CVE intelligence and bounded remediation

CVE-2020-14310 — There is an issue on grub2 before version 2.06 at function read_section_as_string()

Medium CVSS 6

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.

Severity
Medium
CVSS
6 (3.1)
Published
2020-07-31
CISA KEV
Not currently listed
Ecosystem
software/application
Weaknesses
CWE-122, CWE-190

Affected products

  • 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

Showing 6 representative product identities from 13 source matches. Confirm exact affected versions with the linked vendor and NVD evidence.

Matched remediation archetype

Buffer bounds, memory safety, and memory corruption

This catalog composition supplies bounded fallback guidance. Explicitly reviewed curated workflows load with the complete record below.

Check exposure

  • Identify affected native-code versions, build flags, architectures, parsers, codecs, drivers, and input paths in all shipped artifacts.
  • Determine whether untrusted data reaches the affected routine and the process privilege, sandbox, and network exposure.
  • Confirm statically linked, vendored, firmware, and platform-provided copies, not only package-manager records.

Remediate safely

  • Apply the maintained upstream correction or replace the affected component, then rebuild every dependent artifact from clean inputs.
  • Adopt bounds-checked interfaces, validated sizes and integer conversions, clear ownership, and memory-safe components where practical.
  • Enable supported compiler and runtime hardening and add sanitized tests and fuzz regression seeds derived from non-weaponized fixtures.

Authoritative sources

Complete CVE record and remediation plan

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