High severity · published Mar 21, 2017
CVE-2017-3849
A vulnerability in the Autonomic Networking Infrastructure (ANI) registrar feature of Cisco IOS Software (possibly 15.2 through 15.6) and Cisco IOS XE Software (possibly 3.7…
7.4
CVSS
0.8%
EPSS
No
On KEV
Description
A vulnerability in the Autonomic Networking Infrastructure (ANI) registrar feature of Cisco IOS Software (possibly 15.2 through 15.6) and Cisco IOS XE Software (possibly 3.7 through 3.18, and 16) could allow an unauthenticated, adjacent attacker to cause a denial of service (DoS) condition. The vulnerability is due to incomplete input validation on certain crafted packets. An attacker could exploit this vulnerability by sending a crafted autonomic network channel discovery packet to a device that has all the following characteristics: (1) running a Cisco IOS Software or Cisco IOS XE Software release that supports the ANI feature; (2) configured as an autonomic registrar; (3) has a whitelist configured. An exploit could allow the attacker to cause the affected device to reload. Note: Autonomic networking should be configured with a whitelist. Do not remove the whitelist as a workaround. Cisco Bug IDs: CSCvc42717.
CVSS vector
CVSS:3.0/AV:A/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H
Attack vector
Adjacent
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
None
Integrity
None
Availability
High
Scope
Changed
Exploitation
Is it being used?
Exploit prediction (EPSS)0.8% · higher than 55% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
IX
IOS XE · Cisco
3.7.0e; 3.7.1e; 3.7.2e; 3.7.3e; 3.7.4e; 3.7.5e; +34 more · source: NVD
IO
Ios · Cisco
15.2(3)e; 15.2(3)e1; 15.2(3)e2; 15.2(3)e3; 15.2(4)e; 15.2(4)e1; +34 more · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2017-3849
CVE.org
https://www.cve.org/CVERecord?id=CVE-2017-3849
Third Party Advisory
http://www.securityfocus.com/bid/96972
www.securitytracker.com
http://www.securitytracker.com/id/1038064
Vendor Advisory
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20170320-ani
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