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Home » Hacking News » EnGarde ESA-20030321-010: integer overflow in XDR RPC libraries

EnGarde ESA-20030321-010: integer overflow in XDR RPC libraries

by Nikola Strahija on March 23rd, 2003 The xdrmem XDR stream object does incorrect bounds-checking. If the bounds-checking error is exploited, it may be possible for an attacker to send maliciously formatted messages.


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+------------------------------------------------------------------------+
| EnGarde Secure Linux Security Advisory March 21, 2003 |
| http://www.engardelinux.org/ ESA-20030321-010 |
| |
| Package: glibc |
| Summary: RPC XDR decoder vulnerability. |
+------------------------------------------------------------------------+

EnGarde Secure Linux is a secure distribution of Linux that features
improved access control, host and network intrusion detection, Web
based secure remote management, e-commerce, and integrated open source
security tools.

OVERVIEW
- --------
This update fixes an integer overflow in the xdrmem_getbytes() function
of glibc.

The Common Vulnerabilities and Exposures project (cve.mitre.org) has
assigned the name CAN-2003-0028 to this issue.

All users are recommended to upgrade as soon as soon as possible.

SOLUTION
- --------
Users of the EnGarde Professional edition can use the Guardian Digital
Secure Network to update their systems automatically.

EnGarde Community users should upgrade to the most recent version
as outlined in this advisory. Updates may be obtained from:

ftp://ftp.engardelinux.org/pub/engarde/stable/updates/
http://ftp.engardelinux.org/pub/engarde/stable/updates/

Before upgrading the package, the machine must either:

a) be booted into a "standard" kernel; or
b) have LIDS disabled.

To disable LIDS, execute the command:

# /sbin/lidsadm -S -- -LIDS_GLOBAL

To install the updated package, execute the command:

# rpm -Uvh files

You must now update the LIDS configuration by executing the command:

# /usr/sbin/config_lids.pl

To re-enable LIDS (if it was disabled), execute the command:

# /sbin/lidsadm -S -- +LIDS_GLOBAL

To verify the signatures of the updated packages, execute the command:

# rpm -Kv files

UPDATED PACKAGES
- ----------------
These updated packages are for EnGarde Secure Linux Community
Edition.

Source Packages:

SRPMS/glibc-2.1.3-1.0.7.src.rpm
MD5 Sum: 82227d98df4975ac5c60e0ac10914747

Binary Packages:

i386/glibc-2.1.3-1.0.7.i386.rpm
MD5 Sum: 555c7d9d0f43887fe1c2ddf16eb1555b

REFERENCES
- ----------
Guardian Digital's public key:
http://ftp.engardelinux.org/pub/engarde/ENGARDE-GPG-KEY

glibc's Official Web Site:
http://www.gnu.org/software/glibc/

Security Contact: [email protected]
EnGarde Advisories: http://www.engardelinux.org/advisories.html

- --------------------------------------------------------------------------
$Id: ESA-20030321-010-glibc,v 1.2 2003/03/21 15:33:36 rwm Exp $
- --------------------------------------------------------------------------
Author: Ryan W. Maple
Copyright 2003, Guardian Digital, Inc.

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