Integer Overflow or Wraparound Affecting kernel-bootwrapper package, versions <0:3.10.0-1062.26.1.el7


Severity

Recommended
high

Based on Red Hat Enterprise Linux security rating

    Threat Intelligence

    EPSS
    0.08% (38th percentile)

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  • Snyk ID SNYK-RHEL7-KERNELBOOTWRAPPER-4967449
  • published 26 Jul 2021
  • disclosed 26 Jul 2019

How to fix?

Upgrade RHEL:7 kernel-bootwrapper to version 0:3.10.0-1062.26.1.el7 or higher.
This issue was patched in RHSA-2020:2522.

NVD Description

Note: Versions mentioned in the description apply only to the upstream kernel-bootwrapper package and not the kernel-bootwrapper package as distributed by RHEL. See How to fix? for RHEL:7 relevant fixed versions and status.

In the Linux kernel before 5.2.3, set_geometry in drivers/block/floppy.c does not validate the sect and head fields, as demonstrated by an integer overflow and out-of-bounds read. It can be triggered by an unprivileged local user when a floppy disk has been inserted. NOTE: QEMU creates the floppy device by default.

CVSS Scores

version 3.1
Expand this section

SUSE

6.1 medium
  • Attack Vector (AV)
    Local
  • Attack Complexity (AC)
    Low
  • Privileges Required (PR)
    Low
  • User Interaction (UI)
    None
  • Scope (S)
    Unchanged
  • Confidentiality (C)
    Low
  • Integrity (I)
    None
  • Availability (A)
    High