CVE-2024-20266
5.3 Medium
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
LOW
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
5.5 Medium
AI Score
Confidence
High
0.0004 Low
EPSS
Percentile
9.1%
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.
CNA Affected
[
{
"vendor": "Cisco",
"product": "Cisco IOS XR Software",
"versions": [
{
"version": "5.2.0",
"status": "affected"
},
{
"version": "5.2.1",
"status": "affected"
},
{
"version": "5.2.2",
"status": "affected"
},
{
"version": "5.2.4",
"status": "affected"
},
{
"version": "5.2.3",
"status": "affected"
},
{
"version": "5.2.5",
"status": "affected"
},
{
"version": "5.2.47",
"status": "affected"
},
{
"version": "5.3.0",
"status": "affected"
},
{
"version": "5.3.1",
"status": "affected"
},
{
"version": "5.3.2",
"status": "affected"
},
{
"version": "5.3.3",
"status": "affected"
},
{
"version": "5.3.4",
"status": "affected"
},
{
"version": "6.0.0",
"status": "affected"
},
{
"version": "6.0.1",
"status": "affected"
},
{
"version": "6.0.2",
"status": "affected"
},
{
"version": "6.1.1",
"status": "affected"
},
{
"version": "6.1.2",
"status": "affected"
},
{
"version": "6.1.3",
"status": "affected"
},
{
"version": "6.1.4",
"status": "affected"
},
{
"version": "6.1.12",
"status": "affected"
},
{
"version": "6.1.22",
"status": "affected"
},
{
"version": "6.1.32",
"status": "affected"
},
{
"version": "6.1.36",
"status": "affected"
},
{
"version": "6.1.42",
"status": "affected"
},
{
"version": "6.2.1",
"status": "affected"
},
{
"version": "6.2.2",
"status": "affected"
},
{
"version": "6.2.3",
"status": "affected"
},
{
"version": "6.2.25",
"status": "affected"
},
{
"version": "6.2.11",
"status": "affected"
},
{
"version": "6.3.2",
"status": "affected"
},
{
"version": "6.3.3",
"status": "affected"
},
{
"version": "6.3.15",
"status": "affected"
},
{
"version": "6.4.1",
"status": "affected"
},
{
"version": "6.4.2",
"status": "affected"
},
{
"version": "6.4.3",
"status": "affected"
},
{
"version": "6.5.1",
"status": "affected"
},
{
"version": "6.5.2",
"status": "affected"
},
{
"version": "6.5.3",
"status": "affected"
},
{
"version": "6.5.25",
"status": "affected"
},
{
"version": "6.5.26",
"status": "affected"
},
{
"version": "6.5.28",
"status": "affected"
},
{
"version": "6.5.29",
"status": "affected"
},
{
"version": "6.5.32",
"status": "affected"
},
{
"version": "6.5.33",
"status": "affected"
},
{
"version": "6.6.2",
"status": "affected"
},
{
"version": "6.6.3",
"status": "affected"
},
{
"version": "6.6.25",
"status": "affected"
},
{
"version": "6.6.4",
"status": "affected"
},
{
"version": "7.0.1",
"status": "affected"
},
{
"version": "7.0.2",
"status": "affected"
},
{
"version": "7.0.12",
"status": "affected"
},
{
"version": "7.0.14",
"status": "affected"
},
{
"version": "7.1.1",
"status": "affected"
},
{
"version": "7.1.15",
"status": "affected"
},
{
"version": "7.1.2",
"status": "affected"
},
{
"version": "7.1.3",
"status": "affected"
},
{
"version": "6.7.1",
"status": "affected"
},
{
"version": "6.7.2",
"status": "affected"
},
{
"version": "6.7.3",
"status": "affected"
},
{
"version": "6.7.4",
"status": "affected"
},
{
"version": "7.2.0",
"status": "affected"
},
{
"version": "7.2.1",
"status": "affected"
},
{
"version": "7.2.2",
"status": "affected"
},
{
"version": "7.3.1",
"status": "affected"
},
{
"version": "7.3.15",
"status": "affected"
},
{
"version": "7.3.2",
"status": "affected"
},
{
"version": "7.3.3",
"status": "affected"
},
{
"version": "7.3.5",
"status": "affected"
},
{
"version": "7.4.1",
"status": "affected"
},
{
"version": "7.4.2",
"status": "affected"
},
{
"version": "6.8.1",
"status": "affected"
},
{
"version": "6.8.2",
"status": "affected"
},
{
"version": "7.5.1",
"status": "affected"
},
{
"version": "7.5.3",
"status": "affected"
},
{
"version": "7.5.2",
"status": "affected"
},
{
"version": "7.5.4",
"status": "affected"
},
{
"version": "7.5.5",
"status": "affected"
},
{
"version": "7.6.1",
"status": "affected"
},
{
"version": "7.6.2",
"status": "affected"
},
{
"version": "7.7.1",
"status": "affected"
},
{
"version": "7.7.2",
"status": "affected"
},
{
"version": "7.7.21",
"status": "affected"
},
{
"version": "6.9.1",
"status": "affected"
},
{
"version": "6.9.2",
"status": "affected"
},
{
"version": "7.8.1",
"status": "affected"
},
{
"version": "7.8.2",
"status": "affected"
},
{
"version": "7.9.1",
"status": "affected"
},
{
"version": "7.9.2",
"status": "affected"
},
{
"version": "7.9.21",
"status": "affected"
},
{
"version": "7.10.1",
"status": "affected"
},
{
"version": "7.10.2",
"status": "affected"
}
]
}
]Related
5.3 Medium
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
LOW
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
5.5 Medium
AI Score
Confidence
High
0.0004 Low
EPSS
Percentile
9.1%