Loading HuntDB...
Hunt
Vulnerability Intelligence by wss.sh
Home Daily Briefings High Impact CVEs Recent Exploits KEV Catalog GitHub Advisories Latest Updates Security News
Sign In Sign Up

CVE-2024-20266

MEDIUM
Published 2024-03-13T16:42:27.815Z
Actions:

Expert Analysis

Professional remediation guidance

Get tailored security recommendations from our analyst team for CVE-2024-20266. We'll provide specific mitigation strategies based on your environment and risk profile.

CVSS Score

V3.1
5.3
/10
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
Base Score Metrics
Exploitability: N/A Impact: N/A

EPSS Score

v2025.03.14
0.001
probability
of exploitation in the wild

There is a 0.1% chance that this vulnerability will be exploited in the wild within the next 30 days.

Updated: 2025-06-25
Exploit Probability
Percentile: 0.274
Higher than 27.4% of all CVEs

Attack Vector Metrics

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED

Impact Metrics

Confidentiality
NONE
Integrity
NONE
Availability
LOW

Description

A vulnerability in the DHCP version 4 (DHCPv4) server feature of Cisco IOS XR Software could allow an unauthenticated, remote attacker to trigger a crash of the dhcpd process, resulting in a denial of service (DoS) condition.

This vulnerability exists because certain DHCPv4 messages are improperly validated when they are processed by an affected device. An attacker could exploit this vulnerability by sending a malformed DHCPv4 message to an affected device. A successful exploit could allow the attacker to cause a crash of the dhcpd process. While the dhcpd process is restarting, which may take approximately two minutes, DHCPv4 server services are unavailable on the affected device. This could temporarily prevent network access to clients that join the network during that time period and rely on the DHCPv4 server of the affected device.

Notes:


Only the dhcpd process crashes and eventually restarts automatically. The router does not reload.
This vulnerability only applies to DHCPv4. DHCP version 6 (DHCPv6) is not affected.

Available Exploits

No exploits available for this CVE.

Related News

No news articles found for this CVE.

Affected Products

Cisco

Cisco IOS XR Software

Affected Versions:

5.2.0 5.2.1 5.2.2 5.2.4 5.2.3 5.2.5 5.2.47 5.3.0 5.3.1 5.3.2 5.3.3 5.3.4 6.0.0 6.0.1 6.0.2 6.1.1 6.1.2 6.1.3 6.1.4 6.1.12 6.1.22 6.1.32 6.1.36 6.1.42 6.2.1 6.2.2 6.2.3 6.2.25 6.2.11 6.3.2 6.3.3 6.3.15 6.4.1 6.4.2 6.4.3 6.5.1 6.5.2 6.5.3 6.5.25 6.5.26 6.5.28 6.5.29 6.5.32 6.5.33 6.6.2 6.6.3 6.6.25 6.6.4 7.0.1 7.0.2 7.0.12 7.0.14 7.1.1 7.1.15 7.1.2 7.1.3 6.7.1 6.7.2 6.7.3 6.7.4 7.2.0 7.2.1 7.2.2 7.3.1 7.3.15 7.3.2 7.3.3 7.3.5 7.4.1 7.4.2 6.8.1 6.8.2 7.5.1 7.5.3 7.5.2 7.5.4 7.5.5 7.6.1 7.6.2 7.7.1 7.7.2 7.7.21 6.9.1 6.9.2 7.8.1 7.8.2 7.9.1 7.9.2 7.9.21 7.10.1 7.10.2
cisco

ios_xr_software

Affected Versions:

5.2.0 5.2.1 5.2.2 5.2.4 5.2.3 5.2.5 5.2.47 5.3.0 5.3.1 5.3.2 5.3.3 5.3.4 6.0.0 6.0.1 6.0.2 6.1.1 6.1.2 6.1.3 6.1.4 6.1.12 6.1.22 6.1.32 6.1.36 6.1.42 6.2.1 6.2.2 6.2.3 6.2.25 6.2.11 6.3.2 6.3.3 6.3.15 6.4.1 6.4.2 6.4.3 6.5.1 6.5.2 6.5.3 6.5.25 6.5.26 6.5.28 6.5.29 6.5.32 6.5.33 6.6.2 6.6.3 6.6.25 6.6.4 7.0.1 7.0.2 7.0.12 7.0.14 7.1.1 7.1.15 7.1.2 7.1.3 6.7.1 6.7.2 6.7.3 6.7.4 7.2.0 7.2.1 7.2.2 7.3.1 7.3.15 7.3.2 7.3.3 7.3.5 7.4.1 7.4.2 6.8.1 6.8.2 7.5.1 7.5.3 7.5.2 7.5.4 7.5.5 7.6.1 7.6.2 7.7.1 7.7.2 7.7.21 6.9.1 6.9.2 7.8.1 7.8.2 7.9.1 7.9.2 7.9.21 7.10.1 7.10.2

GitHub Security Advisories

Community-driven vulnerability intelligence from GitHub

⚠ Unreviewed MODERATE

GHSA-v32f-g8j8-65f7

Advisory Details

A vulnerability in the DHCP version 4 (DHCPv4) server feature of Cisco IOS XR Software could allow an unauthenticated, remote attacker to trigger a crash of the dhcpd process, resulting in a denial of service (DoS) condition. This vulnerability exists because certain DHCPv4 messages are improperly validated when they are processed by an affected device. An attacker could exploit this vulnerability by sending a malformed DHCPv4 message to an affected device. A successful exploit could allow the attacker to cause a crash of the dhcpd process. While the dhcpd process is restarting, which may take approximately two minutes, DHCPv4 server services are unavailable on the affected device. This could temporarily prevent network access to clients that join the network during that time period and rely on the DHCPv4 server of the affected device. Notes: Only the dhcpd process crashes and eventually restarts automatically. The router does not reload. This vulnerability only applies to DHCPv4. DHCP version 6 (DHCPv6) is not affected.

CVSS Scoring

CVSS Score

5.0

CVSS Vector

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

References

ADVISORY https://nvd.nist.gov/vuln/detail/CVE-2024-20266
WEB https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-iosxr-dhcp-dos-3tgPKRdm

Advisory provided by GitHub Security Advisory Database. Published: March 13, 2024, Modified: March 13, 2024

References

https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-iosxr-dhcp-dos-3tgPKRdm
Published: 2024-03-13T16:42:27.815Z
Last Modified: 2024-08-14T15:00:38.372Z
Copied to clipboard!