "initial_release_date": "2015-12-02T00:00:00.000Z",
      "product_status:fixed": "1",
      "product_status:known_affected": "1",
      "source": "Microsoft CSAF VEX",
      "status": "final",
      "title": "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.",
      "url": "https://msrc.microsoft.com/csaf/vex/2015/msrc_cve-2015-8370.json",
      "version": "1"
    },
    "nvd": "{\"cve\":{\"id\":\"CVE-2015-8370\",\"sourceIdentifier\":\"cve@mitre.org\",\"published\":\"2015-12-16T21:59:04.063\",\"lastModified\":\"2026-05-06T22:30:45.220\",\"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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    "redhat_vex": {
      "aggregate_severity": "Moderate",
      "current_release_date": "2025-11-21T14:28:38+00:00",
      "cve": "CVE-2015-8370",
      "id": "CVE-2015-8370",
      "initial_release_date": "2015-12-10T00:00:00+00:00",
      "product_status:fixed": "96",
      "product_status:known_not_affected": "21",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "grub2: buffer overflow when checking password entered during bootup",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2015/cve-2015-8370.json",
      "version": "3"
    },
    "suse_vex": {
      "aggregate_severity": "moderate",
      "current_release_date": "2026-09-01T02:25:45Z",
      "cve": "CVE-2015-8370",
      "id": "CVE-2015-8370",
      "initial_release_date": "2023-02-15T05:12:24Z",
      "product_status:known_affected": "321",
      "product_status:recommended": "806",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2015-8370",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2015-8370.json",
      "version": "36"
    },
    "vulnrichment": {
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\"http://www.securitytracker.com/id/1034422\", \"name\": \"1034422\", \"tags\": [\"vdb-entry\", \"x_transferred\"]}, {\"url\": \"http://www.oracle.com/technetwork/topics/security/cpujan2016-2367955.html\", \"tags\": [\"x_transferred\"]}, {\"url\": \"http://lists.opensuse.org/opensuse-security-announce/2015-12/msg00041.html\", \"name\": \"SUSE-SU-2015:2387\", \"tags\": [\"vendor-advisory\", \"x_transferred\"]}, {\"url\": \"http://lists.opensuse.org/opensuse-security-announce/2015-12/msg00040.html\", \"name\": \"SUSE-SU-2015:2386\", \"tags\": [\"vendor-advisory\", \"x_transferred\"]}, {\"url\": \"http://www.oracle.com/technetwork/topics/security/linuxbulletinoct2015-2719645.html\", \"tags\": [\"x_transferred\"]}, {\"url\": \"http://www.openwall.com/lists/oss-security/2015/12/15/6\", \"name\": \"[oss-security] 20151215 Back to 28: Grub2 Authentication Bypass 0-Day [CVE-2015-8370]\", \"tags\": [\"mailing-list\", \"x_transferred\"]}, {\"url\": \"http://www.securityfocus.com/archive/1/537115/100/0/threaded\", \"name\": \"20151215 Back to 28: Grub2 Authentication Bypass 0-Day [CVE-2015-8370]\", \"tags\": [\"mailing-list\", \"x_transferred\"]}, {\"url\": \"http://lists.opensuse.org/opensuse-security-announce/2015-12/msg00039.html\", \"name\": \"SUSE-SU-2015:2385\", \"tags\": [\"vendor-advisory\", \"x_transferred\"]}, {\"url\": \"http://seclists.org/fulldisclosure/2015/Dec/69\", \"name\": \"20151216 Back to 28: Grub2 Authentication Bypass 0-Day [CVE-2015-8370]\", \"tags\": [\"mailing-list\", \"x_transferred\"]}, {\"url\": \"https://security.gentoo.org/glsa/201512-03\", \"name\": \"GLSA-201512-03\", \"tags\": [\"vendor-advisory\", \"x_transferred\"]}, {\"url\": \"http://lists.fedoraproject.org/pipermail/package-announce/2015-December/173703.html\", \"name\": \"FEDORA-2015-cebe5133e7\", \"tags\": [\"vendor-advisory\", \"x_transferred\"]}, {\"url\": \"http://www.ubuntu.com/usn/USN-2836-1\", \"name\": \"USN-2836-1\", \"tags\": [\"vendor-advisory\", \"x_transferred\"]}, {\"url\": \"http://lists.fedoraproject.org/pipermail/package-announce/2015-December/174049.html\", \"name\": \"FEDORA-2015-90c27b6e91\", \"tags\": [\"vendor-advisory\", \"x_transferred\"]}, {\"url\": \"http://rhn.redhat.com/errata/RHSA-2015-2623.html\", \"name\": \"RHSA-2015:2623\", \"tags\": [\"vendor-advisory\", \"x_transferred\"]}, {\"url\": \"http://lists.opensuse.org/opensuse-security-announce/2015-12/msg00044.html\", \"name\": \"SUSE-SU-2015:2399\", \"tags\": [\"vendor-advisory\", \"x_transferred\"]}, {\"url\": \"http://www.debian.org/security/2015/dsa-3421\", \"name\": \"DSA-3421\", \"tags\": [\"vendor-advisory\", \"x_transferred\"]}, {\"url\": \"http://www.openwall.com/lists/oss-security/2024/01/15/3\", \"name\": \"[oss-security] 20240116 CVE-2023-4001: a password bypass vulnerability in the downstream GRUB boot manager\", \"tags\": [\"mailing-list\", \"x_transferred\"]}], \"providerMetadata\": {\"orgId\": \"af854a3a-2127-422b-91ae-364da2661108\", \"shortName\": \"CVE\", \"dateUpdated\": \"2024-08-06T08:13:32.834Z\"}}, {\"title\": \"CISA ADP Vulnrichment\", \"metrics\": [{\"cvssV3_1\": {\"scope\": \"UNCHANGED\", \"version\": \"3.1\", \"baseScore\": 7.4, \"attackVector\": \"LOCAL\", \"baseSeverity\": \"HIGH\", \"vectorString\": \"CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H\", \"integrityImpact\": \"HIGH\", \"userInteraction\": \"NONE\", \"attackComplexity\": \"HIGH\", \"availabilityImpact\": \"HIGH\", \"privilegesRequired\": \"NONE\", \"confidentialityImpact\": \"HIGH\"}}, {\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2015-8370\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"poc\"}, {\"Automatable\": \"no\"}, {\"Technical Impact\": \"total\"}], \"version\": \"2.0.3\", \"timestamp\": \"2024-03-06T21:01:48.674436Z\"}}}], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en\", \"type\": \"CWE\", \"cweId\": \"CWE-191\", \"description\": \"CWE-191 Integer Underflow (Wrap or Wraparound)\"}]}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2024-10-21T16:51:53.221Z\"}}], \"cna\": {\"affected\": [{\"vendor\": \"n/a\", \"product\": \"n/a\", \"versions\": [{\"status\": \"affected\", \"version\": \"n/a\"}]}], \"datePublic\": \"2015-12-10T00:00:00.000Z\", \"references\": [{\"url\": \"http://packetstormsecurity.com/files/134831/Grub2-Authentication-Bypass.html\"}, {\"url\": \"http://lists.opensuse.org/opensuse-security-announce/2015-12/msg00043.html\", \"name\": \"openSUSE-SU-2015:2392\", \"tags\": [\"vendor-advisory\"]}, {\"url\": \"http://lists.opensuse.org/opensuse-security-announce/2016-01/msg00003.html\", \"name\": \"openSUSE-SU-2016:0036\", \"tags\": [\"vendor-advisory\"]}, {\"url\": \"http://hmarco.org/bugs/CVE-2015-8370-Grub2-authentication-bypass.html\"}, {\"url\": \"http://www.securityfocus.com/bid/79358\", \"name\": \"79358\", \"tags\": [\"vdb-entry\"]}, {\"url\": \"http://lists.opensuse.org/opensuse-security-announce/2015-12/msg00037.html\", \"name\": \"openSUSE-SU-2015:2375\", \"tags\": [\"vendor-advisory\"]}, {\"url\": \"http://www.securitytracker.com/id/1034422\", \"name\": \"1034422\", \"tags\": [\"vdb-entry\"]}, {\"url\": \"http://www.oracle.com/technetwork/topics/security/cpujan2016-2367955.html\"}, {\"url\": \"http://lists.opensuse.org/opensuse-security-announce/2015-12/msg00041.html\", \"name\": \"SUSE-SU-2015:2387\", \"tags\": [\"vendor-advisory\"]}, {\"url\": \"http://lists.opensuse.org/opensuse-security-announce/2015-12/msg00040.html\", \"name\": \"SUSE-SU-2015:2386\", \"tags\": [\"vendor-advisory\"]}, {\"url\": \"http://www.oracle.com/technetwork/topics/security/linuxbulletinoct2015-2719645.html\"}, {\"url\": \"http://www.openwall.com/lists/oss-security/2015/12/15/6\", \"name\": \"[oss-security] 20151215 Back to 28: Grub2 Authentication Bypass 0-Day [CVE-2015-8370]\", \"tags\": [\"mailing-list\"]}, {\"url\": \"http://www.securityfocus.com/archive/1/537115/100/0/threaded\", \"name\": \"20151215 Back to 28: Grub2 Authentication Bypass 0-Day [CVE-2015-8370]\", \"tags\": [\"mailing-list\"]}, {\"url\": \"http://lists.opensuse.org/opensuse-security-announce/2015-12/msg00039.html\", \"name\": \"SUSE-SU-2015:2385\", \"tags\": [\"vendor-advisory\"]}, {\"url\": \"http://seclists.org/fulldisclosure/2015/Dec/69\", \"name\": \"20151216 Back to 28: Grub2 Authentication Bypass 0-Day [CVE-2015-8370]\", \"tags\": [\"mailing-list\"]}, {\"url\": \"https://security.gentoo.org/glsa/201512-03\", \"name\": \"GLSA-201512-03\", \"tags\": [\"vendor-advisory\"]}, {\"url\": \"http://lists.fedoraproject.org/pipermail/package-announce/2015-December/173703.html\", \"name\": \"FEDORA-2015-cebe5133e7\", \"tags\": [\"vendor-advisory\"]}, {\"url\": \"http://www.ubuntu.com/usn/USN-2836-1\", \"name\": \"USN-2836-1\", \"tags\": [\"vendor-advisory\"]}, {\"url\": \"http://lists.fedoraproject.org/pipermail/package-announce/2015-December/174049.html\", \"name\": \"FEDORA-2015-90c27b6e91\", \"tags\": [\"vendor-advisory\"]}, {\"url\": \"http://rhn.redhat.com/errata/RHSA-2015-2623.html\", \"name\": \"RHSA-2015:2623\", \"tags\": [\"vendor-advisory\"]}, {\"url\": \"http://lists.opensuse.org/opensuse-security-announce/2015-12/msg00044.html\", \"name\": \"SUSE-SU-2015:2399\", \"tags\": [\"vendor-advisory\"]}, {\"url\": \"http://www.debian.org/security/2015/dsa-3421\", \"name\": \"DSA-3421\", \"tags\": [\"vendor-advisory\"]}, {\"url\": \"http://www.openwall.com/lists/oss-security/2024/01/15/3\", \"name\": \"[oss-security] 20240116 CVE-2023-4001: a password bypass vulnerability in the downstream GRUB boot manager\", \"tags\": [\"mailing-list\"]}], \"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.\"}], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en\", \"type\": \"text\", \"description\": \"n/a\"}]}], \"providerMetadata\": {\"orgId\": \"8254265b-2729-46b6-b9e3-3dfca2d5bfca\", \"shortName\": \"mitre\", \"dateUpdated\": \"2024-01-16T00:06:19.101Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2015-8370\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2024-10-21T16:51:57.721Z\", \"dateReserved\": \"2015-11-27T00:00:00.000Z\", \"assignerOrgId\": \"8254265b-2729-46b6-b9e3-3dfca2d5bfca\", \"datePublished\": \"2015-12-16T00:00:00.000Z\", \"assignerShortName\": \"mitre\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.1"
    }
  }
}

SUSE-SU-2015:2385-1

Vulnerability from csaf_suse - Published: 2015-12-29 08:04 - Updated: 2015-12-29 08:04

Summary

Security update for grub2

Severity

Important

Scope

1 vulnerability in this advisory, including CVE-2015-8370.

CVE-2015-8370

Recommended: 6 products

Open the full advisory

SUSE-SU-2015:2386-1

Vulnerability from csaf_suse - Published: 2015-12-29 08:04 - Updated: 2015-12-29 08:04

Summary

Security update for grub2

Severity

Important

Scope

1 vulnerability in this advisory, including CVE-2015-8370.

CVE-2015-8370

Recommended: 8 products

Open the full advisory

SUSE-SU-2015:2387-1

Vulnerability from csaf_suse - Published: 2015-12-29 08:05 - Updated: 2015-12-29 08:05

Summary

Security update for grub2

Severity

Important

Scope

1 vulnerability in this advisory, including CVE-2015-8370.

CVE-2015-8370

Recommended: 23 products

Open the full advisory

SUSE-SU-2015:2399-1

Vulnerability from csaf_suse - Published: 2015-12-30 07:31 - Updated: 2015-12-30 07:31

Summary

Security update for grub2

Severity

Important

Scope

1 vulnerability in this advisory, including CVE-2015-8370.

CVE-2015-8370

Recommended: 23 products

Open the full advisory

ubuntu-cve-2015-8370

Vulnerability from osv_ubuntu

Published

2015-12-11 00:00

Modified

2025-09-08 16:43

Summary

Details

Severity

7.4 (High)


                    
                      CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

N/A (UNKNOWN)


                    
                      medium

References

URL

Type

	https://ubuntu.com/security/CVE-2015-8370	REPORT
	https://twitter.com/lostinsecurity/status/6749259…	REPORT
	http://hmarco.org/bugs/CVE-2015-8370-Grub2-authen…	REPORT
	https://ubuntu.com/security/notices/USN-2836-1	ADVISORY
	https://www.cve.org/CVERecord?id=CVE-2015-8370	REPORT

JSON

To clipboard

{
  "affected": [
    {
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "grub-common",
            "binary_version": "2.02~beta2-9ubuntu1.6"
          },
          {
            "binary_name": "grub-coreboot",
            "binary_version": "2.02~beta2-9ubuntu1.6"
          },
          {
            "binary_name": "grub-coreboot-bin",
            "binary_version": "2.02~beta2-9ubuntu1.6"
          },
          {
            "binary_name": "grub-efi",
            "binary_version": "2.02~beta2-9ubuntu1.6"
          },
          {
            "binary_name": "grub-efi-amd64",
            "binary_version": "2.02~beta2-9ubuntu1.6"
          },
          {
            "binary_name": "grub-efi-amd64-bin",
            "binary_version": "2.02~beta2-9ubuntu1.6"
          },
          {
            "binary_name": "grub-efi-arm",
            "binary_version": "2.02~beta2-9ubuntu1.6"
          },
          {
            "binary_name": "grub-efi-arm-bin",
            "binary_version": "2.02~beta2-9ubuntu1.6"
          },
          {
            "binary_name": "grub-efi-arm64",
            "binary_version": "2.02~beta2-9ubuntu1.6"
          },
          {
            "binary_name": "grub-efi-arm64-bin",
            "binary_version": "2.02~beta2-9ubuntu1.6"
          },
          {
            "binary_name": "grub-efi-ia32",
            "binary_version": "2.02~beta2-9ubuntu1.6"
          },
          {
            "binary_name": "grub-efi-ia32-bin",
            "binary_version": "2.02~beta2-9ubuntu1.6"
          },
          {
            "binary_name": "grub-emu",
            "binary_version": "2.02~beta2-9ubuntu1.6"
          },
          {
            "binary_name": "grub-firmware-qemu",
            "binary_version": "2.02~beta2-9ubuntu1.6"
          },
          {
            "binary_name": "grub-ieee1275",
            "binary_version": "2.02~beta2-9ubuntu1.6"
          },
          {
            "binary_name": "grub-ieee1275-bin",
            "binary_version": "2.02~beta2-9ubuntu1.6"
          },
          {
            "binary_name": "grub-linuxbios",
            "binary_version": "2.02~beta2-9ubuntu1.6"
          },
          {
            "binary_name": "grub-pc",
            "binary_version": "2.02~beta2-9ubuntu1.6"
          },
          {
            "binary_name": "grub-pc-bin",
            "binary_version": "2.02~beta2-9ubuntu1.6"
          },
          {
            "binary_name": "grub-rescue-pc",
            "binary_version": "2.02~beta2-9ubuntu1.6"
          },
          {
            "binary_name": "grub-theme-starfield",
            "binary_version": "2.02~beta2-9ubuntu1.6"
          },
          {
            "binary_name": "grub-uboot",
            "binary_version": "2.02~beta2-9ubuntu1.6"
          },
          {
            "binary_name": "grub-uboot-bin",
            "binary_version": "2.02~beta2-9ubuntu1.6"
          },
          {
            "binary_name": "grub-xen",
            "binary_version": "2.02~beta2-9ubuntu1.6"
          },
          {
            "binary_name": "grub-xen-bin",
            "binary_version": "2.02~beta2-9ubuntu1.6"
          },
          {
            "binary_name": "grub2",
            "binary_version": "2.02~beta2-9ubuntu1.6"
          },
          {
            "binary_name": "grub2-common",
            "binary_version": "2.02~beta2-9ubuntu1.6"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:14.04:LTS",
        "name": "grub2",
        "purl": "pkg:deb/ubuntu/grub2@2.02~beta2-9ubuntu1.6?arch=source\u0026distro=trusty"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "2.02~beta2-9ubuntu1.6"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "2.00-19ubuntu2",
        "2.00-19ubuntu3",
        "2.00-19ubuntu4",
        "2.00-20",
        "2.00-21",
        "2.00-22",
        "2.02~beta2-5",
        "2.02~beta2-6",
        "2.02~beta2-7",
        "2.02~beta2-8",
        "2.02~beta2-9",
        "2.02~beta2-9ubuntu1",
        "2.02~beta2-9ubuntu1.1",
        "2.02~beta2-9ubuntu1.2",
        "2.02~beta2-9ubuntu1.3",
        "2.02~beta2-9ubuntu1.4",
        "2.02~beta2-9ubuntu1.5"
      ]
    }
  ],
  "aliases": [],
  "details": "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.",
  "id": "UBUNTU-CVE-2015-8370",
  "modified": "2025-09-08T16:43:29Z",
  "published": "2015-12-11T00:00:00Z",
  "references": [
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2015-8370"
    },
    {
      "type": "REPORT",
      "url": "https://twitter.com/lostinsecurity/status/674925944524640257"
    },
    {
      "type": "REPORT",
      "url": "http://hmarco.org/bugs/CVE-2015-8370-Grub2-authentication-bypass.html"
    },
    {
      "type": "ADVISORY",
      "url": "https://ubuntu.com/security/notices/USN-2836-1"
    },
    {
      "type": "REPORT",
      "url": "https://www.cve.org/CVERecord?id=CVE-2015-8370"
    }
  ],
  "related": [
    "USN-2836-1"
  ],
  "schema_version": "1.7.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    },
    {
      "score": "medium",
      "type": "Ubuntu"
    }
  ],
  "upstream": [
    "CVE-2015-8370"
  ]
}

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.

Action not permitted

CVE-2015-8370 (GCVE-0-2015-8370)

SUSE-SU-2015:2385-1

SUSE-SU-2015:2386-1

SUSE-SU-2015:2387-1

SUSE-SU-2015:2399-1

ubuntu-cve-2015-8370

Vulnerability from osv_ubuntu

Tags

Sightings

Nomenclature

Related by attack behaviour