Wireshark LWRES Dissector getaddrsbyname_request Buffer Overflow

The LWRES dissector in Wireshark version 0.9.15 through 1.0.10 and 1.2.0 through 1.2.5 allows remote attackers to execute arbitrary code due to a stack-based buffer overflow. This bug found and reported by babi. This particular exploit targets the dissect_getaddrsbyname_request function. Several other functions also contain potentially exploitable stack-based buffer overflows. The Windows version (of 1.2.5 at least) is compiled with /GS, which prevents exploitation via the return address on the stack. Sending a larger string allows exploitation using the SEH bypass method. However, this packet will usually get fragmented, which may cause additional complications. NOTE: The vulnerable code is reached only when the packet dissection is rendered. If the packet is fragmented, all fragments must be captured and reassembled to exploit this issue.

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Exploit Rank

• Great

Exploit Authors

• babi < >
• jduck < jduck [at] metasploit.com >
• redsand < >

Vulnerability References

• CVE-2010-0304
• OSVDB-61987
• BID-37985
• http://www.wireshark.org/security/wnpa-sec-2010-02.html
• http://anonsvn.wireshark.org/viewvc/trunk-1.2/epan/dissectors/packet-lwres.c?...

Exploit Targets

• 0 - tshark 1.0.2-3+lenny7 on Debian 5.0.3 (x86)
• 1 - wireshark 1.0.2-3+lenny7 on Debian 5.0.3 (x86)
• 2 - wireshark 1.2.5 on RHEL 5.4 (x64)
• 3 - wireshark 1.2.5 on Mac OS X 10.5 (x86)
• 4 - wireshark/tshark 1.2.1 and 1.2.5 on Windows (x86)

Exploit Development

• Source Code
• History

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• exploit/multi/misc/wireshark_lwres_getaddrbyname_loop
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Exploit Usage Information

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