JuniperVULNRICHMENT:CVE-2024-21610CVE-2024-21610 Junos OS: MX Series: In a scaled subscriber scenario if CoS information is gathered mgd processes gets stuck
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
LOW
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L
CVSS4
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/SC:N/VI:N/SI:N/VA:L/SA:N
AI Score
Confidence
High
SSVC
Exploitation
none
Automatable
no
Technical Impact
partial
An Improper Handling of Exceptional Conditions vulnerability in the Class of Service daemon (cosd) of Juniper Networks Junos OS on MX Series allows an authenticated, network-based attacker with low privileges to cause a limited Denial of Service (DoS).
In a scaled subscriber scenario when specific low privileged commands, received over NETCONF, SSH or telnet, are handled by cosd on behalf of mgd, the respective child management daemon (mgd) processes will get stuck. In case of (Netconf over) SSH this leads to stuck SSH sessions, so that when the connection-limit for SSH is reached new sessions can’t be established anymore. A similar behavior will be seen for telnet etc.
Stuck mgd processes can be monitored by executing the following command:
user@host> show system processes extensive | match mgd | match sbwait
This issue affects Juniper Networks Junos OS on MX Series:
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 22.4R3;
23.2 versions earlier than 23.2R1-S2, 23.2R2.
CNA Affected
[
{
"vendor": "Juniper Networks",
"product": "Junos OS",
"versions": [
{
"status": "affected",
"version": "0",
"lessThan": "20.4R3-S9",
"versionType": "semver"
},
{
"status": "affected",
"version": "21.2",
"lessThan": "21.2R3-S7",
"versionType": "semver"
},
{
"status": "affected",
"version": "21.3",
"lessThan": "21.3R3-S5",
"versionType": "semver"
},
{
"status": "affected",
"version": "21.4",
"lessThan": "21.4R3-S5",
"versionType": "semver"
},
{
"status": "affected",
"version": "22.1",
"lessThan": "22.1R3-S4",
"versionType": "semver"
},
{
"status": "affected",
"version": "22.2",
"lessThan": "22.2R3-S3",
"versionType": "semver"
},
{
"status": "affected",
"version": "22.3",
"lessThan": "22.3R3-S2",
"versionType": "semver"
},
{
"status": "affected",
"version": "22.4",
"lessThan": "22.4R3",
"versionType": "semver"
},
{
"status": "affected",
"version": "23.2",
"lessThan": "23.2R1-S2, 23.2R2",
"versionType": "semver"
}
],
"platforms": [
"MX Series"
],
"defaultStatus": "unaffected"
}
]Related
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
LOW
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L
CVSS4
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/SC:N/VI:N/SI:N/VA:L/SA:N
AI Score
Confidence
High
SSVC
Exploitation
none
Automatable
no
Technical Impact
partial