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CVE-2022-28734— Out-of-bounds write when handling split HTTP headers

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存在缓冲区错误漏洞，该漏洞源于处理拆分HTTP header时出现越界写入。

CVSS 8.1 · High EPSS 1.12% · P65

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application
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I. Basic Information for CVE-2022-28734

Vulnerability Information
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Vulnerability Title
Out-of-bounds write when handling split HTTP headers
Source: CVE Program / CVE List V5
Vulnerability Description
Out-of-bounds write when handling split HTTP headers; When handling split HTTP headers, GRUB2 HTTP code accidentally moves its internal data buffer point by one position. This can lead to a out-of-bound write further when parsing the HTTP request, writing a NULL byte past the buffer. It's conceivable that an attacker controlled set of packets can lead to corruption of the GRUB2's internal memory metadata.
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
N/A
Source: CVE Program / CVE List V5
Vulnerability Title
grub2 缓冲区错误漏洞
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存在缓冲区错误漏洞，该漏洞源于处理拆分HTTP header时出现越界写入。
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-2022-28734

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III. Intelligence Information for CVE-2022-28734

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Vendor Advisories for CVE-2022-28734 (2)

Mailing List Discussions for CVE-2022-28734 (1)

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

CVE-2022-28733 8.1 HIGH Integer underflow in grub_net_recv_ip4_packets
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

V. Comments for CVE-2022-28734

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