medium
6.8
CWE
119
Advisory Published
Updated

CVE-2017-6720: Buffer Overflow

First published: Thu Sep 21 2017(Updated: )

A vulnerability in the Secure Shell (SSH) subsystem of Cisco Small Business Managed Switches software could allow an authenticated, remote attacker to cause a reload of the affected switch, resulting in a denial of service (DoS) condition. The vulnerability is due to improper processing of SSH connections. An attacker could exploit this vulnerability by logging in to an affected switch via SSH and sending a malicious SSH message. This vulnerability affects the following Cisco products when SSH is enabled: Small Business 300 Series Managed Switches, Small Business 500 Series Stackable Managed Switches, 350 Series Managed Switches, 350X Series Stackable Managed Switches, 550X Series Stackable Managed Switches, ESW2 Series Advanced Switches. Cisco Bug IDs: CSCvb48377.

Credit: ykramarz@cisco.com

Affected SoftwareAffected VersionHow to fix
Cisco SF302-08<1.4.8.06
Cisco SF302-08
Cisco SF302-08<1.4.8.06
Cisco SF302-08
Cisco SG300-10PP<1.4.8.06
Cisco SG300-10 Firmware
Cisco SG300-10MPP Firmware<1.4.8.06
Cisco SG300-10MPP Firmware
Cisco SF300-24P<1.4.8.06
Cisco SF300-24PP Firmware
Cisco SF300-48PP Firmware<1.4.8.06
Cisco SF300-48PP Firmware
Cisco SG300-28PP Firmware<1.4.8.06
Cisco SG300-28PP Firmware
Cisco SF300-08 Firmware<1.4.8.06
Cisco SF300-08 Firmware
Cisco SF300-48P Firmware<1.4.8.06
Cisco SF300-48P Firmware
Cisco SG300-10MP Firmware<1.4.8.06
Cisco SG300-10MP Firmware
Cisco SG300-10P Firmware<1.4.8.06
Cisco SG300-10P Firmware
Cisco SG300 Series Firmware<1.4.8.06
Cisco SG300-10 Firmware
Cisco SG300-28P Firmware<1.4.8.06
Cisco SG300-28P
Cisco SF300-24P<1.4.8.06
Cisco SF300-24 Firmware
Cisco SF302-08<1.4.8.06
Cisco SF302-08
Cisco SG300-28P<1.4.8.06
Cisco SG300-28 Firmware
Cisco SF300-48P Firmware<1.4.8.06
Cisco SF300-48P
Cisco SG300 Series Firmware<1.4.8.06
Cisco SG300-20 Firmware
Cisco SF302-08P<1.4.8.06
Cisco SF302-08
Cisco SG300 Series Firmware<1.4.8.06
Cisco SG300-52P
Cisco SF300-24P Firmware<1.4.8.06
Cisco SF300-24 Firmware
Cisco SF302-08 Firmware<1.4.8.06
Cisco SF302-08 Firmware
Cisco SF300-24MP Firmware<1.4.8.06
Cisco SF300-24MP Firmware
Cisco SG300 Series Firmware<1.4.8.06
Cisco SG300-10SFP Firmware
Cisco SG300-28MP<1.4.8.06
Cisco SG300-28MP
Cisco SG300-52P Firmware<1.4.8.06
Cisco SG300-52P Firmware
Cisco SG300-52MP Firmware<1.4.8.06
Cisco SG300-52MP Firmware
Cisco SG500-28PP Firmware<1.4.8.06
Cisco SG500-28MPP Firmware
Cisco SG500-52MP<1.4.8.06
Cisco SG500-52
Cisco SG500XG-8F8T<1.4.8.06
Cisco SG500XG-8F8T Firmware
Cisco SF500-24<1.4.8.06
Cisco SF500-24MP
Cisco SF500-24P<1.4.8.06
Cisco SF500-24P Firmware
Cisco SF500-48P Firmware<1.4.8.06
Cisco SF500-48 Firmware
Cisco 500 Series Switch Firmware<1.4.8.06
Cisco SF500-48 Firmware
Cisco SG500-28<1.4.8.06
Cisco SG500-28PP Firmware
Cisco SG500-28P<1.4.8.06
Cisco SG500-28P
Cisco SG500-52P<1.4.8.06
Cisco SG500-52 Firmware
Cisco SG500-52P<1.4.8.06
Cisco SG500-52P
Cisco SG500X-24<1.4.8.06
Cisco SG500X-24P
Cisco SG500X-24P<1.4.8.06
Cisco SG500X-24P
Cisco SG500X-48<1.4.8.06
Cisco SG500X-48MP Firmware
Cisco SG500X-48P<1.4.8.06
Cisco SG500X-48P
Cisco 250/350/350X/550X/ESW2 Series Switches Firmware<1.4.8.06
Cisco Business 350 Series
Cisco ESW2-350G-52DC<1.4.8.06
Cisco ESW2-350G-52DC Firmware
Cisco 250/350/350X/550X/ESW2 Series Switches Firmware<1.4.8.06
Cisco ESW2-550X-48 Firmware
Cisco 250/350/350X/550X/ESW2 Series Switches Firmware<1.4.8.06
Cisco ESW2-550X-48DC Firmware
Cisco SG350-10P<2.3.0.130
Cisco SG350-10 Firmware
Cisco SG350-10P<2.3.0.130
Cisco SG350-10P
Cisco SG350-10MP Firmware<2.3.0.130
Cisco SG350-10MP Firmware
Cisco SG355-10P<2.3.0.130
Cisco SG355-10P
Cisco SG350-28P Firmware<2.3.0.130
Cisco SG350-28 Firmware
Cisco SG350-28P Firmware<2.3.0.130
Cisco SG350-28P Firmware
Cisco SG350-28MP Firmware<2.3.0.130
Cisco SG350-28MP Firmware
Cisco SF350-48 Firmware<2.3.0.130
Cisco SF350-48 Firmware
Cisco SF350-48P Firmware<2.3.0.130
Cisco SF350-48P Firmware
Cisco SF350-48MP Firmware<2.3.0.130
Cisco SF350-48MP Firmware
Cisco SG350XG-2F10<2.3.0.130
Cisco SG350XG-2F10 Firmware
Cisco SG350XG-24F Firmware<2.3.0.130
Cisco SG350XG-24F Firmware
Cisco SG350XG-24F Firmware<2.3.0.130
Cisco SG350XG-24F Firmware
Cisco SG350XG-48T Firmware<2.3.0.130
Cisco SG350XG-48T Firmware
Cisco SG350X-24P Firmware<2.3.0.130
Cisco SG350X-24 Firmware
Cisco SG350X-24 Firmware<2.3.0.130
Cisco SG350X-24 Firmware
Cisco SG350X-24MP<2.3.0.130
Cisco SG350X-24MP Firmware
Cisco SG350X-48 Firmware<2.3.0.130
Cisco SG350X-48 Firmware
Cisco SG350X-48P Firmware<2.3.0.130
Cisco SG350X-48P Firmware
Cisco SG350X-48MP<2.3.0.130
Cisco SG350X-48MP Firmware
Cisco SX550X Firmware<2.3.0.130
Cisco SX550X-16FT Firmware
Cisco SX550X Firmware<2.3.0.130
Cisco SX550X-24FT Firmware
Cisco SX550X-12F Firmware<2.3.0.130
Cisco SX550X-12F Firmware
Cisco SX550X Firmware<2.3.0.130
Cisco SX550X-24F Firmware
Cisco SX550X Firmware<2.3.0.130
Cisco SX550X-24F Firmware
Cisco SX550X-52<2.3.0.130
Cisco SX550X-52
Cisco SG550X-24P Firmware<2.3.0.130
Cisco SG550X-24 Firmware
Cisco SG550X-24P Firmware<2.3.0.130
Cisco SG550X-24P Firmware
Cisco SG550X-24MP Firmware<2.3.0.130
Cisco SG550X-24MP Firmware
Cisco SG550X-24MPP Firmware<2.3.0.130
Cisco SG550X-24MPP Firmware
Cisco SG550X-48MP Firmware<2.3.0.130
Cisco SG550X-48 Firmware
Cisco SG550X-48P Firmware<2.3.0.130
Cisco SG550X-48P Firmware
Cisco SG550X-48MP Firmware<2.3.0.130
Cisco SG550X-48MP Firmware
Cisco SF550X-24P<2.3.0.130
Cisco SF550X-24 Firmware
Cisco SF550X-24P<2.3.0.130
Cisco SF550X-24P Firmware
Cisco SF550X-24MP Firmware<2.3.0.130
Cisco SF550X-24MP Firmware
Cisco SF550X-48<2.3.0.130
Cisco SF550X-48 Firmware
Cisco SF550X-48P Firmware<2.3.0.130
Cisco SG550X-48P
Cisco SG550X-48MP Firmware<2.3.0.130
Cisco SF550X-48MP Firmware

Never miss a vulnerability like this again

Sign up to SecAlerts for real-time vulnerability data matched to your software, aggregated from hundreds of sources.

Read MoreStart Free Trial

Reference Links

Frequently Asked Questions

  • What is the severity of CVE-2017-6720?

    CVE-2017-6720 has been classified with a severity level that could result in a denial of service (DoS) condition.

  • How do I fix CVE-2017-6720?

    To fix CVE-2017-6720, upgrade the affected Cisco Small Business Managed Switches software to a version greater than 1.4.8.06.

  • Which Cisco products are affected by CVE-2017-6720?

    CVE-2017-6720 affects various Cisco Small Business Managed Switch models with firmware versions up to 1.4.8.06.

  • What type of attack does CVE-2017-6720 facilitate?

    CVE-2017-6720 enables an authenticated, remote attacker to cause a reload of the affected switch.

  • Is CVE-2017-6720 easy to exploit?

    CVE-2017-6720 requires authentication, which may limit the ease of exploitation to authorized users.

Company

Resources

Contact

SecAlerts Pty Ltd.
132 Wickham Terrace
Fortitude Valley,
QLD 4006, Australia
info@secalerts.co
By using SecAlerts services, you agree to our services end-user license agreement. This website is safeguarded by reCAPTCHA and governed by the Google Privacy Policy and Terms of Service. All names, logos, and brands of products are owned by their respective owners, and any usage of these names, logos, and brands for identification purposes only does not imply endorsement. If you possess any content that requires removal, please get in touch with us.
© 2025 SecAlerts Pty Ltd.
ABN: 70 645 966 203, ACN: 645 966 203