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2 vulnerabilities found for efibootguard by siemens

CVE-2023-39950 (GCVE-0-2023-39950)

Vulnerability from nvd – Published: 2023-08-14 20:17 – Updated: 2024-10-01 18:24
VLAI
Title
Insufficient input validation in efibootguard
Summary
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.
Severity
6.1 (Medium)
CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:C/C:N/I:H/A:L
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
  • CWE-20 - Improper Input Validation
Assigner
References
Impacted products
Vendor Product Version
siemens efibootguard Affected: < 0.15
Create a notification for this product.
Show details on NVD website
To clipboard 

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CVE-2023-39950 (GCVE-0-2023-39950)

Vulnerability from cvelistv5 – Published: 2023-08-14 20:17 – Updated: 2024-10-01 18:24
VLAI
Title
Insufficient input validation in efibootguard
Summary
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.
Severity
6.1 (Medium)
CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:C/C:N/I:H/A:L
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
  • CWE-20 - Improper Input Validation
Assigner
References
Impacted products
Vendor Product Version
siemens efibootguard Affected: < 0.15
Create a notification for this product.
Show details on NVD website
To clipboard 

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