Home page logo

oss-sec logo oss-sec mailing list archives

Re: radvd 1.8.2 released with security fixes
From: Reuben Hawkins <reubenhwk () gmail com>
Date: Fri, 14 Oct 2011 06:58:56 -0700

On Wed, Oct 12, 2011 at 3:09 AM, Vasiliy Kulikov <segoon () openwall com> wrote:
On Tue, Oct 11, 2011 at 23:26 -0700, Reuben Hawkins wrote:
On Sat, Oct 8, 2011 at 9:55 AM, Vasiliy Kulikov <segoon () openwall com> wrote:
Crap, thank you for noticing it, guys.  The fix should be:


Now, "", "..", "." and filenames with "/" inside are denied.

In case someone didn't fully track the discussion thread, I'll sum it up -

In the original patch the variable name is typoed/confused - the check
should be against "iface" instead of "name".  The check against "name"
is totally wrong as it checks a static hint string, which always passes
the check.

The confused blacklisted iface set is a bug, but not a security bug;
the confused variable name is indeed a security bug (not a flaw per se,
but it greatly weakens the privsep model).

Thanks to Solar Designer for pointing out that this thing is probably
not clear to everybody.

Vasiliy Kulikov
http://www.openwall.com - bringing security into open computing environments

radvd-1.8.3 posted.

  By Date           By Thread  

Current thread:
[ Nmap | Sec Tools | Mailing Lists | Site News | About/Contact | Advertising | Privacy ]