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Category:   Application (Generic)  >   hztty Vendors:   Zhang, Yongguang
(Debian Issues Fix) hztty Buffer Overflows Let Local Users Gain Elevated Privileges
SecurityTracker Alert ID:  1007757
SecurityTracker URL:  http://securitytracker.com/id/1007757
CVE Reference:   CVE-2003-0783   (Links to External Site)
Updated:  Jun 14 2008
Original Entry Date:  Sep 19 2003
Impact:   Execution of arbitrary code via local system, Root access via local system
Fix Available:  Yes  Vendor Confirmed:  Yes  

Description:   Two buffer overflow vulnerabilities were reported in 'hztty'. A local user can execute arbitrary code to gain elevated privileges.

It is reported that on some systems, hztty may be configured with set user id (setuid) root user privileges. On those systems, a local user can execute arbitrary code with root privileges.

The nature of the buffer overflow flaws was not disclosed.

Impact:   A local user can execute arbitrary code with root privileges.
Solution:   Debian has released a fix for the stable distribution (woody) in version 2.0-5.2woody1 and for the unstable distribution (sid) in the pending version 2.0-6.

Debian GNU/Linux 3.0 alias woody:

Source archives:

http://security.debian.org/pool/updates/main/h/hztty/hztty_2.0-5.2woody1.dsc
Size/MD5 checksum: 560 ade09c908df6e49f68b5565bc9deed7b
http://security.debian.org/pool/updates/main/h/hztty/hztty_2.0-5.2woody1.diff.gz
Size/MD5 checksum: 3799 41baafd52655cf29ba344844b20d5635
http://security.debian.org/pool/updates/main/h/hztty/hztty_2.0.orig.tar.gz
Size/MD5 checksum: 229189 7ec5907ad55825780274b8a77b217e21

Alpha architecture:

http://security.debian.org/pool/updates/main/h/hztty/hztty_2.0-5.2woody1_alpha.deb
Size/MD5 checksum: 153682 792436d6241caf9ed0f84d46eb7adbf0

ARM architecture:

http://security.debian.org/pool/updates/main/h/hztty/hztty_2.0-5.2woody1_arm.deb
Size/MD5 checksum: 149582 5e4f10714ff728bdc78109546e6a471f

Intel IA-32 architecture:

http://security.debian.org/pool/updates/main/h/hztty/hztty_2.0-5.2woody1_i386.deb
Size/MD5 checksum: 149174 527fcdc48e8fd94db9aeeff1aeae1cfd

Intel IA-64 architecture:

http://security.debian.org/pool/updates/main/h/hztty/hztty_2.0-5.2woody1_ia64.deb
Size/MD5 checksum: 156842 4887f3b937c0c19bcbf16f1334fd545c

HP Precision architecture:

http://security.debian.org/pool/updates/main/h/hztty/hztty_2.0-5.2woody1_hppa.deb
Size/MD5 checksum: 153142 275d3fd6af0e1c5fcb56115471e832eb

Motorola 680x0 architecture:

http://security.debian.org/pool/updates/main/h/hztty/hztty_2.0-5.2woody1_m68k.deb
Size/MD5 checksum: 148908 0afe3dc146fe516a090ceeb8efed8310

Big endian MIPS architecture:

http://security.debian.org/pool/updates/main/h/hztty/hztty_2.0-5.2woody1_mips.deb
Size/MD5 checksum: 152414 009dfc06d43eddc92829c46c914b2d4e

Little endian MIPS architecture:

http://security.debian.org/pool/updates/main/h/hztty/hztty_2.0-5.2woody1_mipsel.deb
Size/MD5 checksum: 152488 331b8f3a232024fbbef9a9ad826a2ad9

PowerPC architecture:

http://security.debian.org/pool/updates/main/h/hztty/hztty_2.0-5.2woody1_powerpc.deb
Size/MD5 checksum: 150156 1079ca383c253bce3b7949a618cc4d28

IBM S/390 architecture:

http://security.debian.org/pool/updates/main/h/hztty/hztty_2.0-5.2woody1_s390.deb
Size/MD5 checksum: 150668 899a29ef01281669243cc49c6be15b03

Sun Sparc architecture:

http://security.debian.org/pool/updates/main/h/hztty/hztty_2.0-5.2woody1_sparc.deb
Size/MD5 checksum: 153624 fedf0fb0846b7cf7be1a9c1b33d3ee57

Vendor URL:  www.debian.org/security/ (Links to External Site)
Cause:   Boundary error
Underlying OS:  Linux (Debian)
Underlying OS Comments:  3.0

Message History:   This archive entry is a follow-up to the message listed below.
Sep 19 2003 hztty Buffer Overflows Let Local Users Gain Elevated Privileges



 Source Message Contents

Subject:  [SECURITY] [DSA-385-1] New hztty packages fix buffer overflows



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

- --------------------------------------------------------------------------
Debian Security Advisory DSA 385-1                     security@debian.org
http://www.debian.org/security/                             Matt Zimmerman
September 18th, 2003                    http://www.debian.org/security/faq
- --------------------------------------------------------------------------

Package        : hztty
Vulnerability  : buffer overflows
Problem-Type   : local
Debian-specific: no
CVE Ids        : CAN-2003-0783

Jens Steube reported a pair of buffer overflow vulnerabilities in
hztty, a program to translate Chinese character encodings in a
terminal session.  These vulnerabilities could be exploited by a local
attacker to gain root privileges on a system where hztty is installed.

Additionally, hztty had been incorrectly installed setuid root, when
it only requires the privileges of group utmp.  This has also been
corrected in this update.

For the stable distribution (woody) this problem has been fixed in
version 2.0-5.2woody1.

For the unstable distribution (sid) this problem will befixed in
version 2.0-6.

We recommend that you update your hztty package.

Upgrade Instructions
- --------------------

wget url
        will fetch the file for you
dpkg -i file.deb
        will install the referenced file.

If you are using the apt-get package manager, use the line for
sources.list as given below:

apt-get update
        will update the internal database
apt-get upgrade
        will install corrected packages

You may use an automated update by adding the resources from the
footer to the proper configuration.

Debian GNU/Linux 3.0 alias woody
- --------------------------------

  Source archives:

    http://security.debian.org/pool/updates/main/h/hztty/hztty_2.0-5.2woody1.dsc
      Size/MD5 checksum:      560 ade09c908df6e49f68b5565bc9deed7b
    http://security.debian.org/pool/updates/main/h/hztty/hztty_2.0-5.2woody1.diff.gz
      Size/MD5 checksum:     3799 41baafd52655cf29ba344844b20d5635
    http://security.debian.org/pool/updates/main/h/hztty/hztty_2.0.orig.tar.gz
      Size/MD5 checksum:   229189 7ec5907ad55825780274b8a77b217e21

  Alpha architecture:

    http://security.debian.org/pool/updates/main/h/hztty/hztty_2.0-5.2woody1_alpha.deb
      Size/MD5 checksum:   153682 792436d6241caf9ed0f84d46eb7adbf0

  ARM architecture:

    http://security.debian.org/pool/updates/main/h/hztty/hztty_2.0-5.2woody1_arm.deb
      Size/MD5 checksum:   149582 5e4f10714ff728bdc78109546e6a471f

  Intel IA-32 architecture:

    http://security.debian.org/pool/updates/main/h/hztty/hztty_2.0-5.2woody1_i386.deb
      Size/MD5 checksum:   149174 527fcdc48e8fd94db9aeeff1aeae1cfd

  Intel IA-64 architecture:

    http://security.debian.org/pool/updates/main/h/hztty/hztty_2.0-5.2woody1_ia64.deb
      Size/MD5 checksum:   156842 4887f3b937c0c19bcbf16f1334fd545c

  HP Precision architecture:

    http://security.debian.org/pool/updates/main/h/hztty/hztty_2.0-5.2woody1_hppa.deb
      Size/MD5 checksum:   153142 275d3fd6af0e1c5fcb56115471e832eb

  Motorola 680x0 architecture:

    http://security.debian.org/pool/updates/main/h/hztty/hztty_2.0-5.2woody1_m68k.deb
      Size/MD5 checksum:   148908 0afe3dc146fe516a090ceeb8efed8310

  Big endian MIPS architecture:

    http://security.debian.org/pool/updates/main/h/hztty/hztty_2.0-5.2woody1_mips.deb
      Size/MD5 checksum:   152414 009dfc06d43eddc92829c46c914b2d4e

  Little endian MIPS architecture:

    http://security.debian.org/pool/updates/main/h/hztty/hztty_2.0-5.2woody1_mipsel.deb
      Size/MD5 checksum:   152488 331b8f3a232024fbbef9a9ad826a2ad9

  PowerPC architecture:

    http://security.debian.org/pool/updates/main/h/hztty/hztty_2.0-5.2woody1_powerpc.deb
      Size/MD5 checksum:   150156 1079ca383c253bce3b7949a618cc4d28

  IBM S/390 architecture:

    http://security.debian.org/pool/updates/main/h/hztty/hztty_2.0-5.2woody1_s390.deb
      Size/MD5 checksum:   150668 899a29ef01281669243cc49c6be15b03

  Sun Sparc architecture:

    http://security.debian.org/pool/updates/main/h/hztty/hztty_2.0-5.2woody1_sparc.deb
      Size/MD5 checksum:   153624 fedf0fb0846b7cf7be1a9c1b33d3ee57

  These files will probably be moved into the stable distribution on
  its next revision.

- ---------------------------------------------------------------------------------
For apt-get: deb http://security.debian.org/ stable/updates main
For dpkg-ftp: ftp://security.debian.org/debian-security dists/stable/updates/main
Mailing list: debian-security-announce@lists.debian.org
Package info: `apt-cache show <pkg>' and http://packages.debian.org/<pkg>
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Version: GnuPG v1.2.3 (GNU/Linux)

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A9f3n0Nu0FuyN5w39IzB0U4=
=rqEJ
-----END PGP SIGNATURE-----


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