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

Vulnerability from cvelistv5 – Published: 2015-12-16 00:00 – Updated: 2024-10-21 16:51
VLAI
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
CWE
  • n/a
Assigner
References
Date Public
2015-12-10 00:00
Show details on NVD website
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      "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\"}]}]"
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    "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 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{\"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"
    }
  }
}


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Tags
Taxonomy of the tags.




Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

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.