JuniperCVELIST:CVE-2022-22167CVE-2022-22167 Junos OS: SRX Series: If no-syn-check is enabled, traffic classified as UNKNOWN gets permitted by pre-id-default-policy
7.2 High
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
CHANGED
Confidentiality Impact
LOW
Integrity Impact
LOW
Availability Impact
NONE
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N
9.8 High
AI Score
Confidence
High
0.002 Low
EPSS
Percentile
57.5%
A traffic classification vulnerability in Juniper Networks Junos OS on the SRX Series Services Gateways may allow an attacker to bypass Juniper Deep Packet Inspection (JDPI) rules and access unauthorized networks or resources, when ‘no-syn-check’ is enabled on the device. While JDPI correctly classifies out-of-state asymmetric TCP flows as the dynamic-application UNKNOWN, this classification is not provided to the policy module properly and hence traffic continues to use the pre-id-default-policy, which is more permissive, causing the firewall to allow traffic to be forwarded that should have been denied. This issue only occurs when ‘set security flow tcp-session no-syn-check’ is configured on the device. This issue affects Juniper Networks Junos OS on SRX Series: 18.4 versions prior to 18.4R2-S10, 18.4R3-S10; 19.1 versions prior to 19.1R3-S8; 19.2 versions prior to 19.2R1-S8, 19.2R3-S4; 19.3 versions prior to 19.3R3-S3; 19.4 versions prior to 19.4R3-S5; 20.1 versions prior to 20.1R3-S1; 20.2 versions prior to 20.2R3-S2; 20.3 versions prior to 20.3R3-S1; 20.4 versions prior to 20.4R2-S2, 20.4R3; 21.1 versions prior to 21.1R2-S2, 21.1R3; 21.2 versions prior to 21.2R2. This issue does not affect Juniper Networks Junos OS versions prior to 18.4R1.
CNA Affected
[
{
"platforms": [
"SRX Series"
],
"product": "Junos OS",
"vendor": "Juniper Networks",
"versions": [
{
"lessThan": "18.4R2-S10, 18.4R3-S10",
"status": "affected",
"version": "18.4",
"versionType": "custom"
},
{
"lessThan": "19.1R3-S8",
"status": "affected",
"version": "19.1",
"versionType": "custom"
},
{
"lessThan": "19.2R1-S8, 19.2R3-S4",
"status": "affected",
"version": "19.2",
"versionType": "custom"
},
{
"lessThan": "19.3R3-S3",
"status": "affected",
"version": "19.3",
"versionType": "custom"
},
{
"lessThan": "19.4R3-S5",
"status": "affected",
"version": "19.4",
"versionType": "custom"
},
{
"lessThan": "20.1R3-S1",
"status": "affected",
"version": "20.1",
"versionType": "custom"
},
{
"lessThan": "20.2R3-S2",
"status": "affected",
"version": "20.2",
"versionType": "custom"
},
{
"lessThan": "20.3R3-S1",
"status": "affected",
"version": "20.3",
"versionType": "custom"
},
{
"lessThan": "20.4R2-S2, 20.4R3",
"status": "affected",
"version": "20.4",
"versionType": "custom"
},
{
"lessThan": "21.1R2-S2, 21.1R3",
"status": "affected",
"version": "21.1",
"versionType": "custom"
},
{
"lessThan": "21.2R2",
"status": "affected",
"version": "21.2",
"versionType": "custom"
}
]
},
{
"product": "Junos OS",
"vendor": "Juniper Networks",
"versions": [
{
"lessThan": "18.4R1",
"status": "unaffected",
"version": "unspecified",
"versionType": "custom"
}
]
}
]References
Related
7.2 High
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
CHANGED
Confidentiality Impact
LOW
Integrity Impact
LOW
Availability Impact
NONE
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N
9.8 High
AI Score
Confidence
High
0.002 Low
EPSS
Percentile
57.5%