5.3

CVE-2024-20266

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.
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Produkt ios_xr_software
Default Statusunknown
Version 5.2.0
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Version 5.2.1
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Version 5.2.2
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Version 5.2.4
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Version 5.2.3
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Version 5.2.5
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Version 5.2.47
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Version 5.3.0
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Version 5.3.1
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Version 5.3.2
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Version 5.3.3
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Version 5.3.4
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Version 6.0.0
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Version 6.0.1
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Version 6.0.2
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Version 6.1.1
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Version 6.1.2
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Version 6.1.3
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Version 6.1.4
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Version 6.1.12
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Version 6.1.22
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Version 6.1.32
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Version 6.1.36
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Version 6.1.42
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Version 6.2.1
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Version 6.2.2
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Version 6.2.3
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Version 6.2.25
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Version 6.2.11
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Version 6.3.2
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Version 6.3.3
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Version 6.3.15
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Version 6.4.1
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Version 6.4.2
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Version 6.4.3
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Version 6.5.1
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Version 6.5.2
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Version 6.5.3
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Version 6.5.25
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Version 6.5.26
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Version 6.5.28
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Version 6.5.29
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Version 6.5.32
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Version 6.5.33
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Version 6.6.2
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Version 6.6.3
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Version 6.6.25
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Version 6.6.4
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Version 7.0.1
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Version 7.0.2
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Version 7.0.12
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Version 7.0.14
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Version 7.1.1
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Version 7.1.15
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Version 7.1.2
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Version 7.1.3
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Version 6.7.1
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Version 6.7.2
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Version 6.7.3
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Version 6.7.4
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Version 7.2.0
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Version 7.2.1
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Version 7.2.2
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Version 7.3.1
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Version 7.3.15
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Version 7.3.2
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Version 7.3.3
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Version 7.3.5
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Version 7.4.1
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Version 7.4.2
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Version 6.8.1
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Version 6.8.2
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Version 7.5.1
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Version 7.5.3
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Version 7.5.2
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Version 7.5.4
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Version 7.5.5
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Version 7.6.1
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Version 7.6.2
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Version 7.7.1
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Version 7.7.2
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Version 7.7.21
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Version 6.9.1
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Version 6.9.2
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Version 7.8.1
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Version 7.8.2
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Version 7.9.1
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Version 7.9.2
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Version 7.9.21
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Version 7.10.1
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Version 7.10.2
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Zu dieser CVE wurde keine CISA KEV oder CERT.AT-Warnung gefunden.
EPSS Metriken
Typ Quelle Score Percentile
EPSS FIRST.org 0.09% 0.268
CVSS Metriken
Quelle Base Score Exploit Score Impact Score Vector String
psirt@cisco.com 5.3 3.9 1.4
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
CWE-476 NULL Pointer Dereference

The product dereferences a pointer that it expects to be valid but is NULL.