See the URL for very detailed information and exploit. I tried to add this as an attachment to bug 45543 but there seems to be a problem with Bugzilla accepting attachments.
I guess ethereal 0.10.0 to 0.10.2 should be masked in Portage ASAP since the full-disclosure mail already contains a real world exploit.
Steps to Reproduce:
the IGAP overflow was one of the 13 discovered in the earlier ethereal vuln. report (see 45543 for details) Is this vuln. somehow different? AFAICS, they're the same (fixed by the same version, etc.)
Inlcined to close as a dupe. Please clarify if this should not be the case.
this is fixed in ethereal 0.10.3.
*** This bug has been marked as a duplicate of 45543 ***