FKIE_CVE-2020-14310

Vulnerability from fkie_nvd - Published: 2020-07-31 22:15 - Updated: 2024-11-21 05:02
Severity ?
5.7 (Medium) - CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:N/I:H/A:H
6.0 (Medium) - CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:H
Summary
There is an issue on grub2 before version 2.06 at function read_section_as_string(). It expects a font name to be at max UINT32_MAX - 1 length in bytes but it doesn't verify it before proceed with buffer allocation to read the value from the font value. An attacker may leverage that by crafting a malicious font file which has a name with UINT32_MAX, leading to read_section_as_string() to an arithmetic overflow, zero-sized allocation and further heap-based buffer overflow.
References
secalert@redhat.comhttp://lists.opensuse.org/opensuse-security-announce/2020-08/msg00016.htmlMailing List, Third Party Advisory
secalert@redhat.comhttp://lists.opensuse.org/opensuse-security-announce/2020-08/msg00017.htmlMailing List, Third Party Advisory
secalert@redhat.comhttps://bugzilla.redhat.com/show_bug.cgi?id=CVE-2020-14310Issue Tracking, Vendor Advisory
secalert@redhat.comhttps://security.gentoo.org/glsa/202104-05Third Party Advisory
secalert@redhat.comhttps://usn.ubuntu.com/4432-1/Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108http://lists.opensuse.org/opensuse-security-announce/2020-08/msg00016.htmlMailing List, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108http://lists.opensuse.org/opensuse-security-announce/2020-08/msg00017.htmlMailing List, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2020-14310Issue Tracking, Vendor Advisory
af854a3a-2127-422b-91ae-364da2661108https://security.gentoo.org/glsa/202104-05Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://usn.ubuntu.com/4432-1/Third Party Advisory
Impacted products
Vendor Product Version
gnu grub2 *
redhat enterprise_linux 7.0
redhat enterprise_linux 8.0
redhat enterprise_linux_eus 8.1
redhat enterprise_linux_eus 8.2
redhat enterprise_linux_server_aus 8.2
redhat enterprise_linux_server_tus 8.2
opensuse leap 15.1
opensuse leap 15.2
canonical ubuntu_linux 14.04
canonical ubuntu_linux 16.04
canonical ubuntu_linux 18.04
canonical ubuntu_linux 20.04
To clipboard 

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      "value": "Se presenta un problema en grub2 versiones anteriores a 2.06, en la funci\u00f3n read_section_as_string(). Se espera que el nombre de la fuente sea una longitud m\u00e1xima UINT32_MAX - 1 en bytes, pero no lo verifica antes de proceder con la asignaci\u00f3n del b\u00fafer para leer el valor desde el valor de la fuente. Un atacante puede aprovechar esto mediante el dise\u00f1o de un archivo de fuente malicioso que tenga un nombre con UINT32_MAX, conduciendo a la funci\u00f3n read_section_as_string () a un desbordamiento aritm\u00e9tico, asignaci\u00f3n de tama\u00f1o cero y un nuevo desbordamiento de b\u00fafer en la regi\u00f3n heap de la memoria"
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  "lastModified": "2024-11-21T05:02:58.777",
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Sightings

Author Source Type Date

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.