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CVE-2021-1403

HIGHCVSS 7.4/10EPSS 0.60%

Last modified

CVE-2021-1403 is a high-severity vulnerability rated 7.4/10 on the CVSS scale. A vulnerability in the web UI feature of Cisco IOS XE Software could allow an unauthenticated, remote attacker to conduct a cross-site WebSocket hijacking (CSWSH) attack and cause a denial of service (DoS) condition on an affected device. This vulnerability is due to insufficient HTTP protections in the web UI on an affected device. EPSS estimates a 0.60% chance of exploitation in the next 30 days.

Description

A vulnerability in the web UI feature of Cisco IOS XE Software could allow an unauthenticated, remote attacker to conduct a cross-site WebSocket hijacking (CSWSH) attack and cause a denial of service (DoS) condition on an affected device. This vulnerability is due to insufficient HTTP protections in the web UI on an affected device. An attacker could exploit this vulnerability by persuading an authenticated user of the web UI to follow a crafted link. A successful exploit could allow the attacker to corrupt memory on the affected device, forcing it to reload and causing a DoS condition.

Metrics

CVSS 3.1
7.4/10

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

EPSS Probability
0.60%

44.2th 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 Xe16.3.1
CiscoIos Xe16.3.1a
CiscoIos Xe16.3.2
CiscoIos Xe16.3.3
CiscoIos Xe16.3.4
CiscoIos Xe16.3.5
CiscoIos Xe16.3.5b
CiscoIos Xe16.3.6
CiscoIos Xe16.3.7
CiscoIos Xe16.3.8
CiscoIos Xe16.3.9
CiscoIos Xe16.3.10
CiscoIos Xe16.3.11
CiscoIos Xe16.4.1
CiscoIos Xe16.4.2
CiscoIos Xe16.4.3
CiscoIos Xe16.5.1
CiscoIos Xe16.5.1a
CiscoIos Xe16.5.1b
CiscoIos Xe16.5.2
CiscoIos Xe16.5.3
CiscoIos Xe16.6.1
CiscoIos Xe16.6.2
CiscoIos Xe16.6.3
CiscoIos Xe16.6.4
CiscoIos Xe16.6.4a
CiscoIos Xe16.6.4s
CiscoIos Xe16.6.5
CiscoIos Xe16.6.5a
CiscoIos Xe16.6.5b
CiscoIos Xe16.6.6
CiscoIos Xe16.6.7
CiscoIos Xe16.6.7a
CiscoIos Xe16.6.8
CiscoIos Xe16.7.1
CiscoIos Xe16.7.1a
CiscoIos Xe16.7.1b
CiscoIos Xe16.7.2
CiscoIos Xe16.7.3
CiscoIos Xe16.7.4
CiscoIos Xe16.8.1
CiscoIos Xe16.8.1a
CiscoIos Xe16.8.1b
CiscoIos Xe16.8.1c
CiscoIos Xe16.8.1d
CiscoIos Xe16.8.1e
CiscoIos Xe16.8.1s
CiscoIos Xe16.8.2

Showing 50 of 123 affected configurations. See NVD for the full list.

References

Timeline

Published
Last Modified
Status
Modified

Frequently Asked Questions

What is CVE-2021-1403?
A vulnerability in the web UI feature of Cisco IOS XE Software could allow an unauthenticated, remote attacker to conduct a cross-site WebSocket hijacking (CSWSH) attack and cause a denial of service (DoS) condition on an affected device. This vulnerability is due to insufficient HTTP protections in the web UI on an affected device. An attacker could exploit this vulnerability by persuading an authenticated user of the web UI to follow a crafted link. A successful exploit could allow the attacker to corrupt memory on the affected device, forcing it to reload and causing a DoS condition.
How severe is CVE-2021-1403?
CVE-2021-1403 has a CVSS score of 7.4/10 (HIGH severity). The EPSS model estimates a 0.60% probability of exploitation in the next 30 days.
How do I fix CVE-2021-1403?
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-2021-1403?

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

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Source: NVD / NIST