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Cisco Bug: CSCvf36258 - Cisco IOS and IOS XE Software HTTP Client Information Disclosure Vulnerability

Last Modified

Dec 02, 2020

Products (14)

  • Cisco 2600 Series Multiservice Platforms
  • Cisco 1000 Series Integrated Services Routers
  • Cisco Catalyst 9500 Series Switches
  • Cisco Catalyst 3850 Series Switches
  • Cisco Catalyst 3650 Series Switches
  • Cisco Catalyst 9800 Series Wireless Controllers
  • Cisco Catalyst 9600 Series Switches
  • Cisco 4000 Series Integrated Services Routers
  • Cisco Catalyst 9200 Series Switches
  • Cisco ASR 1000 Series Aggregation Services Routers
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Known Affected Releases

15.6(2)T FD-1.5.0

Description (partial)

Symptom:
A vulnerability in the HTTP client feature of Cisco IOS and IOS XE Software could allow an unauthenticated, remote attacker to read and modify data that should normally have been sent via an encrypted channel.

The vulnerability is due to TCP port information not being considered when matching new requests to existing, persistent HTTP connections. An attacker could exploit this vulnerability by acting as a man-in-the-middle and then reading and/or modifying data that should normally have been sent through an encrypted channel.

Cisco has released software updates that address this vulnerability. There are no workarounds that address this vulnerability.

Cisco has published a security advisory containing additional details which is available at the following link:
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190925-http-client

Conditions:
For information on fixed versions of software consult the Cisco IOS Software checker:
https://tools.cisco.com/security/center/softwarechecker.x 

See Vulnerable Products Section of the advisory for full details:
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190925-http-client#vp
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Bug Details Include

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