pxe security update

Advisory:	RHSA-2002:165-06
Type:	Security Advisory
Severity:	Important
Issued on:	2002-07-31
Last updated on:	2002-08-29
Affected Products:	Red Hat Enterprise Linux AS (v. 2.1)
OVAL:	N/A
CVEs (cve.mitre.org):	CVE-2002-0835

Details

Updated PXE packages are now available for Red Hat Linux Advanced Server
which fix a vulnerability that can crash the PXE server using certain
DHCP packets.

The PXE package contains the PXE (Preboot eXecution Environment)
server and code needed for Linux to boot from a boot disk image on a
Linux PXE server.

It was found that the PXE server could be crashed using DHCP packets from
some Voice Over IP (VOIP) phones. This bug could be used to cause a denial
of service (DoS) attack on remote systems by using malicious packets.

Users of PXE on Red Hat Linux Advanced Server are advised to upgrade to the
new release which contains a version of PXE that is not vulnerable to this
issue.

Solution

Before applying this update, make sure all previously released errata
relevant to your system have been applied.

Please note that this update is available via Red Hat Network. To use Red
Hat Network, launch the Red Hat Update Agent with the following command:

up2date

This will start an interactive process that will result in the appropriate
RPMs being upgraded on your system.

Updated packages

Red Hat Enterprise Linux AS (v. 2.1)

SRPMS:
pxe-0.1-31.99.7.3.src.rpm	`fb0aac937bdb8a13cc22a8aa6254cfc7`

IA-32:
pxe-0.1-31.99.7.3.i386.rpm	`391d65eb419642d2e5d57507b1b8546e`

(The unlinked packages above are only available from the Red Hat Network)

Bugs fixed (see bugzilla for more information)

63945 - PXE does not work on servers
66825 - DHCP packets from Cisco VOIP phone crash pxe server

References

http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2002-0835

Keywords

(VOIP), DHCP, IP, Over, packets, phones, PXE, pxe, Voice,

These packages are GPG signed by Red Hat for security. Our key and details on how to verify the signature are available from:
https://www.redhat.com/security/team/key/#package

The Red Hat security contact is secalert@redhat.com. More contact details at http://www.redhat.com/security/team/contact/