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Security Advisory zebra security update

Advisory: RHSA-2003:305-12
Type: Security Advisory
Severity: Important
Issued on: 2003-11-12
Last updated on: 2003-11-12
Affected Products: Red Hat Enterprise Linux AS (v. 2.1)
Red Hat Linux Advanced Workstation 2.1 for the Itanium Processor
CVEs (cve.mitre.org): CVE-2003-0795
CVE-2003-0858

Details

Updated zebra packages that close a locally-exploitable and a
remotely-exploitable denial of service vulnerability are now available.

Zebra an open source implementation of TCP/IP routing software.

Jonny Robertson reported that Zebra can be remotely crashed if a Zebra
password has been enabled and a remote attacker can connect to the Zebra
telnet management port. The Common Vulnerabilities and Exposures project
(cve.mitre.org) has assigned the name CAN-2003-0795 to this issue.

Herbert Xu reported that Zebra can accept spoofed messages sent on the
kernel netlink interface by other users on the local machine. This could
lead to a local denial of service attack. The Common Vulnerabilities and
Exposures project (cve.mitre.org) has assigned the name CAN-2003-0858 to
this issue.

Users of Zebra should upgrade to these erratum packages, which contain
a patch preventing Zebra from crashing when it receives a telnet option
delimiter without any option data, and a patch that checks that netlink
messages actually came from the kernel.


Solution

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

To update all RPMs for your particular architecture, run:

rpm -Fvh [filenames]

where [filenames] is a list of the RPMs you wish to upgrade. Only those
RPMs which are currently installed will be updated. Those RPMs which are
not installed but included in the list will not be updated. Note that you
can also use wildcards (*.rpm) if your current directory *only* contains the
desired RPMs.

Please note that this update is also available via Red Hat Network. Many
people find this an easier way to apply updates. 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.

If up2date fails to connect to Red Hat Network due to SSL
Certificate Errors, you need to install a version of the
up2date client with an updated certificate. The latest version of
up2date is available from the Red Hat FTP site and may also be
downloaded directly from the RHN website:

https://rhn.redhat.com/help/latest-up2date.pxt

Updated packages

Red Hat Enterprise Linux AS (v. 2.1)

SRPMS:
zebra-0.91a-10.21AS.src.rpm
File outdated by:  RHSA-2006:0533
    MD5: 4a647dfdafc97b05182faefd19aee0ce
zebra-0.91a-10.21AS.src.rpm
File outdated by:  RHSA-2006:0533
    MD5: 4a647dfdafc97b05182faefd19aee0ce
 
IA-32:
zebra-0.91a-10.21AS.i386.rpm
File outdated by:  RHSA-2006:0533
    MD5: dababbbc942e8bd5fadbf13c51dce9d3
 
IA-64:
zebra-0.91a-10.21AS.ia64.rpm
File outdated by:  RHSA-2006:0533
    MD5: a52d9c275693b2a177acb5e249d8e464
 
Red Hat Linux Advanced Workstation 2.1 for the Itanium Processor

SRPMS:
zebra-0.91a-10.21AS.src.rpm
File outdated by:  RHSA-2006:0533
    MD5: 4a647dfdafc97b05182faefd19aee0ce
zebra-0.91a-10.21AS.src.rpm
File outdated by:  RHSA-2006:0533
    MD5: 4a647dfdafc97b05182faefd19aee0ce
 
IA-64:
zebra-0.91a-10.21AS.ia64.rpm
File outdated by:  RHSA-2006:0533
    MD5: a52d9c275693b2a177acb5e249d8e464
 

Bugs fixed (see bugzilla for more information)

107538 - CAN-2003-0795 Zebra remote DoS


References


Keywords

DoS


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/