Attacker Value
Unknown
(0 users assessed)
Exploitability
Unknown
(0 users assessed)
User Interaction
None
Privileges Required
High
Attack Vector
Local
0

CVE-2020-14310

Disclosure Date: July 31, 2020 •
CVE-2020-14310 CVSS v3 Base Score: 6.0
Add MITRE ATT&CK tactics and techniques that apply to this CVE.

Description

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.

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CVSS V3 Severity and Metrics
Base Score:
6.0 Medium
Impact Score:
5.2
Exploitability Score:
0.8
Vector:
CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:H
Attack Vector (AV):
Local
Attack Complexity (AC):
Low
Privileges Required (PR):
High
User Interaction (UI):
None
Scope (S):
Unchanged
Confidentiality (C):
None
Integrity (I):
High
Availability (A):
High

General Information

Offensive Application
Unknown
Utility Class
Unknown
Ports
Unknown
OS
Unknown
Vulnerable Versions
grub2 2.06
Prerequisites
Unknown
Discovered By
Unknown
PoC Author
Unknown
Metasploit Module
Unknown
Reporter
Unknown

Vendors

  • canonical,
  • gnu,
  • opensuse,
  • redhat

Products

  • enterprise linux 7.0,
  • enterprise linux 8.0,
  • enterprise linux eus 8.1,
  • enterprise linux eus 8.2,
  • enterprise linux server aus 8.2,
  • enterprise linux server tus 8.2,
  • grub2,
  • leap 15.1,
  • leap 15.2,
  • ubuntu linux 14.04,
  • ubuntu linux 16.04,
  • ubuntu linux 18.04,
  • ubuntu linux 20.04
Technical Analysis