Re: klogd 1.3-22 buffer overflow

From: Peter van Dijk (peterat_private)
Date: Wed Nov 11 1998 - 16:43:16 PST

  • Next message: Andrew Pitman: "Re: world-readable shadow backups in SuSe 5.2"

    --lrZ03NoBR/3+SXJZ
    Content-Type: text/plain; charset=us-ascii
    Content-Transfer-Encoding: quoted-printable
    
    On Wed, Nov 11, 1998 at 11:12:09AM -0500, Neil Bright wrote:
    > Michal Zalewski wrote the following:
    >=20
    > > Good morning,
    > >
    > > This time - buffer overflow in Linux klogd daemon from sysklogd-1.3
    > > package (up to release 22 - affects Red Hat 5.x and Slackware 3.x, no d=
    ata
    > > about other distributions).
    >=20
    > [snip]
    >=20
    > This does appear to affect a (fairly) stock RH5.2 box also.  In my test,
    > The supplied module code did cause klogd to die...
    >=20
    > Relevant RPMS:
    >   sysklogd-1.3-25
    >   kernel-2.0.36-0.7     (stock, no kernel rebuild)
    
    Same on Slackware 3.4 (kernel updated to 2.0.35).
    
    [root@koek] ~# klogd -v
    klogd 1.3-0
    
    But attaching gdb to klogd shows that the character the buffer is filled wi=
    th
    only appears in eax and even there only in the lowest 8 bits.. Is this still
    exploitable?
    
    Greetz, Peter.
    --=20
    'I guess anybody who walks away from a root shell at :         Peter van Di=
    jk
     a nerd party gets what they deserve!' -- BillSF     :peterat_private=
    nl
    -- --   -- --   -- --   -- --   -- --   -- --   -- --   -- --   -- --   -- =
    --
    finger hardbeat@flits104-161.flits.rug.nl for my public PGP-key
      -  ---  -  ---  -  ---  -  ---  -  ---  -  ---  -  ---  -  ---  -  ---  -
    
    --lrZ03NoBR/3+SXJZ
    Content-Type: application/pgp-signature
    
    -----BEGIN PGP SIGNATURE-----
    Version: PGPfreeware 5.0i for non-commercial use
    MessageID: 8NmZ8FDRmqWp1fcBFYDRTIjS97N9yD7/
    
    iQA/AwUBNkovImxoDwIx5CYIEQJT3gCbBuT73tjdI4kEs0d+QOT1tyYpQiwAoIdd
    6aMqLDlKzBlCH77T9E2x91Ya
    =T/rM
    -----END PGP SIGNATURE-----
    
    --lrZ03NoBR/3+SXJZ--
    



    This archive was generated by hypermail 2b30 : Fri Apr 13 2001 - 14:22:54 PDT