CVE-2014-5380: Grand MA 300 allows retrieval of the access PIN from sniffed data.

PriorityP354high7.5CVSS 3.1

AVNACLPRNUINSUCHINAN

EXPLOIT

EPSS

4.34%

90.0th percentile

Grand MA 300 allows retrieval of the access PIN from sniffed data.

Affected

1 ranges

Vendor	Product	Version range	Fixed in
granding	grand_ma300_firmware	—	—

Detection & IOCsextracted from sources · hover to see the quote

→The encoded PIN on the wire is XOR'd with magic value 0x4F534B5A and a derived gettickcount byte (third byte forced to 0x5A before XOR); monitor for this decoding pattern to identify active exploitation or tooling. ↗
→Grand MA 300 firmware version 6.60 is confirmed vulnerable; flag devices running this firmware version on the network for immediate review. ↗
→Attackers may follow PIN sniffing with brute-force attacks; monitor for repeated UDP traffic matching the 0x4E 0x04 signature toward Grand MA 300 devices. ↗

·The PIN decoding algorithm depends on the connection ID (cid) and a gettickcount value embedded in the packet; the example uses cid=0 and a sample wire value of 0x4B00A987, which are specific to the captured session and will differ per device/session. ↗

CVSS provenance

nvdv3.17.5HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

nvdv2.05.0MEDIUMAV:N/AC:L/Au:N/C:P/I:N/A:N

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