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CVE-2024-20436

HIGHCVSS 7.5/10EPSS 0.87%

Last modified

CVE-2024-20436 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. A vulnerability in the HTTP Server feature of Cisco IOS XE Software when the Telephony Service feature is enabled could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on an affected device. This vulnerability is due to a null pointer dereference when accessing specific URLs. An attacker could exploit this vulnerability by sending crafted HTTP traffic to an affected device. EPSS estimates a 0.87% chance of exploitation in the next 30 days.

Description

A vulnerability in the HTTP Server feature of Cisco IOS XE Software when the Telephony Service feature is enabled could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on an affected device. This vulnerability is due to a null pointer dereference when accessing specific URLs. An attacker could exploit this vulnerability by sending crafted HTTP traffic to an affected device. A successful exploit could allow the attacker to cause the affected device to reload, causing a DoS condition on the affected device.

Metrics

CVSS 3.1
7.5/10

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

EPSS Probability
0.87%

54.0th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

VendorProductVersions
CiscoIos Xe3.9.0as
CiscoIos Xe3.9.1s
CiscoIos Xe3.9.2s
CiscoIos Xe3.10.0s
CiscoIos Xe3.10.1s
CiscoIos Xe3.10.2s
CiscoIos Xe3.10.2ts
CiscoIos Xe3.10.3s
CiscoIos Xe3.10.4s
CiscoIos Xe3.10.5s
CiscoIos Xe3.10.6s
CiscoIos Xe3.10.7s
CiscoIos Xe3.10.8as
CiscoIos Xe3.10.8s
CiscoIos Xe3.10.9s
CiscoIos Xe3.10.10s
CiscoIos Xe3.11.0s
CiscoIos Xe3.11.1s
CiscoIos Xe3.11.2s
CiscoIos Xe3.11.3s
CiscoIos Xe3.11.4s
CiscoIos Xe3.12.0s
CiscoIos Xe3.12.1s
CiscoIos Xe3.12.2s
CiscoIos Xe3.12.3s
CiscoIos Xe3.12.4s
CiscoIos Xe3.13.0s
CiscoIos Xe3.13.1s
CiscoIos Xe3.13.2s
CiscoIos Xe3.13.3s
CiscoIos Xe3.13.4s
CiscoIos Xe3.13.5s
CiscoIos Xe3.13.6as
CiscoIos Xe3.13.6s
CiscoIos Xe3.13.7s
CiscoIos Xe3.13.8s
CiscoIos Xe3.13.9s
CiscoIos Xe3.13.10s
CiscoIos Xe3.14.0s
CiscoIos Xe3.14.1s
CiscoIos Xe3.14.2s
CiscoIos Xe3.14.3s
CiscoIos Xe3.14.4s
CiscoIos Xe3.15.0s
CiscoIos Xe3.15.1cs
CiscoIos Xe3.15.1s
CiscoIos Xe3.15.2s
CiscoIos Xe3.15.3s
CiscoIos Xe3.15.4s
CiscoIos Xe3.16.0cs

Showing 50 of 201 affected configurations. See NVD for the full list.

References

Timeline

Published
Last Modified
Status
Analyzed

Frequently Asked Questions

What is CVE-2024-20436?
A vulnerability in the HTTP Server feature of Cisco IOS XE Software when the Telephony Service feature is enabled could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on an affected device. This vulnerability is due to a null pointer dereference when accessing specific URLs. An attacker could exploit this vulnerability by sending crafted HTTP traffic to an affected device. A successful exploit could allow the attacker to cause the affected device to reload, causing a DoS condition on the affected device.
How severe is CVE-2024-20436?
CVE-2024-20436 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 0.87% probability of exploitation in the next 30 days.
How do I fix CVE-2024-20436?
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-2024-20436?

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

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Source: NVD / NIST