Busybox

Busybox is used for several system utilities in OpenWrt.

Identify OpenWrt version through udhcp

When an OpenWrt system tries to obtain an IP using DHCP on its WAN interface, it adds a Vendor-Class option that contains the Busybox version:

Vendor-Class Option 60, length 12: “udhcp 1.28.3”

This can be used to estimate which OpenWrt version is running on a router if you don't have access to the router itself.

OpenWrt version Busybox version
7.06 1.4.2
7.07 1.4.2
7.09 1.4.2
8.09 1.11.2
8.09.1 1.11.2
8.09.2 1.11.2
10.03 1.15.3
10.03.1 1.15.3
12.09 1.19.4
17.01.0 1.25.1
17.01.1 1.25.1
17.01.2 1.25.1
17.01.3 1.25.1
17.01.4 1.25.1
17.01.5 1.25.1
17.01.6 1.25.1
17.01.7 1.25.1
18.06.0 1.28.3
18.06.1 1.28.3
18.06.2 1.28.4
18.06.3 1.28.4
18.06.4 1.28.4
18.06.5 1.28.4
19.07.0 1.30.1
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  • Last modified: 2019/11/11 09:30
  • by zorun