oss-sec mailing list archives
Re: vsftpd download backdoored
From: Chris Evans <scarybeasts () gmail com>
Date: Wed, 6 Jul 2011 22:48:17 -0700
On Mon, Jul 4, 2011 at 9:04 PM, HD Moore <hdm () digitaloffense net> wrote:
On 7/4/2011 10:58 PM, Solar Designer wrote:What mirror? As far as I'm aware, from the announcement by Chris, only the official distribution site for vsftpd was compromised.[ snip ]Maybe. Do you have a copy of the backdoored tarball? I don't, and no one on forums where I saw this discussed appears to have it (which confirms that it existed for a very short period of time only).This copy is backdoored and has mtime Feb-15-2011. Chris didn't reply when I asked him for a copy from his master (old/vsftpd-2.3.4.tar.gz).
Yeah, on vacation at the moment but looks like you found a good alternative? FWIW, https://docs. Google.com/leaf?id=0B-_usSLlqH60Y2QwZDM0YWEtYWY0My00NmM5LWI3NDAtY2Y0MzRiOTg5ZGJm&hl=en_US Seems strange to me that the attacker would remember to update mtime on the replacement tarball, but leave .o files kicking around (thus also changing tarball size radically). Cheers Chris
http://download.polytechnic.edu.na/pub2/vsftpd/vsftpd-2.3.4.tar.gzAre you trying to say that Debian got the backdoored copy? This is news to me.No, I am saying that for this to become as widespread as the mtime in the mirror above indicates, it would be incredible for distros like Debian to not notice it, as they verify the hash of the tarball. This indicates that the mtime in the mirror above was forged (since the hash is indeed wrong), but the real question is how this mirror obtained the copy. Was the mirror compromised? Was a rsync job used against the real server, in which case the mtime was preserved? I couldn't find any public copies with the backdoored checksum, but one of the metasploit contributors pointed me to the link above. I would like to believe the exposure was limited to 1-3 days, but the mirror above casts doubt on this. -HD
Current thread:
- Re: vsftpd download backdoored, (continued)
- Re: vsftpd download backdoored Eugene Teo (Jul 04)
- Re: vsftpd download backdoored Solar Designer (Jul 04)
- Re: vsftpd download backdoored HD Moore (Jul 04)
- Re: vsftpd download backdoored Solar Designer (Jul 04)
- Re: vsftpd download backdoored HD Moore (Jul 04)
- Re: vsftpd download backdoored Solar Designer (Jul 04)
- Re: vsftpd download backdoored Solar Designer (Jul 04)
- Re: vsftpd download backdoored HD Moore (Jul 04)
- Re: vsftpd download backdoored Solar Designer (Jul 04)
- Re: vsftpd download backdoored Matthias Andree (Jul 05)
- Re: vsftpd download backdoored Chris Evans (Jul 06)
- Re: vsftpd download backdoored Eugene Teo (Jul 05)
- Re: vsftpd download backdoored Solar Designer (Jul 05)
- Re: vsftpd download backdoored Josh Bressers (Jul 11)