Bugtraq mailing list archives
Re: Bug in scp v3.0.1
From: Brad Arlt <arlt () cpsc ucalgary ca>
Date: Wed, 31 Oct 2001 13:42:18 -0700
On Wed, Oct 31, 2001 at 12:18:47AM -0500, Jonathan A. Zdziarski wrote:
I was scp'ing a 2MB file to my home computer over a DSL line and just happened to run top at the same time. I immediately noticed this line: 13864 root 1 30 0 2884K 1744K run 0:38 42.00% sshd2 It appears that scp'ing a file over a slow connection causes the process to suck up a huge number of resources. There's most likely no usleep() somewhere it's needed. A couple scp's over slow connections could severely degrade the boxes performance. This test was performed on a Solaris 8_x86 machine.
If you are refering to SSH Communication Security Inc's SSH2 v3.0.1, this is a known bug, and they are working on the fix. It affects all server implimentations (UNIX and Windows). For a list of all the known bugs check out: http://www.ssh.com/faq/index.cfm?category=129 I get 99% utilization on a fast link (Cable modem, and 10/100/1000Mb Ethernet. ---------------------------------------------------------------------------- __o Bradley Arlt Email: arlt () cpsc ucalgary ca o__ _ \<_ WWW: www.acs.ucalgary.ca/~bdarlt _>/ _ (_)/(_) -Eat well, sleep peacefully, drink lots, and ride like hell. (_)\(_)
Current thread:
- Re: Bug in scp v3.0.1 Matt Forrest (Oct 31)
- <Possible follow-ups>
- Re: Bug in scp v3.0.1 Brad Arlt (Oct 31)
- Re: Bug in scp v3.0.1 Nate Eldredge (Oct 31)
- RE: Bug in scp v3.0.1 Jonathan A. Zdziarski (Oct 31)