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AUSCERT External Security Bulletin Redistribution
ESB-2017.1812
Cisco ASR 5000 Series Aggregation Services Routers
24 July 2017
===========================================================================
AusCERT Security Bulletin Summary
---------------------------------
Product: Cisco ASR 5000 Series Aggregation Services Routers
Publisher: Cisco Systems
Operating System: Cisco
Impact/Access: Unauthorised Access -- Remote/Unauthenticated
Reduced Security -- Remote/Unauthenticated
Resolution: Patch/Upgrade
CVE Names: CVE-2017-6672 CVE-2017-6612
Original Bulletin:
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20170719-asr
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20170719-asr1
Comment: This bulletin contains two (2) security advisories.
- --------------------------BEGIN INCLUDED TEXT--------------------
Cisco Security Advisory
Cisco ASR 5000 Series Aggregation Services Routers GGSN Gateway Redirect
Vulnerability
Medium
Advisory ID: cisco-sa-20170719-asr
First Published: 2017 July 19 16:00 GMT
Version 1.0: Final
Workarounds: No workarounds available
Cisco Bug IDs:
CSCvc67927
CVSS Score:
Base 5.8, Temporal 5.8
Base 5.8, Temporal 5.8
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:N/E:X/RL:X/RC:X
CVE-2017-6612
CWE-119
Summary
A vulnerability in the gateway GPRS support node (GGSN) of Cisco ASR 5000
Series Aggregation Services Routers could allow an unauthenticated, remote
attacker to redirect HTTP traffic sent to an affected device.
The vulnerability exists because the affected device does not sufficiently
validate HTTP traffic that contains one or more packets with additional bytes
at the end of the packet. An attacker could exploit this vulnerability by
changing the properties of a payload in HTTP traffic that is sent to an
affected device. A successful exploit could allow the attacker to pipeline
requests through an affected device without verifying and accounting for the
requests.
There are no workarounds that address this vulnerability.
This advisory is available at the following link:
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20170719-asr
Affected Products
Vulnerable Products
This vulnerability affects Cisco ASR 5000 Series Aggregation Services Routers.
For information about affected software releases, consult the Cisco bug ID(s)
at the top of this advisory.
Products Confirmed Not Vulnerable
No other Cisco products are currently known to be affected by this
vulnerability.
Workarounds
There are no workarounds that address this vulnerability.
Fixed Software
For information about fixed software releases, consult the Cisco bug ID(s) at
the top of this advisory.
When considering software upgrades, customers are advised to regularly consult
the advisories for Cisco products, which are available from the Cisco Security
Advisories and Alerts page, to determine exposure and a complete upgrade
solution.
In all cases, customers should ensure that the devices to be upgraded contain
sufficient memory and confirm that current hardware and software
configurations will continue to be supported properly by the new release. If
the information is not clear, customers are advised to contact the Cisco
Technical Assistance Center (TAC) or their contracted maintenance providers.
Exploitation and Public Announcements
The Cisco Product Security Incident Response Team (PSIRT) is not aware of any
public announcements or malicious use of the vulnerability that is described
in this advisory.
URL
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20170719-asr
Revision History
Version Description Section Status Date
1.0 Initial public release. -- Final 2017-July-19
LEGAL DISCLAIMER
THIS DOCUMENT IS PROVIDED ON AN "AS IS" BASIS AND DOES NOT IMPLY ANY KIND OF
GUARANTEE OR WARRANTY, INCLUDING THE WARRANTIES OF MERCHANTABILITY OR FITNESS
FOR A PARTICULAR USE. YOUR USE OF THE INFORMATION ON THE DOCUMENT OR MATERIALS
LINKED FROM THE DOCUMENT IS AT YOUR OWN RISK. CISCO RESERVES THE RIGHT TO
CHANGE OR UPDATE THIS DOCUMENT AT ANY TIME.
A standalone copy or paraphrase of the text of this document that omits the
distribution URL is an uncontrolled copy and may lack important information or
contain factual errors. The information in this document is intended for end
users of Cisco products.
===
Cisco Security Advisory
Cisco ASR 5000 Series Aggregation Services Routers Access Control List
Security Bypass Vulnerability
Medium
Advisory ID: cisco-sa-20170719-asr1
First Published: 2017 July 19 16:00 GMT
Version 1.0: Final
Workarounds: No workarounds available
Cisco Bug IDs:
CSCvb99022
CSCvc16964
CSCvc37351
CVSS Score:
Base 5.3, Temporal 5.3
Base 5.3, Temporal 5.3
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N/E:X/RL:X/RC:X
CVE-2017-6672
CWE-264
Summary
A vulnerability in certain filtering mechanisms of access control lists (ACLs)
for Cisco ASR 5000 Series Aggregation Services Routers could allow an
unauthenticated, remote attacker to bypass ACL rules that have been configured
for an affected device.
The vulnerability exists because the affected device fails to inspect and
match certain traffic that meets the criteria defined in ACL rules configured
for the device. An attacker could exploit this vulnerability by sending
crafted HTTP packets to an affected device. A successful exploit could allow
the attacker to bypass certain sets of rules defined in ACLs for the affected
device.
There are no workarounds that address this vulnerability.
This advisory is available at the following link:
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20170719-asr1
Affected Products
Vulnerable Products
This vulnerability affects Cisco ASR 5000 Series Aggregation Services Routers.
For information about affected software releases, consult the Cisco bug ID(s)
at the top of this advisory.
Products Confirmed Not Vulnerable
No other Cisco products are currently known to be affected by this
vulnerability.
Workarounds
There are no workarounds that address this vulnerability.
Fixed Software
For information about fixed software releases, consult the Cisco bug ID(s) at
the top of this advisory.
When considering software upgrades, customers are advised to regularly consult
the advisories for Cisco products, which are available from the Cisco Security
Advisories and Alerts page, to determine exposure and a complete upgrade
solution.
In all cases, customers should ensure that the devices to be upgraded contain
sufficient memory and confirm that current hardware and software
configurations will continue to be supported properly by the new release. If
the information is not clear, customers are advised to contact the Cisco
Technical Assistance Center (TAC) or their contracted maintenance providers.
Exploitation and Public Announcements
The Cisco Product Security Incident Response Team (PSIRT) is not aware of any
public announcements or malicious use of the vulnerability that is described
in this advisory.
URL
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20170719-asr1
Revision History
Version Description Section Status Date
1.0 Initial public release. -- Final 2017-July-19
LEGAL DISCLAIMER
THIS DOCUMENT IS PROVIDED ON AN "AS IS" BASIS AND DOES NOT IMPLY ANY KIND OF
GUARANTEE OR WARRANTY, INCLUDING THE WARRANTIES OF MERCHANTABILITY OR FITNESS
FOR A PARTICULAR USE. YOUR USE OF THE INFORMATION ON THE DOCUMENT OR MATERIALS
LINKED FROM THE DOCUMENT IS AT YOUR OWN RISK. CISCO RESERVES THE RIGHT TO
CHANGE OR UPDATE THIS DOCUMENT AT ANY TIME.
A standalone copy or paraphrase of the text of this document that omits the
distribution URL is an uncontrolled copy and may lack important information or
contain factual errors. The information in this document is intended for end
users of Cisco products.
- --------------------------END INCLUDED TEXT--------------------
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