Integer Underflow Affecting grub2 package, versions <2.06-3


Severity

Recommended
0.0
high
0
10

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Threat Intelligence

EPSS
0.14% (51st percentile)

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  • Snyk IDSNYK-DEBIAN13-GRUB2-5681873
  • published8 Jun 2022
  • disclosed20 Jul 2023

Introduced: 8 Jun 2022

CVE-2022-28733  (opens in a new tab)
CWE-191  (opens in a new tab)

How to fix?

Upgrade Debian:13 grub2 to version 2.06-3 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream grub2 package and not the grub2 package as distributed by Debian. See How to fix? for Debian:13 relevant fixed versions and status.

Integer underflow in grub_net_recv_ip4_packets; A malicious crafted IP packet can lead to an integer underflow in grub_net_recv_ip4_packets() function on rsm->total_len value. Under certain circumstances the total_len value may end up wrapping around to a small integer number which will be used in memory allocation. If the attack succeeds in such way, subsequent operations can write past the end of the buffer.

CVSS Scores

version 3.1