Import Source
https://github.com/microsoft/AzureLinuxVulnerabilityData/blob/main/osv/AZL-34030.json
JSON Data
https://api.test.osv.dev/v1/vulns/AZL-34030
Upstream
Published
2024-01-25T16:15:07Z
Modified
2026-04-01T05:11:20.459659Z
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
CVE-2023-40547 affecting package shim for versions less than 15.8-1
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

Azure Linux:2 / shim

Package

Name
shim
Purl
pkg:rpm/azure-linux/shim

Affected ranges

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

Database specific

source
"https://github.com/microsoft/AzureLinuxVulnerabilityData/blob/main/osv/AZL-34030.json"