CVE-2023-39950

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Source
https://nvd.nist.gov/vuln/detail/CVE-2023-39950
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2023-39950.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2023-39950
Aliases
  • GHSA-j6pp-7g99-24m7
Related
Published
2023-08-14T21:15:13Z
Modified
2024-09-18T03:27:13.291414Z
Severity
  • 5.2 (Medium) CVSS_V3 - CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:L CVSS Calculator
Summary
[none]
Details

efibootguard is a simple UEFI boot loader with support for safely switching between current and updated partition sets. Insufficient or missing validation and sanitization of input from untrustworthy bootloader environment files can cause crashes and probably also code injections into bg_setenv) or programs using libebgenv. This is triggered when the affected components try to modify a manipulated environment, in particular its user variables. Furthermore, bg_printenv may crash over invalid read accesses or report invalid results. Not affected by this issue is EFI Boot Guard's bootloader EFI binary. EFI Boot Guard release v0.15 contains required patches to sanitize and validate the bootloader environment prior to processing it in userspace. Its library and tools should be updated, so should programs statically linked against it. An update of the bootloader EFI executable is not required. The only way to prevent the issue with an unpatched EFI Boot Guard version is to avoid accesses to user variables, specifically modifications to them.

References

Affected packages

Debian:12 / efibootguard

Package

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

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
0.13-2+deb12u1

Affected versions

0.*

0.13-2
0.13-2+deb12u1~bpo11+1

Ecosystem specific 

{
    "urgency": "not yet assigned"
}

Debian:13 / efibootguard

Package

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

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
0.15-1

Affected versions

0.*

0.13-2

Ecosystem specific 

{
    "urgency": "not yet assigned"
}