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Cisco Bug: CSCvi50061 - Evaluate NTP February 2018 Vulnerabilities.

Last Modified

Apr 18, 2019

Products (211)

  • Cisco IOS
  • Cisco Catalyst 3650-12X48UR-L Switch
  • Cisco Catalyst 3850-24P-L Switch
  • Cisco 812 CiFi Integrated Services Router
  • Cisco Catalyst 3850-24U-L Switch
  • Cisco Catalyst 3850-48XS-E Switch
  • Cisco Catalyst 3850-16XS-S Switch
  • Cisco Catalyst 3650-8X24UQ-E Switch
  • Cisco VG204XM Analog Voice Gateway
  • Cisco Catalyst 3850-24U-S Switch
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Known Affected Releases

15.6(3)M Denali-16.3.6

Description (partial)

This product includes a version of ntpd that is affected by the vulnerability identified by one or more of the following Common Vulnerability and 
Exposures (CVE) IDs:

CVE-2016-1549, CVE-2018-7182 , CVE-2018-7170, CVE-2018-7184, CVE-2018-7185 

This bug has been opened to address the potential impact on this product.

Device configured with NTP

CVE-2018-7182 / VU#961909: ctl_getitem(): buffer read overrun leads to undefined behavior and information leak
	This issue occurred due the fix of Bug 3008 / CVE-2016-2519 and cisco has own implementation for this API and won’t be impact on Cisco IOS/IOS-XE.

CVE-2018-7184 / VU#961909: Interleaved symmetric mode cannot recover from bad state
	This issue is regression with fix CVE-2015-8138 & CVE-2016-7431 and We have already addressed the issue correctly using the bug id CSCvc23569 

CVE-2018-7185 / VU#961909: Unauthenticated packet can reset authenticated interleaved association
	We have already addressed this issue with bug id CSCux99025 but it looks having the partial fix.

CVE-2018-7183 / VU#961909: ntpq:decodearr() can write beyond its buffer limit
	ntpq is not supported for cisco IOS/IOS-XE

CVE-2016-1549 / VU#961909: Sybil vulnerability: ephemeral association attack
LOW: Sec 3415 / CVE-2018-7170 / VU#961909: Multiple authenticated ephemeral associations
	Both CVE-2016-1549 & CVE-2018-7170 are similar issues and pending impact on cisco IOS/IOS-XE.
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