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CVE-2021-1433

HIGHCVSS 8.1/10EPSS 2.26%

Last modified

CVE-2021-1433 is a high-severity vulnerability rated 8.1/10 on the CVSS scale. A vulnerability in the vDaemon process in Cisco IOS XE SD-WAN Software could allow an unauthenticated, remote attacker to cause a buffer overflow on an affected device. This vulnerability is due to insufficient bounds checking when the device processes traffic. EPSS estimates a 2.26% chance of exploitation in the next 30 days.

Description

A vulnerability in the vDaemon process in Cisco IOS XE SD-WAN Software could allow an unauthenticated, remote attacker to cause a buffer overflow on an affected device. This vulnerability is due to insufficient bounds checking when the device processes traffic. An attacker could exploit this vulnerability by sending crafted traffic to the device. The attacker must have a man-in-the-middle position between Cisco vManage and an associated device that is running an affected version of Cisco IOS XE SD-WAN Software. An exploit could allow the attacker to conduct a controllable buffer overflow attack (and possibly execute arbitrary commands as the root user) or cause a device reload, resulting in a denial of service (DoS) condition.

Metrics

CVSS 3.1
8.1/10

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

EPSS Probability
2.26%

80.7th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

VendorProductVersions
CiscoIos Xe3.15.1xbs
CiscoIos Xe3.15.2xbs
CiscoIos Xe16.12.1
CiscoIos Xe16.12.1a
CiscoIos Xe16.12.1c
CiscoIos Xe16.12.1s
CiscoIos Xe16.12.1t
CiscoIos Xe16.12.1w
CiscoIos Xe16.12.1x
CiscoIos Xe16.12.1y
CiscoIos Xe16.12.1z
CiscoIos Xe16.12.1za
CiscoIos Xe16.12.2
CiscoIos Xe16.12.2a
CiscoIos Xe16.12.2s
CiscoIos Xe16.12.2t
CiscoIos Xe16.12.3
CiscoIos Xe16.12.3a
CiscoIos Xe16.12.3s
CiscoIos Xe17.2.1
CiscoIos Xe17.2.1a
CiscoIos Xe17.2.1r
CiscoIos Xe17.2.1v

References

Timeline

Published
Last Modified
Status
Modified

Frequently Asked Questions

What is CVE-2021-1433?
A vulnerability in the vDaemon process in Cisco IOS XE SD-WAN Software could allow an unauthenticated, remote attacker to cause a buffer overflow on an affected device. This vulnerability is due to insufficient bounds checking when the device processes traffic. An attacker could exploit this vulnerability by sending crafted traffic to the device. The attacker must have a man-in-the-middle position between Cisco vManage and an associated device that is running an affected version of Cisco IOS XE SD-WAN Software. An exploit could allow the attacker to conduct a controllable buffer overflow attack (and possibly execute arbitrary commands as the root user) or cause a device reload, resulting in a denial of service (DoS) condition.
How severe is CVE-2021-1433?
CVE-2021-1433 has a CVSS score of 8.1/10 (HIGH severity). The EPSS model estimates a 2.26% probability of exploitation in the next 30 days.
How do I fix CVE-2021-1433?
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-2021-1433?

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

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Source: NVD / NIST