CVE-2020-3147: Cisco Small Business Switches Denial of Service Vulnerability

Published Jan 29, 2020
·
Updated

A vulnerability in the web UI of Cisco Small Business Switches could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on an affected device. The vulnerability is due to improper validation of requests sent to the web interface. An attacker could exploit this vulnerability by sending a malicious request to the web interface of an affected device. A successful exploit could allow the attacker to cause an unexpected reload of the device, resulting in a DoS condition. This vulnerability affects firmware releases prior than 1.3.7.18

Affected Software

228 affected components
Cisco Sg200-50 Firmware<1.3.7.18
Cisco Sg200-50
Cisco Sg200-50p Firmware<1.3.7.18
Cisco Sg200-50p
Cisco Sg200-50fp Firmware<1.3.7.18
Cisco Sg200-50fp
Cisco Sg200-26 Firmware<1.3.7.18
Cisco Sg200-26
Cisco Sg200-26p Firmware<1.3.7.18
Cisco Sg200-26p
Cisco Sg200-26fp Firmware<1.3.7.18
Cisco Sg200-26fp
Cisco Sg200-18 Firmware<1.3.7.18
Cisco Sg200-18
Cisco Sg200-10fp Firmware<1.3.7.18
Cisco Sg200-10fp
Cisco Sg200-08 Firmware<1.3.7.18
Cisco Sg200-08
Cisco Sg200-08p Firmware<1.3.7.18
Cisco Sg200-08p
Cisco Sg200-24 Firmware<1.3.7.18
Cisco Sg200-24
Cisco Sg200-24p Firmware<1.3.7.18
Cisco Sg200-24p
Cisco Sg200-24fp Firmware<1.3.7.18
Cisco Sg200-24fp
Cisco Sg200-48 Firmware<1.3.7.18
Cisco Sg200-48
Cisco Sg200-48p Firmware<1.3.7.18
Cisco Sg200-48p
Cisco Sf302-08pp Firmware<1.3.7.18
Cisco Sf302-08pp
Cisco Sf302-08mpp Firmware<1.3.7.18
Cisco Sf302-08mpp
Cisco Sg300-10pp Firmware<1.3.7.18
Cisco Sg300-10pp
Cisco Sg300-10mpp Firmware<1.3.7.18
Cisco Sg300-10mpp
Cisco Sf300-24pp Firmware<1.3.7.18
Cisco Sf300-24pp
Cisco Sf300-48pp Firmware<1.3.7.18
Cisco Sf300-48pp
Cisco Sg300-28pp Firmware<1.3.7.18
Cisco Sg300-28pp
Cisco Sf300-08 Firmware<1.3.7.18
Cisco Sf300-08
Cisco Sf300-48p Firmware<1.3.7.18
Cisco Sf300-48p
Cisco Sg300-10mp Firmware<1.3.7.18
Cisco Sg300-10mp
Cisco Sg300-10p Firmware<1.3.7.18
Cisco Sg300-10p
Cisco Sg300-10 Firmware<1.3.7.18
Cisco Sg300-10
Cisco Sg300-28p Firmware<1.3.7.18
Cisco Sg300-28p
Cisco Sf300-24p Firmware<1.3.7.18
Cisco Sf300-24p
Cisco Sf302-08mp Firmware<1.3.7.18
Cisco Sf302-08mp
Cisco Sg300-28 Firmware<1.3.7.18
Cisco Sg300-28
Cisco Sf300-48 Firmware<1.3.7.18
Cisco Sf300-48
Cisco Sg300-20 Firmware<1.3.7.18
Cisco Sg300-20
Cisco Sf302-08p Firmware<1.3.7.18
Cisco Sf302-08p
Cisco Sg300-52 Firmware<1.3.7.18
Cisco Sg300-52
Cisco Sf300-24 Firmware<1.3.7.18
Cisco Sf300-24
Cisco Sf302-08 Firmware<1.3.7.18
Cisco Sf302-08
Cisco Sf300-24mp Firmware<1.3.7.18
Cisco Sf300-24mp
Cisco Sg300-10sfp Firmware<1.3.7.18
Cisco Sg300-10sfp
Cisco Sg300-28mp Firmware<1.3.7.18
Cisco Sg300-28mp
Cisco Sg300-52p Firmware<1.3.7.18
Cisco Sg300-52p
Cisco Sg300-52mp Firmware<1.3.7.18
Cisco Sg300-52mp
Cisco Sg500-28mpp Firmware<1.3.7.18
Cisco Sg500-28mpp
Cisco Sg500-52mp Firmware<1.3.7.18
Cisco Sg500-52mp
Cisco Sg500xg-8f8t Firmware<1.3.7.18
Cisco Sg500xg-8f8t
Cisco Sf500-24 Firmware<1.3.7.18
Cisco Sf500-24
Cisco Sf500-24p Firmware<1.3.7.18
Cisco Sf500-24p
Cisco Sf500-48 Firmware<1.3.7.18
Cisco Sf500-48
Cisco Sf500-48p Firmware<1.3.7.18
Cisco Sf500-48p
Cisco Sg500-28 Firmware<1.3.7.18
Cisco Sg500-28
Cisco Sg500-28p Firmware<1.3.7.18
Cisco Sg500-28p
Cisco Sg500-52 Firmware<1.3.7.18
Cisco Sg500-52
Cisco Sg500-52p Firmware<1.3.7.18
Cisco Sg500-52p
Cisco Sg500x-24 Firmware<1.3.7.18
Cisco Sg500x-24
Cisco Sg500x-24p Firmware<1.3.7.18
Cisco Sg500x-24p
Cisco Sg500x-48 Firmware<1.3.7.18
Cisco Sg500x-48
Cisco Sg500x-48p Firmware<1.3.7.18
Cisco Sg500x-48p
All of the following
Cisco Sg200-50 Firmware<1.3.7.18
Cisco Sg200-50
All of the following
Cisco Sg200-50p Firmware<1.3.7.18
Cisco Sg200-50p
All of the following
Cisco Sg200-50fp Firmware<1.3.7.18
Cisco Sg200-50fp
All of the following
Cisco Sg200-26 Firmware<1.3.7.18
Cisco Sg200-26
All of the following
Cisco Sg200-26p Firmware<1.3.7.18
Cisco Sg200-26p
All of the following
Cisco Sg200-26fp Firmware<1.3.7.18
Cisco Sg200-26fp
All of the following
Cisco Sg200-18 Firmware<1.3.7.18
Cisco Sg200-18
All of the following
Cisco Sg200-10fp Firmware<1.3.7.18
Cisco Sg200-10fp
All of the following
Cisco Sg200-08 Firmware<1.3.7.18
Cisco Sg200-08
All of the following
Cisco Sg200-08p Firmware<1.3.7.18
Cisco Sg200-08p
All of the following
Cisco Sg200-24 Firmware<1.3.7.18
Cisco Sg200-24
All of the following
Cisco Sg200-24p Firmware<1.3.7.18
Cisco Sg200-24p
All of the following
Cisco Sg200-24fp Firmware<1.3.7.18
Cisco Sg200-24fp
All of the following
Cisco Sg200-48 Firmware<1.3.7.18
Cisco Sg200-48
All of the following
Cisco Sg200-48p Firmware<1.3.7.18
Cisco Sg200-48p
All of the following
Cisco Sf302-08pp Firmware<1.3.7.18
Cisco Sf302-08pp
All of the following
Cisco Sf302-08mpp Firmware<1.3.7.18
Cisco Sf302-08mpp
All of the following
Cisco Sg300-10pp Firmware<1.3.7.18
Cisco Sg300-10pp
All of the following
Cisco Sg300-10mpp Firmware<1.3.7.18
Cisco Sg300-10mpp
All of the following
Cisco Sf300-24pp Firmware<1.3.7.18
Cisco Sf300-24pp
All of the following
Cisco Sf300-48pp Firmware<1.3.7.18
Cisco Sf300-48pp
All of the following
Cisco Sg300-28pp Firmware<1.3.7.18
Cisco Sg300-28pp
All of the following
Cisco Sf300-08 Firmware<1.3.7.18
Cisco Sf300-08
All of the following
Cisco Sf300-48p Firmware<1.3.7.18
Cisco Sf300-48p
All of the following
Cisco Sg300-10mp Firmware<1.3.7.18
Cisco Sg300-10mp
All of the following
Cisco Sg300-10p Firmware<1.3.7.18
Cisco Sg300-10p
All of the following
Cisco Sg300-10 Firmware<1.3.7.18
Cisco Sg300-10
All of the following
Cisco Sg300-28p Firmware<1.3.7.18
Cisco Sg300-28p
All of the following
Cisco Sf300-24p Firmware<1.3.7.18
Cisco Sf300-24p
All of the following
Cisco Sf302-08mp Firmware<1.3.7.18
Cisco Sf302-08mp
All of the following
Cisco Sg300-28 Firmware<1.3.7.18
Cisco Sg300-28
All of the following
Cisco Sf300-48 Firmware<1.3.7.18
Cisco Sf300-48
All of the following
Cisco Sg300-20 Firmware<1.3.7.18
Cisco Sg300-20
All of the following
Cisco Sf302-08p Firmware<1.3.7.18
Cisco Sf302-08p
All of the following
Cisco Sg300-52 Firmware<1.3.7.18
Cisco Sg300-52
All of the following
Cisco Sf300-24 Firmware<1.3.7.18
Cisco Sf300-24
All of the following
Cisco Sf302-08 Firmware<1.3.7.18
Cisco Sf302-08
All of the following
Cisco Sf300-24mp Firmware<1.3.7.18
Cisco Sf300-24mp
All of the following
Cisco Sg300-10sfp Firmware<1.3.7.18
Cisco Sg300-10sfp
All of the following
Cisco Sg300-28mp Firmware<1.3.7.18
Cisco Sg300-28mp
All of the following
Cisco Sg300-52p Firmware<1.3.7.18
Cisco Sg300-52p
All of the following
Cisco Sg300-52mp Firmware<1.3.7.18
Cisco Sg300-52mp
All of the following
Cisco Sg500-28mpp Firmware<1.3.7.18
Cisco Sg500-28mpp
All of the following
Cisco Sg500-52mp Firmware<1.3.7.18
Cisco Sg500-52mp
All of the following
Cisco Sg500xg-8f8t Firmware<1.3.7.18
Cisco Sg500xg-8f8t
All of the following
Cisco Sf500-24 Firmware<1.3.7.18
Cisco Sf500-24
All of the following
Cisco Sf500-24p Firmware<1.3.7.18
Cisco Sf500-24p
All of the following
Cisco Sf500-48 Firmware<1.3.7.18
Cisco Sf500-48
All of the following
Cisco Sf500-48p Firmware<1.3.7.18
Cisco Sf500-48p
All of the following
Cisco Sg500-28 Firmware<1.3.7.18
Cisco Sg500-28
All of the following
Cisco Sg500-28p Firmware<1.3.7.18
Cisco Sg500-28p
All of the following
Cisco Sg500-52 Firmware<1.3.7.18
Cisco Sg500-52
All of the following
Cisco Sg500-52p Firmware<1.3.7.18
Cisco Sg500-52p
All of the following
Cisco Sg500x-24 Firmware<1.3.7.18
Cisco Sg500x-24
All of the following
Cisco Sg500x-24p Firmware<1.3.7.18
Cisco Sg500x-24p
All of the following
Cisco Sg500x-48 Firmware<1.3.7.18
Cisco Sg500x-48
All of the following
Cisco Sg500x-48p Firmware<1.3.7.18
Cisco Sg500x-48p

Remediation

Recommended actions to resolve this vulnerability, in priority order.

  1. Upgrade

    Upgrade Cisco Small Business Switches firmware to a version that resolves this vulnerability.

    Fixed in 1.3.7.18
  2. Compensating control

    Because the vulnerability can be exploited by sending a malicious request to the web interface, restrict network access to the Cisco Small Business Switches web UI to trusted sources only (e.g., limit management/web UI access via firewall/ACL) to reduce exposure to unauthenticated remote requests.

Event History

Jan 29, 2020
CVE Published
via MITRE·10:10 PM
Data Sourced
via MITRE·10:10 PM
DescriptionSeverityWeakness
Jan 30, 2020
Data Sourced
via NVD·07:15 PM
DescriptionSeverityWeaknessAffected Software
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Frequently Asked Questions

1

What is the severity of CVE-2020-3147?

CVE-2020-3147 has a critical severity rating due to its potential to cause denial of service on affected Cisco Small Business Switches.

2

How do I fix CVE-2020-3147?

To mitigate CVE-2020-3147, update the firmware of affected Cisco devices to versions greater than 1.3.7.18.

3

What devices are affected by CVE-2020-3147?

CVE-2020-3147 affects multiple models of Cisco Small Business Switches including the SG200, SG300, and SF300 series.

4

Can CVE-2020-3147 allow remote attacks on my network?

Yes, CVE-2020-3147 allows unauthenticated remote attackers to exploit the vulnerability and potentially cause a denial of service.

5

Is there a workaround for CVE-2020-3147?

Disabling the web interface on affected devices can serve as a temporary workaround until the firmware is updated to a secure version.

Company

Resources

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