JuniperCVELIST:CVE-2023-36842CVE-2023-36842 Junos OS: jdhcpd will hang on receiving a specific DHCP packet
6.5 Medium
CVSS3
Attack Vector
ADJACENT
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
0.0005 Low
EPSS
Percentile
18.0%
An Improper Check for Unusual or Exceptional Conditions vulnerability in Juniper DHCP Daemon (jdhcpd) of Juniper Networks Junos OS allows an adjacent, unauthenticated attacker to cause the jdhcpd to consume all the CPU cycles resulting in a Denial of Service (DoS).
On Junos OS devices with forward-snooped-client configured, if an attacker sends a specific DHCP packet to a non-configured interface, this will cause an infinite loop. The DHCP process will have to be restarted to recover the service.
This issue affects:
Juniper Networks Junos OS
- All versions earlier than 20.4R3-S9;
- 21.2 versions earlier than 21.2R3-S7;
- 21.3 versions earlier than 21.3R3-S5;
- 21.4 versions earlier than 21.4R3-S5;
- 22.1 versions earlier than 22.1R3-S4;
- 22.2 versions earlier than 22.2R3-S3;
- 22.3 versions earlier than 22.3R3-S2;
- 22.4 versions earlier than 22.4R2-S2, 22.4R3;
- 23.2 versions earlier than 23.2R2.
CNA Affected
[
{
"defaultStatus": "unaffected",
"platforms": [
"MX Series",
"EX Series"
],
"product": "Junos OS",
"vendor": "Juniper Networks",
"versions": [
{
"lessThan": "20.4R3-S9",
"status": "affected",
"version": "0",
"versionType": "semver"
},
{
"lessThan": "21.2R3-S7",
"status": "affected",
"version": "21.2",
"versionType": "semver"
},
{
"lessThan": "21.3R3-S5",
"status": "affected",
"version": "21.3",
"versionType": "semver"
},
{
"lessThan": "21.4R3-S5",
"status": "affected",
"version": "21.4",
"versionType": "semver"
},
{
"lessThan": "22.1R3-S4",
"status": "affected",
"version": "22.1",
"versionType": "semver"
},
{
"lessThan": "22.2R3-S3",
"status": "affected",
"version": "22.2",
"versionType": "semver"
},
{
"lessThan": "22.3R3-S2",
"status": "affected",
"version": "22.3",
"versionType": "semver"
},
{
"lessThan": "22.4R2-S2, 22.4R3",
"status": "affected",
"version": "22.4",
"versionType": "semver"
},
{
"lessThan": "23.2R2",
"status": "affected",
"version": "23.2",
"versionType": "semver"
}
]
}
]Related
6.5 Medium
CVSS3
Attack Vector
ADJACENT
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
0.0005 Low
EPSS
Percentile
18.0%