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CVE-2022-28733

Public on 2022-07-05
Modified on 2024-02-01
Description

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.

Severity
Important
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CVSS v3 Base Score
8.1
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Affected Packages

Platform Package Release Date Advisory
Amazon Linux 2 - Core grub2 2023-07-17 17:40 ALAS2-2023-2146
Amazon Linux 2023 grub2 2023-02-17 20:43 ALAS2023-2023-020

CVSS Scores

Score Type Score Vector
Amazon Linux CVSSv3 8.1 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
NVD CVSSv3 8.1 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

References

Red Hat: CVE-2022-28733 Mitre: CVE-2022-28733 FAQs regarding Amazon Linux ALAS/CVE Severity