medium
5.3
CWE
20
Advisory Published
Updated

CVE-2020-3496: Cisco Small Business Smart and Managed Switches Denial of Service Vulnerability

First published: Wed Aug 26 2020(Updated: )

A vulnerability in the IPv6 packet processing engine of Cisco Small Business Smart and Managed Switches could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on an affected device. The vulnerability is due to insufficient validation of incoming IPv6 traffic. An attacker could exploit this vulnerability by sending a crafted IPv6 packet through an affected device. A successful exploit could allow the attacker to cause the switch management CLI to stop responding, resulting in a DoS condition. This vulnerability is specific to IPv6 traffic. IPv4 traffic is not affected.

Credit: ykramarz@cisco.com

Affected SoftwareAffected VersionHow to fix
Cisco SG200-50P Firmware<=2.5.5.47
Cisco SG200-50FP
Cisco SG200-50P Firmware<=2.5.5.47
Cisco SG200-50P Firmware
Cisco SG200-50FP Firmware<=2.5.5.47
Cisco SG200-50FP
Cisco SG200-26FP Firmware<=2.5.5.47
Cisco SG200-26P Firmware
Cisco SG200-26P Firmware<=2.5.5.47
Cisco SG200-26P Firmware
Cisco SG200-26FP Firmware<=2.5.5.47
Cisco SG200-26FP Firmware
Cisco SG200-18 Firmware<=2.5.5.47
Cisco SG200-18 Firmware
Cisco SG200-10FP Firmware<=2.5.5.47
Cisco SG200-10FP Firmware
Cisco SG200-08 Firmware<=2.5.5.47
Cisco SG200-08 Firmware
Cisco SG200-08P Firmware<=2.5.5.47
Cisco SG200-08P
Cisco SF200-24 Firmware<=2.5.5.47
Cisco SF200-24P
Cisco SF200-24P Firmware<=2.5.5.47
Cisco SF200-24P
Cisco SF200-24FP Firmware<=2.5.5.47
Cisco SF200-24FP
Cisco SF200-48 Firmware<=2.5.5.47
Cisco SF200-48 Firmware
Cisco SF200-48P Firmware<=2.5.5.47
Cisco SF200-48P Firmware
Cisco SF302-08PP Firmware<=2.5.5.47
Cisco SF302-08PP Firmware
Cisco SF302-08MPP Firmware<=2.5.5.47
Cisco SF302-08MPP
Cisco SG300-10PP Firmware<=2.5.5.47
Cisco SG300-10PP Firmware
Cisco SG300-10MPP Firmware<=2.5.5.47
Cisco SG300-10MPP Firmware
Cisco SF300-24PP Firmware<=2.5.5.47
Cisco SF300-24PP
Cisco SF300-48PP Firmware<=2.5.5.47
Cisco SF300-48PP Firmware
Cisco SG300-28PP Firmware<=2.5.5.47
Cisco SG300-28PP
Cisco SF300-08 Firmware<=2.5.5.47
Cisco SF300-08 Firmware
Cisco SF300-48P Firmware<=2.5.5.47
Cisco SF300-48P Firmware
Cisco SG300-10MP Firmware<=2.5.5.47
Cisco SG300-10MP Firmware
Cisco SG300-10P Firmware<=2.5.5.47
Cisco SG300-10P
Cisco SG300-10 Firmware<=2.5.5.47
Cisco SG300-10
Cisco SG300-28P Firmware<=2.5.5.47
Cisco SG300-28P
Cisco SF300-24P<=2.5.5.47
Cisco SF300-24P
Cisco SF302-08MP Firmware<=2.5.5.47
Cisco SF302-08MP
Cisco SG300-28 Firmware<=2.5.5.47
Cisco SG300-28
Cisco SF300-48P Firmware<=2.5.5.47
Cisco SF300-48
Cisco SG300-20 Firmware<=2.5.5.47
Cisco SG300-20 Firmware
Cisco SF302-08P Firmware<=2.5.5.47
Cisco SF302-08P Firmware
Cisco SG300-52 Firmware<=2.5.5.47
Cisco SG300-52
Cisco SF300-24P Firmware<=2.5.5.47
Cisco SF300-24
Cisco SF302-08 Firmware<=2.5.5.47
Cisco SF302-08
Cisco sf300-24mp firmware<=2.5.5.47
Cisco SF300-24MP
Cisco SG300-10SFP Firmware<=2.5.5.47
Cisco SG300-10SFP Firmware
Cisco SG300-28MP<=2.5.5.47
Cisco SG300-28MP
Cisco SG300-52P Firmware<=2.5.5.47
Cisco SG300-52P
Cisco SG300-52MP Firmware<=2.5.5.47
Cisco SG300-52MP
Cisco SG500-28PP Firmware<=2.5.5.47
Cisco SG500-28MPP Firmware
Cisco SG500-52MP<=2.5.5.47
Cisco SG500-52
Cisco SG500XG-8F8T Firmware<=2.5.5.47
Cisco SG500XG-8F8T Firmware
Cisco SF500-24<=2.5.5.47
Cisco SF500-24MP
Cisco SF500-24P<=2.5.5.47
Cisco SF500-24P Firmware
Cisco SF500-48P Firmware<=2.5.5.47
Cisco SF500-48 Firmware
Cisco SF500-48P Firmware<=2.5.5.47
Cisco SF500-48 Firmware
Cisco SG500-28<=2.5.5.47
Cisco SG500-28PP Firmware
Cisco SG500-28P<=2.5.5.47
Cisco SG500-28P
Cisco SG500-52P<=2.5.5.47
Cisco SG500-52 Firmware
Cisco SG500-52P<=2.5.5.47
Cisco SG500-52P
Cisco SG500X-24<=2.5.5.47
Cisco SG500X-24P
Cisco SG500X-24P<=2.5.5.47
Cisco SG500X-24P
Cisco SG500X-48<=2.5.5.47
Cisco SG500X-48MP Firmware
Cisco SG500X-48P<=2.5.5.47
Cisco SG500X-48P
Cisco SG250X-24P Firmware<=2.5.5.47
Cisco SG250X-24
Cisco SG250X-24P Firmware<=2.5.5.47
Cisco SG250X-24P Firmware
Cisco SG250X-48P Firmware<=2.5.5.47
Cisco SG250X-48 Firmware
Cisco SG250X-48P Firmware<=2.5.5.47
Cisco SG250X-48P Firmware
Cisco SG250-08HP Firmware<=2.5.5.47
Cisco SG250-08
Cisco SG250-08HP Firmware<=2.5.5.47
Cisco SG250-08HP
Cisco SG250-10P Firmware<=2.5.5.47
Cisco SG250-10P
Cisco SG250-18 Firmware<=2.5.5.47
Cisco SG250-18
Cisco SG250-26HP Firmware<=2.5.5.47
Cisco SG250-26 Firmware
Cisco SG250-26HP Firmware<=2.5.5.47
Cisco SG250-26HP Firmware
Cisco SG250-26P Firmware<=2.5.5.47
Cisco SG250-26P Firmware
Cisco SG250-50P Firmware<=2.5.5.47
Cisco SG250-50P Firmware
Cisco SG250-50HP Firmware<=2.5.5.47
Cisco SG250-50HP Firmware
Cisco SG250-50P Firmware<=2.5.5.47
Cisco SG250-50P Firmware
Cisco SF250-24 Firmware<=2.5.5.47
Cisco SF250-24
Cisco SF250-24P Firmware<=2.5.5.47
Cisco SF250-24P Firmware
Cisco SF250-48 Firmware<=2.5.5.47
Cisco SF250-48
Cisco sf250-48hp firmware<=2.5.5.47
Cisco sf250-48hp firmware
Cisco SG350-10 Firmware<=2.5.5.47
Cisco SG350-10P
Cisco SG350-10P<=2.5.5.47
Cisco SG350-10P
Cisco SG350-10MP Firmware<=2.5.5.47
Cisco SG350-10MP
Cisco SG355-10P<=2.5.5.47
Cisco SG355-10P
Cisco SG350-28 Firmware<=2.5.5.47
Cisco SG350-28
Cisco SG350-28P Firmware<=2.5.5.47
Cisco SG350-28P
Cisco SG350-28MP Firmware<=2.5.5.47
Cisco SG350-28MP
Cisco SF350-48 Firmware<=2.5.5.47
Cisco SF350-48P Firmware
Cisco SF350-48P Firmware<=2.5.5.47
Cisco SF350-48P Firmware
Cisco SF350-48MP Firmware<=2.5.5.47
Cisco SF350-48MP Firmware
Cisco SG350XG-2F10 Firmware<=2.5.5.47
Cisco SG350XG-2F10
Cisco SG350XG-24F Firmware<=2.5.5.47
Cisco SG350XG-24F Firmware
Cisco SG350XG-24T Firmware<=2.5.5.47
Cisco SG350XG-24T Firmware
Cisco SG350XG-48T Firmware<=2.5.5.47
Cisco SG350XG-48T Firmware
Cisco SG350X-24 Firmware<=2.5.5.47
Cisco SG350X-24 Firmware
Cisco SG350X-24 Firmware<=2.5.5.47
Cisco SG350X-24PV
Cisco SG350X-24MP Firmware<=2.5.5.47
Cisco SG350X-24MP
Cisco SG350X-48 Firmware<=2.5.5.47
Cisco SG350X-48
Cisco SG350X-48P Firmware<=2.5.5.47
Cisco SG350X-48P Firmware
Cisco SG350X-48MP Firmware<=2.5.5.47
Cisco SG350X-48MP Firmware
Cisco SX550X-16FT Firmware<=2.5.5.47
Cisco SX550X-16FT
Cisco SX550X-24FT Firmware<=2.5.5.47
Cisco SX550X-24FT
Cisco SX550X-12F Firmware<=2.5.5.47
Cisco SX550X-12F Firmware
Cisco SX550X-24F Firmware<=2.5.5.47
Cisco SX550X-24F Firmware
Cisco SX550X-24FT Firmware<=2.5.5.47
Cisco SX550X-24
Cisco SX550X-52 Firmware<=2.5.5.47
Cisco SX550X-52
Cisco SG550X-24 Firmware<=2.5.5.47
Cisco SG550X-24 Firmware
Cisco SG550X-24P Firmware<=2.5.5.47
Cisco SG550X-24P Firmware
Cisco SG550X-24MP Firmware<=2.5.5.47
Cisco SG550X-24MP
Cisco SG550X-24MPP Firmware<=2.5.5.47
Cisco SG550X-24MPP
Cisco SG550X-48MP Firmware<=2.5.5.47
Cisco SG550X-48T
Cisco SG550X-48P Firmware<=2.5.5.47
Cisco SG550X-48P
Cisco SG550X-48MP Firmware<=2.5.5.47
Cisco SG550X-48MP
Cisco SF550X-24 Firmware<=2.5.5.47
Cisco SF550X-24 Firmware
Cisco SF550X-24P Firmware<=2.5.5.47
Cisco SF550X-24P
Cisco SF550X-24MP Firmware<=2.5.5.47
Cisco SF550X-24MP
Cisco SF550X-48 Firmware<=2.5.5.47
Cisco SF550X-48
Cisco SF550X-48P Firmware<=2.5.5.47
Cisco SG550X-48P
Cisco SG550X-48MP Firmware<=2.5.5.47
Cisco SF550X-48MP

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Reference Links

Frequently Asked Questions

  • What is the severity of CVE-2020-3496?

    CVE-2020-3496 has been classified as a high severity vulnerability due to its potential to cause a denial of service condition.

  • How do I fix CVE-2020-3496?

    To mitigate CVE-2020-3496, users should update their Cisco Small Business Smart and Managed Switches to the latest firmware version that addresses this vulnerability.

  • Which devices are affected by CVE-2020-3496?

    CVE-2020-3496 affects various models of Cisco Small Business Smart and Managed Switches running specific firmware versions.

  • Can CVE-2020-3496 be exploited remotely?

    Yes, CVE-2020-3496 can be exploited by an unauthenticated, remote attacker.

  • What impact does CVE-2020-3496 have on the switch functionality?

    The exploitation of CVE-2020-3496 can lead to a denial of service condition, disrupting the normal operation of the affected switches.

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