DEBIAN-CVE-2023-40547

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Source
https://security-tracker.debian.org/tracker/CVE-2023-40547
Import Source
https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2023-40547.json
JSON Data
https://api.osv.dev/v1/vulns/DEBIAN-CVE-2023-40547
Upstream
Published
2024-01-25T16:15:07Z
Modified
2025-09-30T05:16:09.199376Z
Severity
  • 8.3 (High) CVSS_V3 - CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H CVSS Calculator
Summary
[none]
Details

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.

References

Affected packages

Debian:11 / shim

Package

Name
shim
Purl
pkg:deb/debian/shim?arch=source

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
15.8-1~deb11u1

Affected versions

15.*

15.4-7
15.6-1~deb10u1
15.6-1~deb11u1
15.6-1
15.7-1~deb10u1
15.7-1~deb11u1
15.7-1
15.8-1~deb10u1

Ecosystem specific 

{
    "urgency": "not yet assigned"
}

Debian:12 / shim

Package

Name
shim
Purl
pkg:deb/debian/shim?arch=source

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
15.8-1~deb12u1

Affected versions

15.*

15.7-1
15.8-1~deb10u1
15.8-1~deb11u1

Ecosystem specific 

{
    "urgency": "not yet assigned"
}

Debian:13 / shim

Package

Name
shim
Purl
pkg:deb/debian/shim?arch=source

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
15.8-1

Ecosystem specific 

{
    "urgency": "not yet assigned"
}

Debian:14 / shim

Package

Name
shim
Purl
pkg:deb/debian/shim?arch=source

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
15.8-1

Ecosystem specific 

{
    "urgency": "not yet assigned"
}