Strix
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CVE-2020-3297

CRITICALCVSS 9.8/10EPSS 3.04%

Last modified

CVE-2020-3297 is a critical-severity vulnerability rated 9.8/10 on the CVSS scale. A vulnerability in session management for the web-based interface of Cisco Small Business Smart and Managed Switches could allow an unauthenticated, remote attacker to defeat authentication protections and gain unauthorized access to the management interface. The attacker could obtain the privileges of the highjacked session account, which could include administrator privileges on the device. EPSS estimates a 3.04% chance of exploitation in the next 30 days.

Description

A vulnerability in session management for the web-based interface of Cisco Small Business Smart and Managed Switches could allow an unauthenticated, remote attacker to defeat authentication protections and gain unauthorized access to the management interface. The attacker could obtain the privileges of the highjacked session account, which could include administrator privileges on the device. The vulnerability is due to the use of weak entropy generation for session identifier values. An attacker could exploit this vulnerability to determine a current session identifier through brute force and reuse that session identifier to take over an ongoing session. In this way, an attacker could take actions within the management interface with privileges up to the level of the administrative user.

Metrics

CVSS 3.1
9.8/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS Probability
3.04%

85.8th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

VendorProductVersions
CiscoSg250x-24 Firmware< 2.5.5.47
CiscoSg250x-24p Firmware< 2.5.5.47
CiscoSg250x-48 Firmware< 2.5.5.47
CiscoSg250x-48p Firmware< 2.5.5.47
CiscoSg250-08 Firmware< 2.5.5.47
CiscoSg250-08hp Firmware< 2.5.5.47
CiscoSg250-10p Firmware< 2.5.5.47
CiscoSg250-18 Firmware< 2.5.5.47
CiscoSg250-26 Firmware< 2.5.5.47
CiscoSg250-26hp Firmware< 2.5.5.47
CiscoSg250-26p Firmware< 2.5.5.47
CiscoSg250-50 Firmware< 2.5.5.47
CiscoSg250-50hp Firmware< 2.5.5.47
CiscoSg250-50p Firmware< 2.5.5.47
CiscoSf250-24 Firmware< 2.5.5.47
CiscoSf250-24p Firmware< 2.5.5.47
CiscoSf250-48 Firmware< 2.5.5.47
CiscoSf250-48hp Firmware< 2.5.5.47
CiscoSg350-10 Firmware< 2.5.5.47
CiscoSg350-10p Firmware< 2.5.5.47
CiscoSg350-10mp Firmware< 2.5.5.47
CiscoSg355-10p Firmware< 2.5.5.47
CiscoSg350-28 Firmware< 2.5.5.47
CiscoSg350-28p Firmware< 2.5.5.47
CiscoSg350-28mp Firmware< 2.5.5.47
CiscoSf350-48 Firmware< 2.5.5.47
CiscoSf350-48p Firmware< 2.5.5.47
CiscoSf350-48mp Firmware< 2.5.5.47
CiscoSg350xg-2f10 Firmware< 2.5.5.47
CiscoSg350xg-24f Firmware< 2.5.5.47
CiscoSg350xg-24t Firmware< 2.5.5.47
CiscoSg350xg-48t Firmware< 2.5.5.47
CiscoSg350x-24 Firmware< 2.5.5.47
CiscoSg350x-24p Firmware< 2.5.5.47
CiscoSg350x-24mp Firmware< 2.5.5.47
CiscoSg350x-48 Firmware< 2.5.5.47
CiscoSg350x-48p Firmware< 2.5.5.47
CiscoSg350x-48mp Firmware< 2.5.5.47
CiscoSx550x-16ft Firmware< 2.5.5.47
CiscoSx550x-24ft Firmware< 2.5.5.47
CiscoSx550x-12f Firmware< 2.5.5.47
CiscoSx550x-24f Firmware< 2.5.5.47
CiscoSx550x-24 Firmware< 2.5.5.47
CiscoSx550x-52 Firmware< 2.5.5.47
CiscoSg550x-24 Firmware< 2.5.5.47
CiscoSg550x-24p Firmware< 2.5.5.47
CiscoSg550x-24mp Firmware< 2.5.5.47
CiscoSg550x-24mpp Firmware< 2.5.5.47
CiscoSg550x-48 Firmware< 2.5.5.47
CiscoSg550x-48p Firmware< 2.5.5.47

Showing 50 of 118 affected configurations. See NVD for the full list.

References

Timeline

Published
Last Modified
Status
Modified

Frequently Asked Questions

What is CVE-2020-3297?
A vulnerability in session management for the web-based interface of Cisco Small Business Smart and Managed Switches could allow an unauthenticated, remote attacker to defeat authentication protections and gain unauthorized access to the management interface. The attacker could obtain the privileges of the highjacked session account, which could include administrator privileges on the device. The vulnerability is due to the use of weak entropy generation for session identifier values. An attacker could exploit this vulnerability to determine a current session identifier through brute force and reuse that session identifier to take over an ongoing session. In this way, an attacker could take actions within the management interface with privileges up to the level of the administrative user.
How severe is CVE-2020-3297?
CVE-2020-3297 has a CVSS score of 9.8/10 (CRITICAL severity). The EPSS model estimates a 3.04% probability of exploitation in the next 30 days.
How do I fix CVE-2020-3297?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2020-3297?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST