Bug 15917

Summary: Maksimum packetlength checked badly (Local DoS)
Product: [Retired] Red Hat Linux Reporter: Need Real Name <oh3mqu+rpm>
Component: tracerouteAssignee: Crutcher Dunnavant <crutcher>
Status: CLOSED ERRATA QA Contact:
Severity: medium Docs Contact:
Priority: medium    
Version: 6.2CC: pekkas
Target Milestone: ---   
Target Release: ---   
Hardware: i386   
OS: Linux   
Whiteboard:
Fixed In Version: Doc Type: Bug Fix
Doc Text:
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Clone Of: Environment:
Last Closed: 2000-08-14 07:46:37 UTC Type: ---
Regression: --- Mount Type: ---
Documentation: --- CRM:
Verified Versions: Category: ---
oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
Embargoed:

Description Need Real Name 2000-08-10 12:40:29 UTC 
If you give packet length with (second) command line parameter, the
traceroute checks the maximum size of packet before assigning the given
value to variable. So you can get traceroute to allocate huge block of
memory, and becouse traceroute is suid program ulimits of users don't
affect. => Normal user can use all of the memory and makes the machine
swapping.

Patchfile and fixed source- and binary-rpm-file is available at
http://vernon.teraflops.com/rpm/

Ari Saastamoinen
Comment 1 Pekka Savola 2000-08-14 07:46:35 UTC 
This happens in RHL 7.0 beta too.  It drops the privileges earlier though.
Comment 2 Jeff Johnson 2000-10-04 19:22:22 UTC 
Fixed (by adding patch) in traceroute-1.4a5-24. Thanks for the patch.