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CVE-2022-28733— Integer underflow in grub_net_recv_ip4_packets

Quick assessment

Affected
GNU Project GNU GRUB
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

grub2是美国GNU社区的一款Linux系统引导程序。 grub2存在数字错误漏洞，该漏洞源于grub_net_recv_ip4_packets整数下溢。

CVSS 8.1 · High EPSS 1.27% · P69

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application
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I. Basic Information for CVE-2022-28733

Vulnerability Information
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Vulnerability Title
Integer underflow in grub_net_recv_ip4_packets
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
整数下溢(超界折返)
Source: CVE Program / CVE List V5
Vulnerability Title
grub2 数字错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
grub2是美国GNU社区的一款Linux系统引导程序。 grub2存在数字错误漏洞，该漏洞源于grub_net_recv_ip4_packets整数下溢。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
GNU Project GNU GRUB 0 ~ 2.06-3 -

II. Public POCs for CVE-2022-28733

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III. Intelligence Information for CVE-2022-28733

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Vendor Advisories for CVE-2022-28733 (2)

Mailing List Discussions for CVE-2022-28733 (1)

Same Patch Batch · GNU Project · 2023-07-20 · 4 CVEs total

CVE-2022-28734 8.1 HIGH Out-of-bounds write when handling split HTTP headers
CVE-2022-28735 6.7 MEDIUM grub2 数据伪造问题漏洞
CVE-2022-28736 6.4 MEDIUM There's a use-after-free vulnerability in grub_cmd_chainloader() function

IV. Related Vulnerabilities

Same product: GNU GRUB
Same vendor: GNU Project
Same weakness: CWE-191

V. Comments for CVE-2022-28733

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