Facebook Google Plus Twitter LinkedIn YouTube RSS Menu Search Resource - BlogResource - WebinarResource - ReportResource - Eventicons_066 icons_067icons_068icons_069icons_070

[R1] Cisco Prime Collaboration Provisioning Restricted CLI Bypass Local Privilege Escalation

Medium

Synopsis

The Cisco Prime Collaboration Provisioning platform appears to provide a “walled” CLI (the CLI is similar to the one found on Cisco IOS) that protects the real Operating System from the user (Red Hat). This CLI is available through the terminal or SSH. However, a properly formatted “walled” CLI command available to users with the admin role (i.e. the default account) can bypass all protections and execute arbitrary commands as root. Two versions were tested and found vulnerable (9.0.0.23593 and 11.0.0.815). The second version (11.0.0.815) allows the root user to have access to a full/normal Red Hat bash terminal. However, all other user’s live in the walled-off CLI. Additionally, the first version (9.0.0.23593) has no option, as far as we could determine, to get access to a Red Hat bash terminal.

The admin user has access to the “show tech” command which will output a wide variety of diagnostic information. One of the options is to write the diagnostic information to disk. It was noticed that parsing extra quotes is not handled well and that “/bin/tar” is being executed via a system() call, and /bin/rm is being invoked as well. By appending a desired command after the quotes, it will get it executed four times. With a crafted command, an attacker could use this to control the entire box (including downloading additional software via wget).

Solution

Cisco has released Prime Collaboration Provisioning 11.1 which addresses this issue.

Disclosure Timeline

2015-12-23 - Issue discovered
2015-12-28 - Notified vendor via [email protected]
2015-12-28 - Vendor acknowledges receipt, assigns PSIRT-1265647782
2016-02-17 - Ping vendor for update
2016-02-18 - Vendor acks, loops in colleague handling case
2016-02-19 - Vendor indicates fixed in 11.1
2016-02-19 - Ask vendor if they are publishing advisory
2016-03-15 - Ping vendor for update
2016-03-15 - Vendor confirms advisory was posted on 2016-02-09

All information within TRA advisories is provided “as is”, without warranty of any kind, including the implied warranties of merchantability and fitness for a particular purpose, and with no guarantee of completeness, accuracy, or timeliness. Individuals and organizations are responsible for assessing the impact of any actual or potential security vulnerability.

Tenable takes product security very seriously. If you believe you have found a vulnerability in one of our products, we ask that you please work with us to quickly resolve it in order to protect customers. Tenable believes in responding quickly to such reports, maintaining communication with researchers, and providing a solution in short order.

For more details on submitting vulnerability information, please see our Vulnerability Reporting Guidelines page.

If you have questions or corrections about this advisory, please email [email protected]

Risk Information

CVE ID: CVE-2016-1320
Tenable Advisory ID: TRA-2016-38
Credit:
Jacob Baines, Tenable Network Security
CVSSv2 Base / Temporal Score:
4.3 / 3.6
CVSSv2 Vector:
(AV:L/AC:L/Au:S/C:P/I:P/A:P/E:F/RL:OF/RC:C)
Affected Products:
Cisco Prime Collaboration Provisioning 9.0.0.23593, 11.0.0.815
Risk Factor:
Medium
Additional Keywords:
CWE-264, PSIRT-1265647782, CSCux69286

Advisory Timeline

2016-12-05 - [R1] Initial Release

Tenable Vulnerability Management

Enjoy full access to a modern, cloud-based vulnerability management platform that enables you to see and track all of your assets with unmatched accuracy.

Your Tenable Vulnerability Management trial also includes Tenable Lumin and Tenable Web App Scanning.

Tenable Vulnerability Management

Enjoy full access to a modern, cloud-based vulnerability management platform that enables you to see and track all of your assets with unmatched accuracy. Purchase your annual subscription today.

100 assets

Choose Your Subscription Option:

Buy Now

Tenable Vulnerability Management

Enjoy full access to a modern, cloud-based vulnerability management platform that enables you to see and track all of your assets with unmatched accuracy.

Your Tenable Vulnerability Management trial also includes Tenable Lumin and Tenable Web App Scanning.

Tenable Vulnerability Management

Enjoy full access to a modern, cloud-based vulnerability management platform that enables you to see and track all of your assets with unmatched accuracy. Purchase your annual subscription today.

100 assets

Choose Your Subscription Option:

Buy Now

Tenable Vulnerability Management

Enjoy full access to a modern, cloud-based vulnerability management platform that enables you to see and track all of your assets with unmatched accuracy.

Your Tenable Vulnerability Management trial also includes Tenable Lumin and Tenable Web App Scanning.

Tenable Vulnerability Management

Enjoy full access to a modern, cloud-based vulnerability management platform that enables you to see and track all of your assets with unmatched accuracy. Purchase your annual subscription today.

100 assets

Choose Your Subscription Option:

Buy Now

Try Tenable Web App Scanning

Enjoy full access to our latest web application scanning offering designed for modern applications as part of the Tenable One Exposure Management platform. Safely scan your entire online portfolio for vulnerabilities with a high degree of accuracy without heavy manual effort or disruption to critical web applications. Sign up now.

Your Tenable Web App Scanning trial also includes Tenable Vulnerability Management and Tenable Lumin.

Buy Tenable Web App Scanning

Enjoy full access to a modern, cloud-based vulnerability management platform that enables you to see and track all of your assets with unmatched accuracy. Purchase your annual subscription today.

5 FQDNs

$3,578

Buy Now

Try Tenable Lumin

Visualize and explore your exposure management, track risk reduction over time and benchmark against your peers with Tenable Lumin.

Your Tenable Lumin trial also includes Tenable Vulnerability Management and Tenable Web App Scanning.

Buy Tenable Lumin

Contact a Sales Representative to see how Tenable Lumin can help you gain insight across your entire organization and manage cyber risk.

Try Tenable Nessus Professional Free

FREE FOR 7 DAYS

Tenable Nessus is the most comprehensive vulnerability scanner on the market today.

NEW - Tenable Nessus Expert
Now Available

Nessus Expert adds even more features, including external attack surface scanning, and the ability to add domains and scan cloud infrastructure. Click here to Try Nessus Expert.

Fill out the form below to continue with a Nessus Pro Trial.

Buy Tenable Nessus Professional

Tenable Nessus is the most comprehensive vulnerability scanner on the market today. Tenable Nessus Professional will help automate the vulnerability scanning process, save time in your compliance cycles and allow you to engage your IT team.

Buy a multi-year license and save. Add Advanced Support for access to phone, community and chat support 24 hours a day, 365 days a year.

Select Your License

Buy a multi-year license and save.

Add Support and Training

Try Tenable Nessus Expert Free

FREE FOR 7 DAYS

Built for the modern attack surface, Nessus Expert enables you to see more and protect your organization from vulnerabilities from IT to the cloud.

Already have Tenable Nessus Professional?
Upgrade to Nessus Expert free for 7 days.

Buy Tenable Nessus Expert

Built for the modern attack surface, Nessus Expert enables you to see more and protect your organization from vulnerabilities from IT to the cloud.

Select Your License

Buy a multi-year license and save more.

Add Support and Training