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AUSCERT External Security Bulletin Redistribution
ESB-2018.1688.2
Security Vulnerabilities Cisco Wide Area Application Services Software
25 January 2019
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AusCERT Security Bulletin Summary
---------------------------------
Product: Cisco Wide Area Application Services
Publisher: Cisco Systems
Operating System: Cisco
Impact/Access: Root Compromise -- Existing Account
Access Confidential Data -- Remote/Unauthenticated
Resolution: Patch/Upgrade
CVE Names: CVE-2018-0352 CVE-2018-0329
Original Bulletin:
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20180606-waas-priv-escalation
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20180606-waas-snmp
Comment: This bulletin contains two (2) Cisco Systems security advisories.
Revision History: January 25 2019: Added information about a second affected script file.
June 7 2018: Initial Release
- --------------------------BEGIN INCLUDED TEXT--------------------
Cisco Wide Area Application Services Software Scripts Privilege Escalation
Vulnerability
Priority: Medium
Advisory ID: cisco-sa-20180606-waas-priv-escalation
First Published: 2018 June 6 16:00 GMT
Last Updated: 2019 January 24 17:17 GMT
Version 1.1: Final
Workarounds: No workarounds available
Cisco Bug IDs: CSCvi72673
CVE-2018-0352
CWE-264
CVSSÂ Score:
6.7 AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H/E:X/RL:X/RC:X
Summary
o
A vulnerability in Cisco-provided scripts (disk-check.sh and harcap.sh)
for Cisco Wide Area Application Services (WAAS) Software could allow an
authenticated, local attacker to elevate their privilege level to root.
The attacker must have valid user credentials with super user privileges
(level 15) to log in to the device.
The vulnerability is due to insufficient validation of script files
executed in the context of the Cisco-provided scripts. An attacker could
exploit this vulnerability by replacing one script file with a malicious
script file while an affected Cisco-provided script is running. A
successful exploit could allow the attacker to gain root-level privileges
and take full control of the 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-20180606-waas-priv-escalation
Affected Products
o Vulnerable Products
This vulnerability affects Cisco Wide Area Application Services (WAAS)
Software. For information about affected software releases, consult the
Cisco bug ID(s) at the top of this advisory.
Products Confirmed Not Vulnerable
Only products listed in the Vulnerable Products section of this advisory
are known to be affected by this vulnerability.
Details
o The WAAS Disk Check Tool (disk-check.sh) has been removed from Cisco.com
and is no longer available for download. However, the tool could still be
used to elevate privileges on devices running WAAS Software that do not
yet have the fix for this vulnerability by attackers who downloaded the
tool previously.
The harcap.sh script ships with WAAS Software Releases 5.5 and later by
default. In releases that contain the fix for this vulnerability, the
script can no longer be executed.
The fix for this vulnerability significantly changes the script signing
and validation methodology in WAAS Software. As a result of this change,
any scripts that were signed using the previous method will no longer run
in WAAS releases that include the fix for this vulnerability.
Signed scripts are typically provided to address a specific problem for a
limited set of releases only, so we generally do not expect previous
scripts to still be required after upgrade. In a situation where they
still apply after the upgrade to a release addressing this vulnerability,
customers are advised to contact the Cisco Technical Assistance Center
(TAC) to get their scripts updated.
Workarounds
o There are no workarounds that address this vulnerability.
Fixed Software
o 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
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 Cisco would like to thank external researcher Aaron Blair from RIoT
Solutions in Brisbane, Australia for reporting this vulnerability.
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.
Subscribe to Cisco Security Notifications
o Subscribe
URL
o https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20180606-waas-priv-escalation
Revision History
o
+---------+--------------------------+------------+--------+-----------------+
| Version | Description | Section | Status | Date |
+---------+--------------------------+------------+--------+-----------------+
| | Added information about | Title, | | |
| 1.1 | a second affected script | Summary, | Final | 2019-January-24 |
| | file. | Details | | |
+---------+--------------------------+------------+--------+-----------------+
| 1.0 | Initial public release. | | Final | 2018-June-06 |
+---------+--------------------------+------------+--------+-----------------+
- -------------------------------------------------------------------------------
Cisco Wide Area Application Services Software Static SNMP Credentials
Vulnerability
Medium
Advisory ID: cisco-sa-20180606-waas-snmp
First Published: 2018 June 6 16:00 GMT
Version 1.0: Final
Workarounds: No workarounds available
Cisco Bug IDs: CSCvi40137
CVSS Score: Base 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-2018-0329
CWE-798
Summary
o A vulnerability in the default configuration of the Simple Network
Management Protocol (SNMP) feature of Cisco Wide Area Application Services
(WAAS) Software could allow an unauthenticated, remote attacker to read
data from an affected device via SNMP.
The vulnerability is due to a hard-coded, read-only community string in the
configuration file for the SNMP daemon. An attacker could exploit this
vulnerability by using the static community string in SNMP version 2c
queries to an affected device. A successful exploit could allow the
attacker to read any data that is accessible via SNMP on the affected
device.
Note: The static credentials are defined in an internal configuration file
and are not visible in the current operation configuration
('running-config') or the startup configuration ('startup-config').
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-20180606-waas-snmp
Affected Products
o Vulnerable Products
This vulnerability affects Cisco Wide Area Application Services (WAAS)
Software with default configuration. For information about affected
software releases, consult the Cisco bug ID(s) at the top of this advisory.
Products Confirmed Not Vulnerable
Only products listed in the Vulnerable Products section of this advisory
are known to be affected by this vulnerability.
Workarounds
o There are no workarounds that address this vulnerability.
Fixed Software
o 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
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 Cisco would like to thank external researcher Aaron Blair from RIoT
Solutions in Brisbane, Australia for reporting this vulnerability.
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.
Subscribe to Cisco Security Notifications
o Subscribe
URL
o https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20180606-waas-snmp
Revision History
o +---------+---------------------------+---------+--------+---------------+
| Version | Description | Section | Status | Date |
+---------+---------------------------+---------+--------+---------------+
| 1.0 | Initial public release. | -- | Final | 2018-June-06 |
+---------+---------------------------+---------+--------+---------------+
Legal Disclaimer
o 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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