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[ GLSA 200512-06 ] Ethereal: Buffer overflow in OSPF protocol dissector
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GLSA
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PostPosted: Thu Dec 15, 2005 5:42 am    Post subject: [ GLSA 200512-06 ] Ethereal: Buffer overflow in OSPF protoco Reply with quote

Gentoo Linux Security Advisory

Title: Ethereal: Buffer overflow in OSPF protocol dissector (GLSA 200512-06)
Severity: high
Exploitable: remote
Date: December 14, 2005
Bug(s): #115030
ID: 200512-06

Synopsis

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

Background

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.

Affected Packages

Package: net-analyzer/ethereal
Vulnerable: < 0.10.13-r2
Unaffected: >= 0.10.13-r2
Architectures: All supported architectures


Description

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.

Impact

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.

Workaround

There is no known workaround at this time.

Resolution

All Ethereal users should upgrade to the latest version:
Code:
# emerge --sync
# emerge --ask --oneshot --verbose ">=net-analyzer/ethereal-0.10.13-r2"


References

CVE-2005-3651
iDEFENSE Advisory


Last edited by GLSA on Sun May 07, 2006 4:59 pm; edited 1 time in total
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