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Ethereal: Buffer overflow in OSPF protocol dissector


1.  Gentoo Linux Security Advisory

Version Information

Advisory Reference GLSA 200512-06 / Ethereal
Release Date December 14, 2005
Latest Revision December 14, 2005: 01
Impact high
Exploitable remote
Package Vulnerable versions Unaffected versions Architecture(s)
net-analyzer/ethereal < 0.10.13-r2 >= 0.10.13-r2 All supported architectures

Related bugreports: #115030


Ethereal is missing bounds checking in the OSPF protocol dissector that could lead to abnormal program termination or the execution of arbitrary code.

2.  Impact Information


Ethereal is a feature-rich network protocol analyzer. It provides protocol analyzers for various network flows, including one for Open Shortest Path First (OSPF) Interior Gateway Protocol.


iDEFENSE reported a possible overflow due to the lack of bounds checking in the dissect_ospf_v3_address_prefix() function, part of the OSPF protocol dissector.


An attacker might be able to craft a malicious network flow that would crash Ethereal. It may be possible, though unlikely, to exploit this flaw to execute arbitrary code with the permissions of the user running Ethereal, which could be the root user.

3.  Resolution Information


There is no known workaround at this time.


All Ethereal users should upgrade to the latest version:

Code Listing 3.1: Resolution

# emerge --sync
# emerge --ask --oneshot --verbose ">=net-analyzer/ethereal-0.10.13-r2"

4.  References


Page updated December 14, 2005

Summary: This is a Gentoo Linux Security Advisory

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