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AUSCERT External Security Bulletin Redistribution
ESB-2021.2481
Cisco SD-WAN Software Information Disclosure Vulnerability
22 July 2021
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AusCERT Security Bulletin Summary
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Product: Cisco SD-WAN Software
Publisher: Cisco Systems
Operating System: Cisco
Impact/Access: Access Confidential Data -- Remote/Unauthenticated
Reduced Security -- Remote/Unauthenticated
Resolution: Patch/Upgrade
CVE Names: CVE-2021-1614
Original Bulletin:
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-sdw-mpls-infodisclos-MSSRFkZq
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Cisco SD-WAN Software Information Disclosure Vulnerability
Priority: Medium
Advisory ID: cisco-sa-sdw-mpls-infodisclos-MSSRFkZq
First Published: 2021 July 21 16:00 GMT
Version 1.0: Final
Workarounds: No workarounds available
Cisco Bug IDs: CSCvu28403
CVE Names: CVE-2021-1614
CWEs: CWE-126
Summary
o A vulnerability in the Multiprotocol Label Switching (MPLS) packet handling
function of Cisco SD-WAN Software could allow an unauthenticated, remote
attacker to gain access to information stored in MPLS buffer memory.
This vulnerability is due to insufficient handling of malformed MPLS
packets that are processed by a device that is running Cisco SD-WAN
Software. An attacker could exploit this vulnerability by sending a crafted
MPLS packet to an affected device that is running Cisco SD-WAN Software or
Cisco SD-WAN vManage Software. A successful exploit could allow the
attacker to gain unauthorized access to sensitive information.
Cisco has released software updates that address this vulnerability. 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-sdw-mpls-infodisclos-MSSRFkZq
Affected Products
o Vulnerable Products
At the time of publication, this vulnerability affected Cisco SD-WAN
Software.
For information about which Cisco software releases are vulnerable, see the
Fixed Software section of this advisory. See the Details section in the bug
ID(s) at the top of this advisory for the most complete and current
information.
Products Confirmed Not Vulnerable
Only products listed in the Vulnerable Products section of this advisory
are known to be affected by this vulnerability.
Cisco has confirmed that this vulnerability does not affect Cisco IOS XE
SD-WAN Software.
Workarounds
o There are no workarounds that address this vulnerability.
Fixed Software
o When considering software upgrades , customers are advised to regularly
consult the advisories for Cisco products, which are available from the
Cisco Security Advisories 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.
Fixed Releases
At the time of publication, the release information in the following table
(s) was accurate. See the Details section in the bug ID(s) at the top of
this advisory for the most complete and current information.
The left column lists Cisco software releases, and the right column
indicates whether a release was affected by the vulnerability described in
this advisory and which release included the fix for this vulnerability.
Cisco SD-WAN Software Release First Fixed Release
18.4 18.4.6
19.2 19.2.3
20.3 20.3.2
20.4 20.4.1
20.5 20.5.1
See the Details section in the bug ID(s) at the top of this advisory for
the most complete and current information.
Exploitation and Public Announcements
o 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.
Source
o This vulnerability was found by Joseph Connor of Cisco during internal
security testing.
Cisco Security Vulnerability Policy
o To learn about Cisco security vulnerability disclosure policies and
publications, see the Security Vulnerability Policy . This document also
contains instructions for obtaining fixed software and receiving security
vulnerability information from Cisco.
URL
o https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-sdw-mpls-infodisclos-MSSRFkZq
Revision History
o +----------+---------------------------+----------+--------+--------------+
| Version | Description | Section | Status | Date |
+----------+---------------------------+----------+--------+--------------+
| 1.0 | Initial public release. | - | Final | 2021-JUL-21 |
+----------+---------------------------+----------+--------+--------------+
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