Moderate

CVE-2015-8370 - Permissions, Privileges, and Access Control vulnerability in multiple products

Publication: 2015-12-16
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.

Classification
CWE-264: Permissions, Privileges, and Access Control

Risk level (CVSS 6.9)

Moderate

6.9

Access Vector

  • Network
  • Adjacent Network
  • Local

Access Complexity

  • Low
  • Medium
  • High

Authentication

  • None
  • Single
  • Multiple

Confident. Impact

  • Complete
  • Partial
  • None

Integrity Impact

  • Complete
  • Partial
  • None

Affected Products

  • GNU Grub2 1.98
  • GNU Grub2 1.99
  • GNU Grub2 2.00
  • GNU Grub2 2.01
  • GNU Grub2 2.02
  • Fedoraproject Fedora 23