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CVE-2005-4437

UnknownEPSS 2.39%

Last modified

CVE-2005-4437 is a vulnerability of currently unknown severity. 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.. EPSS estimates a 2.39% chance of exploitation in the next 30 days.

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.

Metrics

EPSS Probability
2.39%

81.8th percentile

Probability of exploitation in the next 30 days. Learn more

Affected Software

VendorProductVersions
Extended Interior Gateway Routing ProtocolExtended Interior Gateway Routing Protocol1.2

References

Timeline

Published
Last Modified
Status
Modified

Frequently Asked Questions

What is CVE-2005-4437?
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.
How severe is CVE-2005-4437?
Severity scoring for CVE-2005-4437 is pending analysis. The EPSS model estimates a 2.39% probability of exploitation in the next 30 days.
How do I fix CVE-2005-4437?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

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Source: NVD / NIST