CVE-2005-4437

Description

MD5 Neighbor Authentication in Extended Interior Gateway Routing Protocol (EIGRP) 1.2, as implemented in Cisco IOS 11.3 and later, does not include the Message Authentication Code (MAC) in the checksum, which allows remote attackers to sniff message hashes and (1) replay EIGRP HELLO messages or (2) cause a denial of service by sending a large number of spoofed EIGRP neighbor announcements, which results in an ARP storm on the local network.

7.5

CVSS

Severity: High

CVSS 2.0 •

EPSS 3.47% Top 15%

Vendor Advisory org.uk

Affected: n/a n/a

References

Link	Tags
http://www.vupen.com/english/advisories/2005/3008	vdb entry
http://www.securityfocus.com/archive/1/419830/100/0/threaded	mailing list
http://www.securityfocus.com/bid/15970	vdb entry
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A5741	vdb entry signature
http://www.securityfocus.com/archive/1/419898/100/0/threaded	mailing list
http://securityreason.com/securityalert/274	third party advisory
http://marc.info/?l=full-disclosure&m=113504451523186&w=2	mailing list
http://securitytracker.com/id?1015382	vdb entry
http://lists.grok.org.uk/pipermail/full-disclosure/2005-December/040332.html	mailing list vendor advisory

Frequently Asked Questions

What is the severity of CVE-2005-4437?: CVE-2005-4437 has been scored as a high severity vulnerability.
How to fix CVE-2005-4437?: To fix CVE-2005-4437, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2005-4437 being actively exploited in the wild?: It is possible that CVE-2005-4437 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~3% probability that this vulnerability will be exploited by malicious actors in the next 30 days.

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