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Cisco Bug: CSCur02734 - IOS-XE evaluation for CVE-2014-6271 and CVE-2014-7169

Last Modified

Jan 27, 2017

Products (1)

  • Cisco ASR 1000 Series Aggregation Services Routers

Known Affected Releases

15.2(4)S 15.2(4)S6 15.3(3)S 15.3(3)S4 15.4(1)S 15.4(1)S2 15.4(2)S 15.4(2)S1 15.4(3)S

Description (partial)

Symptom:
The following Cisco products running IOS-XE software

Cisco ASR 1000 Series Aggregation Services Router
Cisco ASR 920 Series Aggregation Services Router
Cisco ASR 900 Series Aggregation Services Router
Cisco 4400 Series Integrated Services Routers
Cisco 4300 Series Integrated Services Routers
Cisco Cloud Services Router 1000V Series

include a version of bash that is affected by the vulnerabilities identified by the Common Vulnerability and Exposures (CVE) IDs:

CVE-2014-6271 
CVE-2014-6277
CVE-2014-6278
CVE-2014-7169
CVE-2014-7186
CVE-2014-7187

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

Conditions:
In all version before the Known Fixed Releases with either

The Persistent SSH feature enabled
The Persistent telnet feature enabled

Information on the Persistent SSH & persistent telnet feature is available on :

http://www.cisco.com/c/en/us/td/docs/routers/asr1000/configuration/guide/chassis/asrswcfg/Console_Telnet_SSH_Handling.html#pgfId-1057023

The Persistent SSH or Persistent telnet feature is only available on the Management interface (GigabitEthernet0) in the VRF Mgmt-intf.

With Persistent SSH, a user must first successfully log in and authenticate via SSH to trigger this vulnerability.
With Persistent telnet, an unauthenticated user can exploit this vulnerability

Other conditions may exist.  This release note will be updated if other attack vectors are discovered.
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Bug Details Include

  • Full Description (including symptoms, conditions and workarounds)
  • Status
  • Severity
  • Known Fixed Releases
  • Related Community Discussions
  • Number of Related Support Cases
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