Description
DHCP on Linksys BEFSR11, BEFSR41, BEFSR81, and BEFSRU31 Cable/DSL Routers, firmware version 1.45.7, does not properly clear previously used buffer contents in a BOOTP reply packet, which allows remote attackers to obtain sensitive information.
Public exploits
Exploit or proof-of-concept code for this vulnerability is publicly available, which lowers the bar for attackers. Treat it as a reason to patch sooner.
Third-party code, not reviewed by us. Public PoCs are sometimes fake or contain malware. Read the code first and run it only in an isolated lab, against systems you are authorised to test.
Exploit-DB 1
- Linksys - DHCP Information Disclosure EDB-24115 · remote · May 31, 2004 · verified
Sources: PoC-in-GitHub, Metasploit Framework, Exploit-DB — updated daily. Only links are listed; no exploit code is hosted here.
References
- http://linksys.custhelp.com/cgi-bin/linksys.cfg/php/enduser/std_adp.php?p_faqid=832&p_%20%5Ccreated=1086294093&p_sid=pU1X1idh&p_lva=&p_sp=cF9zcmNoPSZwX3NvcnRfYnk9JnBfZ3JpZHNvcnQ9%20%5CJnBfcm93X2NudD02NTQmcF9wYWdlPTE%2A&p_li=
- linksys-etherfast-bootp-dos(16142) vdb-entry
- 11606 third-party-advisory
- 6325 vdb-entry
- 1010288 vdb-entry
- 20040607 Linksys BEFSR41 DHCP vulnerability server leaks network data mailing-list
- 10329 vdb-entry