Unauthenticated code execution via PB-ADV buffer overwrite
Published Sep 18, 2024 · Updated Sep 19, 2024
Buffer overflow in BTstack mesh before 864e2f2b6b7878c8fab3cf5ee84ae566e3380c58 allows remote attackers to execute code via a malformed PB-ADV PDU. In pb_adv_handle_transaction_cont, an attacker-controlled segment number produces an offset as high as 135, and memcpy writes fragment data past the 100-byte pb_adv_msg_in_buffer without a complete bounds check. An unauthenticated, physically proximate BLE mesh device must reach an active PB-ADV provisioning procedure; successful exploitation can crash the provisioner or overwrite adjacent state for code execution.
Summary
What happened
Buffer overflow in BTstack mesh before 864e2f2b6b7878c8fab3cf5ee84ae566e3380c58 allows remote attackers to execute code via a malformed PB-ADV PDU. In pb_adv_handle_transaction_cont, an attacker-controlled segment number produces an offset as high as 135, and memcpy writes fragment data past the 100-byte pb_adv_msg_in_buffer without a complete bounds check. An unauthenticated, physically proximate BLE mesh device must reach an active PB-ADV provisioning procedure; successful exploitation can crash the provisioner or overwrite adjacent state for code execution.
The record
- CVE
- CVE-2024-40568
- Published
- Sep 18, 2024
- Updated
- Sep 19, 2024
- Vendor
- Unknown vendor
- Product
- Unknown product
- Classifications
- CWE-120, T1210
- Attack vector
- adjacent
- Privileges
- unauthenticated
Timeline
How it unfolded
- Sep 18, 2024CVE publishedPublication date reported by the CVE source.
- Sep 19, 2024Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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What is affected?
Affected products and versions are unavailable in this record.
Published CVSS scores
CVSS describes severity. EPSS estimates exploitation probability.
Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Weakness, pattern, technique
Public exploit references
- BTstack malformed PB-ADV PDU proof of conceptproof of concept · unverified
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Technologies
Your stack
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Your stack
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