Administrative takeover via reusable NSDP authentication token
Published Mar 10, 2021 · Updated Aug 4, 2024
Authentication token reuse in NETGEAR JGS516PE and GS116Ev2 2.6.0.43 allows man-in-the-middle attackers to gain administrative access. NSDP command 0x17 fails to invalidate the random value used for a password hash after each command, allowing one captured hash to authorize repeated write requests. Exploitation requires interception of an authenticated NSDP packet on the local network; the replayed token permits arbitrary administrative actions on the switch.
Summary
What happened
Authentication token reuse in NETGEAR JGS516PE and GS116Ev2 2.6.0.43 allows man-in-the-middle attackers to gain administrative access. NSDP command 0x17 fails to invalidate the random value used for a password hash after each command, allowing one captured hash to authorize repeated write requests. Exploitation requires interception of an authenticated NSDP packet on the local network; the replayed token permits arbitrary administrative actions on the switch.
The record
- CVE
- CVE-2020-35229
- Published
- Mar 10, 2021
- Updated
- Aug 4, 2024
- Vendor
- Unknown vendor
- Product
- Unknown product
- Classifications
- T1550.001
- Attack vector
- adjacent
- Privileges
- unauthenticated
Timeline
How it unfolded
- Mar 10, 2021CVE publishedPublication date reported by the CVE source.
- Aug 4, 2024Record updatedLatest update available in the CVE record.
Exploitability
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