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Q1What is this vulnerability? (Essence + Consequences)
๐จ **Essence**: A buffer overflow in Meshtastic firmware when processing invalid protobuf data. ๐ฅ **Consequences**: Remote Code Execution (RCE) is possible.โฆ
๐ก๏ธ **Root Cause**: **CWE-119** (Improper Restriction of Operations within Memory Bounds). The flaw lies in how the system handles mesh packets with invalid protobuf data, leading to a buffer overflow.
Q3Who is affected? (Versions/Components)
๐ฆ **Affected**: **Meshtastic Firmware** versions **prior to 2.6.2**. ๐ก Specifically, devices rebroadcasting packets on the default channel are at risk.
Q4What can hackers do? (Privileges/Data)
๐ **Attacker Capabilities**: Full **Remote Code Execution**. ๐ต๏ธโโ๏ธ No authentication is needed. The attacker can potentially take full control of the device's execution flow.
Q5Is exploitation threshold high? (Auth/Config)
๐ **Exploitation Threshold**: **LOW**. โ No Auth required. โ No User Interaction required. โ๏ธ Only requires the target device to rebroadcast packets on the default channel.
Q6Is there a public Exp? (PoC/Wild Exploitation)
๐ **Public Exploit**: **YES**. A PoC is available on GitHub: [CVE-2025-24797 PoC](https://github.com/Alainx277/CVE-2025-24797). Discovered via fuzzing (ASAN abort).
Q7How to self-check? (Features/Scanning)
๐ **Self-Check**: Check your Meshtastic firmware version. ๐ If version < **2.6.2**, you are vulnerable. ๐ก Ensure you are not using default channels if possible, but patching is the only real fix.
Q8Is it fixed officially? (Patch/Mitigation)
๐ฉน **Official Fix**: **YES**. Update to **Meshtastic Firmware v2.6.2** or later. ๐ See [GitHub Security Advisory](https://github.com/meshtastic/firmware/security/advisories/GHSA-33hw-xhfh-944r) for details.
Q9What if no patch? (Workaround)
๐ง **No Patch Workaround**: Change default channel settings to avoid rebroadcasting on vulnerable channels. ๐ However, this is not a complete mitigation; **patching is strongly recommended**.
Q10Is it urgent? (Priority Suggestion)
โก **Urgency**: **CRITICAL**. ๐จ CVSS Score indicates High Impact (C:H, A:H). ๐โโ๏ธ Immediate patching required due to low exploitation barrier and RCE potential.