abartlet at samba.org
Mon Jul 28 23:42:11 GMT 2003
On Tue, 2003-07-29 at 06:29, Javid Abdul-AJAVID1 wrote:
> Sorry to bother technical group, but I have been looking for this for long.
> Any body knows the vulnerability for "nt-netbios-nullsession".
> Samba runs in domain mode/heterogenous enviroment here. Ver 2.2.8a on solaris ( in windows domain )
> Security is major concern in our corp here.
> Is there fix out ther for null sessions.
Null sessions are only an issue in that they allow information leakage.
You can find out user-names that are valid on the system. In most
organisations, this is available anyway, so you don't actually gain much
- but that doesn't stop those with the power to impose such
> Will this escape the ISS (security scans ) for "nt-netbios-nullsession"
> restrict anonymous = yes.
Only in Samba 3.0 - and it causes samba to be unable to perform a number
of roles on the network - in particular, you cannot be a DC, or
particpate in browsing. In Samba 3.0 that option is an integer
'restrict anonymous = 2' does not permit the null user to connect to
Andrew Bartlett abartlet at pcug.org.au
Manager, Authentication Subsystems, Samba Team abartlet at samba.org
Student Network Administrator, Hawker College abartlet at hawkerc.net
http://samba.org http://build.samba.org http://hawkerc.net
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