PT-2022-16996 · Silicon · Gecko Bootloader

Published 2022-11-02 · Updated 2022-11-03 · CVE-2022-24936

Positive Technologies (AI Summary)

CVSS v3.1

9.1

Critical

Base vector

AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H

Name of the Vulnerable Software and Affected Versions Silicon Labs Gecko Bootloader versions 4.0.1 and earlier

Description The issue is related to an Out-of-Bounds error in the GBL parser, which allows an attacker to overwrite the flash Sign key and OTA decryption key via a malicious bootloader upgrade.

Recommendations For Silicon Labs Gecko Bootloader versions 4.0.1 and earlier, consider restricting access to bootloader upgrades to minimize the risk of exploitation until a patch is available. As a temporary workaround, avoid using the vulnerable GBL parser function until a fix is provided.

Exploit

Fix

Memory Corruption

Buffer Overflow

Weakness Enumeration

CWE-787

CWE-119

Related Identifiers

CVE-2022-24936

Affected Products

Gecko Bootloader

References · 5

• 🔥 https://github.com/SiliconLabs/gecko_sdk/blame/2e82050dc8823c9fe0e8908c1b2666fb83056230/platform/bootloader/core/btl_bootload.c · Exploit
• https://osv.dev/vulnerability/CVE-2022-24936 · Vendor Advisory
• https://community.silabs.com/sfc/servlet.shepherd/document/download/0698Y00000Gdop4QAB?operationContext=S1 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2022-24936 · Security Note
• https://t.me/cibsecurity/52492 · Telegram Post