Common Vulnerabilities and Exposures assigned an identifier CVE-2013-2488 to the following vulnerability:

The DTLS dissector in Wireshark 1.6.x before 1.6.14 and 1.8.x before 1.8.6 does not validate the fragment offset before invoking the reassembly state machine, which allows remote attackers to cause a denial of service (application crash) via a large offset value that triggers write access to an invalid memory location.

References:
[1] http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2013-2488
[2] http://anonsvn.wireshark.org/viewvc?view=revision&revision=48011
[3] http://www.wireshark.org/docs/relnotes/wireshark-1.6.14.html
[4] http://www.wireshark.org/docs/relnotes/wireshark-1.8.6.html
[5] http://www.wireshark.org/security/wnpa-sec-2013-22.html
[6] https://bugs.wireshark.org/bugzilla/show_bug.cgi?id=8380