Description
Integer signedness error in the i386_set_ldt call in FreeBSD 5.5, and possibly earlier versions down to 5.2, allows local users to cause a denial of service (crash) via unspecified arguments that use negative signed integers to cause the bzero function to be called with a large length parameter, a different vulnerability than CVE-2006-4172.
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
- FreeBSD 5.x - 'I386_Set_LDT()' Multiple Local Denial of Service Vulnerabilities EDB-28648 · dos · Sep 23, 2006 · verified
Sources: PoC-in-GitHub, Metasploit Framework, Exploit-DB — updated daily. Only links are listed; no exploit code is hosted here.
References
- 1016927 vdb-entry
- 22064 third-party-advisory
- 20158 vdb-entry
- 20060923 FreeBSD i386_set_ldt Integer Signedness Vulnerability third-party-advisory
- 20060925 iDefense Security Advisory 09.23.06: FreeBSD i386_set_ldt Integer Signedness Vulnerability mailing-list