The dissect_frame function in epan/dissectors/packet-frame.c in the frame metadissector in Wireshark 1.10.x before 1.10.8 interprets a negative integer as a length value even though it was intended to represent an error condition, which allows remote attackers to cause a denial of service (application crash) via a crafted packet.

References

• https://nvd.nist.gov/vuln/detail/CVE-2014-4020
• https://bugs.wireshark.org/bugzilla/show_bug.cgi?id=10030
• https://bugs.wireshark.org/bugzilla/show_bug.cgi?id=9999
• https://code.wireshark.org/review/gitweb?p=wireshark.git;a=commit;h=beb119f911a698d44f4baa06d888bb1e775983bc
• http://lists.opensuse.org/opensuse-updates/2014-06/msg00049.html
• http://www.wireshark.org/security/wnpa-sec-2014-07.html