Strix
26.1K

CVE-2024-20263

HIGHCVSS 7.2/10EPSS 0.45%

Last modified

CVE-2024-20263 is a high-severity vulnerability rated 7.2/10 on the CVSS scale. A vulnerability with the access control list (ACL) management within a stacked switch configuration of Cisco Business 250 Series Smart Switches and Business 350 Series Managed Switches could allow an unauthenticated, remote attacker to bypass protection offered by a configured ACL on an affected device. This vulnerability is due to incorrect processing of ACLs on a stacked configuration when either the primary or backup switches experience a full stack reload or power cycle. EPSS estimates a 0.45% chance of exploitation in the next 30 days.

Description

A vulnerability with the access control list (ACL) management within a stacked switch configuration of Cisco Business 250 Series Smart Switches and Business 350 Series Managed Switches could allow an unauthenticated, remote attacker to bypass protection offered by a configured ACL on an affected device. This vulnerability is due to incorrect processing of ACLs on a stacked configuration when either the primary or backup switches experience a full stack reload or power cycle. An attacker could exploit this vulnerability by sending crafted traffic through an affected device. A successful exploit could allow the attacker to bypass configured ACLs, causing traffic to be dropped or forwarded in an unexpected manner. The attacker does not have control over the conditions that result in the device being in the vulnerable state. Note: In the vulnerable state, the ACL would be correctly applied on the primary devices but could be incorrectly applied to the backup devices.

Metrics

CVSS 3.1
7.2/10

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

EPSS Probability
0.45%

35.9th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

VendorProductVersions
CiscoCbs250-8t-D Firmware>= 3.4, < 3.4.0.17
CiscoCbs250-8pp-D Firmware>= 3.4, < 3.4.0.17
CiscoCbs250-8t-E-2g Firmware>= 3.4, < 3.4.0.17
CiscoCbs250-8pp-E-2g Firmware>= 3.4, < 3.4.0.17
CiscoCbs250-8p-E-2g Firmware>= 3.4, < 3.4.0.17
CiscoCbs250-8fp-E-2g Firmware>= 3.4, < 3.4.0.17
CiscoCbs250-16t-2g Firmware>= 3.4, < 3.4.0.17
CiscoCbs250-16p-2g Firmware>= 3.4, < 3.4.0.17
CiscoCbs250-24t-4g Firmware>= 3.4, < 3.4.0.17
CiscoCbs250-24pp-4g Firmware>= 3.4, < 3.4.0.17
CiscoCbs250-24p-4g Firmware>= 3.4, < 3.4.0.17
CiscoCbs250-24fp-4g Firmware>= 3.4, < 3.4.0.17
CiscoCbs250-48t-4g Firmware>= 3.4, < 3.4.0.17
CiscoCbs250-48pp-4g Firmware>= 3.4, < 3.4.0.17
CiscoCbs250-48p-4g Firmware>= 3.4, < 3.4.0.17
CiscoCbs250-24t-4x Firmware>= 3.4, < 3.4.0.17
CiscoCbs250-24p-4x Firmware>= 3.4, < 3.4.0.17
CiscoCbs250-24fp-4x Firmware>= 3.4, < 3.4.0.17
CiscoCbs250-48t-4x Firmware>= 3.4, < 3.4.0.17
CiscoCbs250-48p-4x Firmware>= 3.4, < 3.4.0.17
CiscoCbs350-8t-E-2g Firmware>= 3.4, < 3.4.0.17
CiscoCbs350-8p-2g Firmware>= 3.4, < 3.4.0.17
CiscoCbs350-8p-E-2g Firmware>= 3.4, < 3.4.0.17
CiscoCbs350-8fp-2g Firmware>= 3.4, < 3.4.0.17
CiscoCbs350-8fp-E-2g Firmware>= 3.4, < 3.4.0.17
CiscoCbs350-8s-E-2g Firmware>= 3.4, < 3.4.0.17
CiscoCbs350-16t-2g Firmware>= 3.4, < 3.4.0.17
CiscoCbs350-16t-E-2g Firmware>= 3.4, < 3.4.0.17
CiscoCbs350-16p-2g Firmware>= 3.4, < 3.4.0.17
CiscoCbs350-16p-E-2g Firmware>= 3.4, < 3.4.0.17
CiscoCbs350-16fp-2g Firmware>= 3.4, < 3.4.0.17
CiscoCbs350-24t-4g Firmware>= 3.4, < 3.4.0.17
CiscoCbs350-24p-4g Firmware>= 3.4, < 3.4.0.17
CiscoCbs350-24fp-4g Firmware>= 3.4, < 3.4.0.17
CiscoCbs350-24s-4g Firmware>= 3.4, < 3.4.0.17
CiscoCbs350-48t-4g Firmware>= 3.4, < 3.4.0.17
CiscoCbs350-48p-4g Firmware>= 3.4, < 3.4.0.17
CiscoCbs350-48fp-4g Firmware>= 3.4, < 3.4.0.17
CiscoCbs350-24t-4x Firmware>= 3.4, < 3.4.0.17
CiscoCbs350-24p-4x Firmware>= 3.4, < 3.4.0.17
CiscoCbs350-24fp-4x Firmware>= 3.4, < 3.4.0.17
CiscoCbs350-48t-4x Firmware>= 3.4, < 3.4.0.17
CiscoCbs350-48p-4x Firmware>= 3.4, < 3.4.0.17
CiscoCbs350-48fp-4x Firmware>= 3.4, < 3.4.0.17
CiscoCbs350-8mgp-2x Firmware>= 3.4, < 3.4.0.17
CiscoCbs350-8mp-2x Firmware>= 3.4, < 3.4.0.17
CiscoCbs350-24mgp-4x Firmware>= 3.4, < 3.4.0.17
CiscoCbs350-12np-4x Firmware>= 3.4, < 3.4.0.17
CiscoCbs350-24ngp-4x Firmware>= 3.4, < 3.4.0.17
CiscoCbs350-48ngp-4x Firmware>= 3.4, < 3.4.0.17

Showing 50 of 143 affected configurations. See NVD for the full list.

References

Timeline

Published
Last Modified
Status
Modified

Frequently Asked Questions

What is CVE-2024-20263?
A vulnerability with the access control list (ACL) management within a stacked switch configuration of Cisco Business 250 Series Smart Switches and Business 350 Series Managed Switches could allow an unauthenticated, remote attacker to bypass protection offered by a configured ACL on an affected device. This vulnerability is due to incorrect processing of ACLs on a stacked configuration when either the primary or backup switches experience a full stack reload or power cycle. An attacker could exploit this vulnerability by sending crafted traffic through an affected device. A successful exploit could allow the attacker to bypass configured ACLs, causing traffic to be dropped or forwarded in an unexpected manner. The attacker does not have control over the conditions that result in the device being in the vulnerable state. Note: In the vulnerable state, the ACL would be correctly applied on the primary devices but could be incorrectly applied to the backup devices.
How severe is CVE-2024-20263?
CVE-2024-20263 has a CVSS score of 7.2/10 (HIGH severity). The EPSS model estimates a 0.45% probability of exploitation in the next 30 days.
How do I fix CVE-2024-20263?
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-2024-20263?

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

Scan your code now

Source: NVD / NIST