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osvGoogleOSV:CVE-2023-40547
HistoryJan 25, 2024 - 4:15 p.m.

CVE-2023-40547

2024-01-2516:15:07
Google
osv.dev
9
vulnerability
remote code execution
shim boot support
out-of-bounds write
system compromise
http request
early boot phase
man-in-the-middle
compromise
software

8.3 High

CVSS3

Attack Vector

ADJACENT

Attack Complexity

HIGH

Privileges Required

NONE

User Interaction

NONE

Scope

CHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H

9.7 High

AI Score

Confidence

High

0.025 Low

EPSS

Percentile

90.3%

JSON

A remote code execution vulnerability was found in Shim. The Shim boot support trusts attacker-controlled values when parsing an HTTP response. This flaw allows an attacker to craft a specific malicious HTTP request, leading to a completely controlled out-of-bounds write primitive and complete system compromise. This flaw is only exploitable during the early boot phase, an attacker needs to perform a Man-in-the-Middle or compromise the boot server to be able to exploit this vulnerability successfully.

CPENameOperatorVersion
shimeq15
shimeq0.7
shimeq12
shimeq15.6
shimeq15.7
shimeqshim-15.3-rc4
shimeq0.5
shimeq0.8
shimeqshim-15.3-rc2
shimeq11
Rows per page:
1-10 of 231

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8.3 High

CVSS3

Attack Vector

ADJACENT

Attack Complexity

HIGH

Privileges Required

NONE

User Interaction

NONE

Scope

CHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H

9.7 High

AI Score

Confidence

High

0.025 Low

EPSS

Percentile

90.3%

JSON
Related for OSV:CVE-2023-40547
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