lists.openwall.net   lists  /  announce  owl-users  owl-dev  john-users  john-dev  passwdqc-users  yescrypt  popa3d-users  /  oss-security  kernel-hardening  musl  sabotage  tlsify  passwords  /  crypt-dev  xvendor  /  Bugtraq  Full-Disclosure  linux-kernel  linux-netdev  linux-ext4  PHC 
Open Source and information security mailing list archives
 
Hash Suite: Windows password security audit tool. GUI, reports in PDF.
[<prev] [next>] [day] [month] [year] [list]
From: appelast at drumnbass.art.pl (Karol Więsek)
Subject: ncpfs buffer overflow

-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1

There is buffer overflow in ncplogin and ncpmap in nwclient.c.


static void strcpy_cw(wchar_t *w, const char* s) {
~        while ((*w++ = *(const nuint8*)s++) != 0);
}

NWDSCCODE NWDSCreateContextHandleMnt(NWDSContextHandle* ctx, const
NWDSChar * treeName){
...
wchar_t wc_treeName[MAX_DN_CHARS+1];

~  if (!treeName)
~      return ERR_NULL_POINTER;

~  strcpy_cw (wc_treeName,treeName);

Currently i have not managed to successfully exploit this bug on x86.

How to reproduce :

ncplogin -T `perl -e '{print"a"x"330"}'`
ncpmap -T `perl -e '{print"a"x"330"}'` /

Tested on ncpfs-2.2.4-1 from fedora core 2

-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.2.4 (GNU/Linux)
Comment: Using GnuPG with Thunderbird - http://enigmail.mozdev.org

iD8DBQFBqxzaFTSet8AbQUQRAiycAJ4+5YDHawXMrXiu2wPHt6IRN2Xx0wCeM7vm
LpGHtO/7DHkoRO18OQwve4M=
=YwvU
-----END PGP SIGNATURE-----


Powered by blists - more mailing lists