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

[R2] Netatalk Out-of-bounds Write

Critical
← View More Research Advisories

Synopsis

Tenable discovered an out-of-bounds write in Netatalk's dsi_opensession() function in dsi_opensess.c. The vulnerable code follows:

memcpy(&dsi->attn_quantum, dsi->commands + i + 1, dsi->commands[i]);

The attn_quantum variable is a 32 bit integer and dsi->commands is attacker controlled. A remote unauthenticated attacker can leverage this to write 251 bytes beyond the attn_quantum in the dsi struct and control code execution.

Solution

Upgrade to Netatalk 3.1.12.

Additional References

http://netatalk.sourceforge.net/3.1/ReleaseNotes3.1.12.html
https://attachments.samba.org/attachment.cgi?id=14735
https://github.com/tenable/poc/tree/master/netatalk/cve_2018_1160/
https://www.synology.com/en-us/security/advisory/Synology_SA_18_62
https://bugzilla.opensuse.org/show_bug.cgi?id=1119540

Disclosure Timeline

10/27/2018 - Tenable contacts a project admin asking for the best place to disclose.
10/28/2018 - Project admin replies that they are a reasonable choice.
10/28/2018 - Tenable discloses via encrypted email. 90 day: Jan 28.
10/29/2018 - Netatalk thanks Tenable and indicates a fix should be ready before the 90 days. Asks Tenable for a public key.
10/29/2018 - Tenable sends a public key and assigns CVE-2018-1160.
11/11/2018 - Netatalk shares a patch.
11/11/2018 - Tenable acknowledges the email.
11/27/2018 - Tenable asks for an update.
11/27/2018 - Netatalk still reviewing the patch. Asks Tenable for feedback.
11/28/2018 - Tenable somehow overlooked Netatalk had shared the patch. Tenable thinks the patch looks good.
11/28/2018 - Netatalk acknowledges Tenable's response.
12/11/2018 - Tenable reminds Netatalk that 45 days remain in the disclosure timeline.
12/13/2018 - Netatalk proposes 12/20 disclosure. Shares a copy of an advisory and discusses plans for disseminating the disclosure.
12/13/2018 - Tenable acknowledges the disclosure date. Further discusses disclosure related information.
12/13/2018 - Netatalk further explains open source vulnerability disclosure.
12/19/2018 - Tenable checks in with Netatalk to see if 12/20 is still on track.
12/19/2018 - Netatalk confirms and suggests a 4pm CET release time.
12/19/2018 - Tenable agrees that works.
12/19/2018 - Netatalk shares a second version of the advisory.
12/20/2018 - Tenable tries to notify vendors they believe are affected.

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-2018-1160
Tenable Advisory ID: TRA-2018-48
Credit:
Jacob Baines
CVSSv2 Base / Temporal Score:
10.0 / 7.8
CVSSv2 Vector:
AV:N/AC:L/Au:N/C:C/I:C/A:C
Nessus Plugin ID: 119780
119946
119870
119853
119817
Affected Products:
Netatalk 3.1.11 and below
Risk Factor:
Critical

Advisory Timeline

12/20/2018 - [R1] Initial Release
12/22/2018 - [R2] Added a vendor advisory
Try for free 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 for free 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 for free 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 for free 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 for free Contact sales

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.

Request a demo of Tenable Security Center

Please fill out this form with your contact information.

A sales representative will contact you shortly to schedule a demo.

* Field is required

Request a demo of Tenable OT Security

Get the Operational Technology security you need.

Reduce the risk you don’t.

Request a demo of Tenable Identity Exposure

Continuously detect and respond to Active Directory attacks. No agents. No privileges.

On-prem and in the cloud.

Request a demo of Tenable Cloud Security

Exceptional unified cloud security awaits you!

We’ll show you exactly how Tenable Cloud Security helps you deliver multi-cloud asset discovery, prioritized risk assessments and automated compliance/audit reports.

See
Tenable One
in action

Exposure management for the modern attack surface.

See Tenable Attack Surface Management in action

Know the exposure of every asset on any platform.

Get a demo of Tenable Enclave Security

Please fill out the form with your contact information and a sales representative will contact you shortly to schedule a demo.

Try for free Buy now

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
Buy Now
Renew an existing license Find a reseller
Try for free Buy now

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
Buy Now
Renew an existing license Find a reseller