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…
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (2.39%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
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.
- CVSS 2.0
- 7.5 HIGHAV:N/AC:L/Au:N/C:P/I:P/A:P
- EPSS
- 2.39% probability · 83th percentile
- CISA KEV
- Not listed
- Affected
- extended interior gateway routing protocol/extended interior gateway routing protocol
- Source
- cve@mitre.org
References
- http://lists.grok.org.uk/pipermail/full-disclosure/2005-December/040332.htmlVendor Advisory
- http://marc.info/?l=full-disclosure&m=113504451523186&w=2
- http://securityreason.com/securityalert/274
- http://securitytracker.com/id?1015382
- http://www.securityfocus.com/archive/1/419830/100/0/threaded
- http://www.securityfocus.com/archive/1/419898/100/0/threaded
- http://www.securityfocus.com/bid/15970
- http://www.vupen.com/english/advisories/2005/3008
- https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A5741
- http://lists.grok.org.uk/pipermail/full-disclosure/2005-December/040332.htmlVendor Advisory
- http://marc.info/?l=full-disclosure&m=113504451523186&w=2
- http://securityreason.com/securityalert/274
- http://securitytracker.com/id?1015382
- http://www.securityfocus.com/archive/1/419830/100/0/threaded
- http://www.securityfocus.com/archive/1/419898/100/0/threaded
- http://www.securityfocus.com/bid/15970
- http://www.vupen.com/english/advisories/2005/3008
- https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A5741
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.