Bug 538462

Summary:	net-analyzer/dsniff - invalid calculation of Total Length header field in macof.c
Product:	Gentoo Linux	Reporter:	jan.starke
Component:	Current packages	Assignee:	Gentoo Netmon project <netmon>
Status:	RESOLVED FIXED
Severity:	normal	CC:	jan.starke
Priority:	Normal	Keywords:	PATCH
Version:	unspecified
Hardware:	All
OS:	Linux
Whiteboard:
Package list:		Runtime testing required:	---
Attachments:	dsniff-2.4_beta1-r6/macof.c

Description jan.starke 2015-02-01 19:18:33 UTC

Created attachment 395338 [details, diff]
dsniff-2.4_beta1-r6/macof.c

Hi,

I observed that macof (package dsniff) does not include the size of the IP header in its calculation of the Total Length field.

I sent an email to the author of dsniff about this issue, but I received no answer. So I published a description of the problem (https://janstarke.wordpress.com/2015/02/01/invalid-tcp-segments-created-by-macof/)

Attached to this bug you find a patch which resolves this problem.

Kind regards, Jan

Comment 1 Jeroen Roovers (RETIRED) gentoo-dev

2015-02-07 10:16:23 UTC

This patch went into -r7. Thanks for the report and patch.