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Integer Underflow Affecting grub2 package, versions <2.04-150200.9.63.2

0.0
high

Snyk CVSS

    Attack Complexity Low
    User Interaction Required
    Confidentiality High
    Integrity High
    Availability High

    Threat Intelligence

    EPSS 0.06% (27th percentile)
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NVD
8.1 high
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SUSE
8.8 high
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Red Hat
8.1 high

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  • Snyk ID SNYK-SLES152-GRUB2-2870869
  • published 15 Jun 2022
  • disclosed 14 Jun 2022
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Introduced: 14 Jun 2022

CVE-2022-28733 Open this link in a new tab
CWE-191 Open this link in a new tab

How to fix?

Upgrade SLES:15.2 grub2 to version 2.04-150200.9.63.2 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 SLES. See How to fix? for SLES:15.2 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.

References