CVE-2023-36838 (GCVE-0-2023-36838)
Vulnerability from cvelistv5 – Published: 2023-07-14 16:26 – Updated: 2024-10-22 14:31
VLAI
EPSS
VEX
Title
Junos OS: SRX Series: A flowd core occurs when running a low privileged CLI command
Summary
An Out-of-bounds Read vulnerability in the flow processing daemon (flowd) of Juniper Networks Junos OS on SRX Series allows a local, authenticated attacker with low privileges, to cause a Denial of Service (DoS).
If a low privileged user executes a specific CLI command, flowd which is responsible for traffic forwarding in SRX crashes and generates a core dump. This will cause temporary traffic interruption until the flowd process is restarted automatically. Continued execution of this command will lead to a sustained DoS.
This issue affects Juniper Networks Junos OS on SRX Series:
All versions prior to 20.2R3-S7;
20.3 version 20.3R1 and later versions;
20.4 versions prior to 20.4R3-S6;
21.1 versions prior to 21.1R3-S5;
21.2 versions prior to 21.2R3-S4;
21.3 versions prior to 21.3R3-S4;
21.4 versions prior to 21.4R3-S3;
22.1 versions prior to 22.1R3-S1;
22.2 versions prior to 22.2R3;
22.3 versions prior to 22.3R2;
22.4 versions prior to 22.4R1-S1, 22.4R2.
Severity
5.5 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2024-10-22 14:28 UTC
CWE
- CWE-125 - Out-of-bounds Read
- Denial of Service (DoS)
Assigner
References
1 reference
Impacted products
1 product
| Vendor | Product | Version | CPE status | |
|---|---|---|---|---|
| Juniper Networks | Junos OS |
Affected:
unspecified , < 20.2R3-S7
(custom)
Affected: 20.3 , < 20.3* (custom) Affected: 20.4 , < 20.4R3-S6 (custom) Affected: 21.1 , < 21.1R3-S5 (custom) Affected: 21.2 , < 21.2R3-S4 (custom) Affected: 21.3 , < 21.3R3-S4 (custom) Affected: 21.4 , < 21.4R3-S3 (custom) Affected: 22.1 , < 22.1R3-S1 (custom) Affected: 22.2 , < 22.2R3 (custom) Affected: 22.3 , < 22.3R2 (custom) Affected: 22.4 , < 22.4R1-S1, 22.4R2 (custom) |
guessed |
Date Public
2022-07-12 16:00
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"descriptions": "[{\"lang\": \"en\", \"value\": \"An Out-of-bounds Read vulnerability in the flow processing daemon (flowd) of Juniper Networks Junos OS on SRX Series allows a local, authenticated attacker with low privileges, to cause a Denial of Service (DoS).\\n\\nIf a low privileged user executes a specific CLI command, flowd which is responsible for traffic forwarding in SRX crashes and generates a core dump. This will cause temporary traffic interruption until the flowd process is restarted automatically. Continued execution of this command will lead to a sustained DoS.\\n\\nThis issue affects Juniper Networks Junos OS on SRX Series:\\nAll versions prior to 20.2R3-S7;\\n20.3 version 20.3R1 and later versions;\\n20.4 versions prior to 20.4R3-S6;\\n21.1 versions prior to 21.1R3-S5;\\n21.2 versions prior to 21.2R3-S4;\\n21.3 versions prior to 21.3R3-S4;\\n21.4 versions prior to 21.4R3-S3;\\n22.1 versions prior to 22.1R3-S1;\\n22.2 versions prior to 22.2R3;\\n22.3 versions prior to 22.3R2;\\n22.4 versions prior to 22.4R1-S1, 22.4R2.\\n\"}]",
"id": "CVE-2023-36838",
"lastModified": "2024-11-21T08:10:42.900",
"metrics": "{\"cvssMetricV31\": [{\"source\": \"sirt@juniper.net\", \"type\": \"Primary\", \"cvssData\": {\"version\": \"3.1\", \"vectorString\": \"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H\", \"baseScore\": 5.5, \"baseSeverity\": \"MEDIUM\", \"attackVector\": \"LOCAL\", \"attackComplexity\": \"LOW\", \"privilegesRequired\": \"LOW\", \"userInteraction\": \"NONE\", \"scope\": \"UNCHANGED\", \"confidentialityImpact\": \"NONE\", \"integrityImpact\": \"NONE\", \"availabilityImpact\": \"HIGH\"}, \"exploitabilityScore\": 1.8, \"impactScore\": 3.6}]}",
"published": "2023-07-14T17:15:09.210",
"references": "[{\"url\": \"https://supportportal.juniper.net/JSA71645\", \"source\": \"sirt@juniper.net\", \"tags\": [\"Vendor Advisory\"]}, {\"url\": \"https://supportportal.juniper.net/JSA71645\", \"source\": \"af854a3a-2127-422b-91ae-364da2661108\", \"tags\": [\"Vendor Advisory\"]}]",
"sourceIdentifier": "sirt@juniper.net",
"vulnStatus": "Modified",
"weaknesses": "[{\"source\": \"sirt@juniper.net\", \"type\": \"Primary\", \"description\": [{\"lang\": \"en\", \"value\": \"CWE-125\"}]}]"
},
"nvd": "{\"cve\":{\"id\":\"CVE-2023-36838\",\"sourceIdentifier\":\"sirt@juniper.net\",\"published\":\"2023-07-14T17:15:09.210\",\"lastModified\":\"2026-06-17T06:07:11.457\",\"vulnStatus\":\"Modified\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"An Out-of-bounds Read vulnerability in the flow processing daemon (flowd) of Juniper Networks Junos OS on SRX Series allows a local, authenticated attacker with low privileges, to cause a Denial of Service (DoS).\\n\\nIf a low privileged user executes a specific CLI command, flowd which is responsible for traffic forwarding in SRX crashes and generates a core dump. This will cause temporary traffic interruption until the flowd process is restarted automatically. 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"redhat_vex": {
"current_release_date": "2025-05-28T22:50:18+00:00",
"cve": "CVE-2023-36838",
"id": "CVE-2023-36838",
"initial_release_date": "2023-01-01T00:00:00+00:00",
"product_status:known_not_affected": "1",
"source": "Red Hat CSAF VEX",
"status": "final",
"title": "Junos OS: SRX Series: A flowd core occurs when running a low privileged CLI command",
"url": "https://security.access.redhat.com/data/csaf/v2/vex/2023/cve-2023-36838.json",
"version": "3"
},
"vulnrichment": {
"containers": "{\"adp\": [{\"title\": \"CVE Program Container\", \"references\": [{\"url\": \"https://supportportal.juniper.net/JSA71645\", \"tags\": [\"x_transferred\"]}], \"providerMetadata\": {\"orgId\": \"af854a3a-2127-422b-91ae-364da2661108\", \"shortName\": \"CVE\", \"dateUpdated\": \"2024-08-02T17:01:09.599Z\"}}, {\"title\": \"CISA ADP Vulnrichment\", \"metrics\": [{\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2023-36838\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"none\"}, {\"Automatable\": \"no\"}, {\"Technical Impact\": \"partial\"}], \"version\": \"2.0.3\", \"timestamp\": \"2024-10-22T14:28:38.076785Z\"}}}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2024-10-22T14:31:40.015Z\"}}], \"cna\": {\"title\": \"Junos OS: SRX Series: A flowd core occurs when running a low privileged CLI command\", \"source\": {\"defect\": [\"1691594\"], \"advisory\": \"JSA71645\", \"discovery\": \"UNKNOWN\"}, \"metrics\": [{\"format\": \"CVSS\", \"cvssV3_1\": {\"scope\": \"UNCHANGED\", \"version\": \"3.1\", \"baseScore\": 5.5, \"attackVector\": \"LOCAL\", \"baseSeverity\": \"MEDIUM\", \"vectorString\": \"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H\", \"integrityImpact\": \"NONE\", \"userInteraction\": \"NONE\", \"attackComplexity\": \"LOW\", \"availabilityImpact\": \"HIGH\", \"privilegesRequired\": \"LOW\", \"confidentialityImpact\": \"NONE\"}, \"scenarios\": [{\"lang\": \"en\", \"value\": \"GENERAL\"}]}], \"affected\": [{\"vendor\": \"Juniper Networks\", \"product\": \"Junos OS\", \"versions\": [{\"status\": \"affected\", \"version\": \"unspecified\", \"lessThan\": \"20.2R3-S7\", \"versionType\": \"custom\"}, {\"status\": \"affected\", \"changes\": [{\"at\": \"20.3R1\", \"status\": \"affected\"}], \"version\": \"20.3\", \"lessThan\": \"20.3*\", \"versionType\": \"custom\"}, {\"status\": \"affected\", \"version\": \"20.4\", \"lessThan\": \"20.4R3-S6\", \"versionType\": \"custom\"}, {\"status\": \"affected\", \"version\": \"21.1\", \"lessThan\": \"21.1R3-S5\", \"versionType\": \"custom\"}, {\"status\": \"affected\", \"version\": \"21.2\", \"lessThan\": \"21.2R3-S4\", \"versionType\": \"custom\"}, {\"status\": \"affected\", \"version\": \"21.3\", \"lessThan\": \"21.3R3-S4\", \"versionType\": \"custom\"}, {\"status\": \"affected\", \"version\": \"21.4\", \"lessThan\": \"21.4R3-S3\", \"versionType\": \"custom\"}, {\"status\": \"affected\", \"version\": \"22.1\", \"lessThan\": \"22.1R3-S1\", \"versionType\": \"custom\"}, {\"status\": \"affected\", \"version\": \"22.2\", \"lessThan\": \"22.2R3\", \"versionType\": \"custom\"}, {\"status\": \"affected\", \"version\": \"22.3\", \"lessThan\": \"22.3R2\", \"versionType\": \"custom\"}, {\"status\": \"affected\", \"version\": \"22.4\", \"lessThan\": \"22.4R1-S1, 22.4R2\", \"versionType\": \"custom\"}], \"platforms\": [\"SRX Series\"], \"defaultStatus\": \"unaffected\"}], \"exploits\": [{\"lang\": \"en\", \"value\": \"Juniper SIRT is not aware of any malicious exploitation of this vulnerability.\\n\", \"supportingMedia\": [{\"type\": \"text/html\", \"value\": \"Juniper SIRT is not aware of any malicious exploitation of this vulnerability.\u003cbr\u003e\", \"base64\": false}]}], \"solutions\": [{\"lang\": \"en\", \"value\": \"The following software releases have been updated to resolve this specific issue: Junos OS 20.2R3-S7, 20.4R3-S6, 21.1R3-S5, 21.2R3-S4, 21.3R3-S4, 21.4R3-S3, 22.1R3-S1, 22.2R3, 22.3R2, 22.4R1-S1, 22.4R2, 23.1R1, and all subsequent releases.\\n\", \"supportingMedia\": [{\"type\": \"text/html\", \"value\": \"The following software releases have been updated to resolve this specific issue: Junos OS 20.2R3-S7, 20.4R3-S6, 21.1R3-S5, 21.2R3-S4, 21.3R3-S4, 21.4R3-S3, 22.1R3-S1, 22.2R3, 22.3R2, 22.4R1-S1, 22.4R2, 23.1R1, and all subsequent releases.\u003cbr\u003e\", \"base64\": false}]}], \"datePublic\": \"2022-07-12T16:00:00.000Z\", \"references\": [{\"url\": \"https://supportportal.juniper.net/JSA71645\"}], \"workarounds\": [{\"lang\": \"en\", \"value\": \"There are no available workarounds for this issue.\\n\", \"supportingMedia\": [{\"type\": \"text/html\", \"value\": \"There are no available workarounds for this issue.\u003cbr\u003e\", \"base64\": false}]}], \"x_generator\": {\"engine\": \"Vulnogram 0.1.0-dev\"}, \"descriptions\": [{\"lang\": \"en\", \"value\": \"An Out-of-bounds Read vulnerability in the flow processing daemon (flowd) of Juniper Networks Junos OS on SRX Series allows a local, authenticated attacker with low privileges, to cause a Denial of Service (DoS).\\n\\nIf a low privileged user executes a specific CLI command, flowd which is responsible for traffic forwarding in SRX crashes and generates a core dump. This will cause temporary traffic interruption until the flowd process is restarted automatically. Continued execution of this command will lead to a sustained DoS.\\n\\nThis issue affects Juniper Networks Junos OS on SRX Series:\\nAll versions prior to 20.2R3-S7;\\n20.3 version 20.3R1 and later versions;\\n20.4 versions prior to 20.4R3-S6;\\n21.1 versions prior to 21.1R3-S5;\\n21.2 versions prior to 21.2R3-S4;\\n21.3 versions prior to 21.3R3-S4;\\n21.4 versions prior to 21.4R3-S3;\\n22.1 versions prior to 22.1R3-S1;\\n22.2 versions prior to 22.2R3;\\n22.3 versions prior to 22.3R2;\\n22.4 versions prior to 22.4R1-S1, 22.4R2.\\n\", \"supportingMedia\": [{\"type\": \"text/html\", \"value\": \"An Out-of-bounds Read vulnerability in the flow processing daemon (flowd) of Juniper Networks Junos OS on SRX Series allows a local, authenticated attacker with low privileges, to cause a Denial of Service (DoS).\u003cbr\u003e\u003cbr\u003eIf a low privileged user executes a specific CLI command, flowd which is responsible for traffic forwarding in SRX crashes and generates a core dump. This will cause temporary traffic interruption until the flowd process is restarted automatically. Continued execution of this command will lead to a sustained DoS.\u003cbr\u003e\u003cbr\u003eThis issue affects Juniper Networks Junos OS on SRX Series:\u003cbr\u003eAll versions prior to 20.2R3-S7;\u003cbr\u003e20.3 version 20.3R1 and later versions;\u003cbr\u003e20.4 versions prior to 20.4R3-S6;\u003cbr\u003e21.1 versions prior to 21.1R3-S5;\u003cbr\u003e21.2 versions prior to 21.2R3-S4;\u003cbr\u003e21.3 versions prior to 21.3R3-S4;\u003cbr\u003e21.4 versions prior to 21.4R3-S3;\u003cbr\u003e22.1 versions prior to 22.1R3-S1;\u003cbr\u003e22.2 versions prior to 22.2R3;\u003cbr\u003e22.3 versions prior to 22.3R2;\u003cbr\u003e22.4 versions prior to 22.4R1-S1, 22.4R2.\u003cbr\u003e\", \"base64\": false}]}], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en\", \"type\": \"CWE\", \"cweId\": \"CWE-125\", \"description\": \"CWE-125 Out-of-bounds Read\"}]}, {\"descriptions\": [{\"lang\": \"en\", \"description\": \"Denial of Service (DoS)\"}]}], \"providerMetadata\": {\"orgId\": \"8cbe9d5a-a066-4c94-8978-4b15efeae968\", \"shortName\": \"juniper\", \"dateUpdated\": \"2023-07-14T16:26:24.554Z\"}}}",
"cveMetadata": "{\"cveId\": \"CVE-2023-36838\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2024-10-22T14:31:56.652Z\", \"dateReserved\": \"2023-06-27T16:17:25.276Z\", \"assignerOrgId\": \"8cbe9d5a-a066-4c94-8978-4b15efeae968\", \"datePublished\": \"2023-07-14T16:26:24.554Z\", \"assignerShortName\": \"juniper\"}",
"dataType": "CVE_RECORD",
"dataVersion": "5.1"
}
}
}
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Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base
model, served locally by ML-Gateway.
They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
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Related by attack behaviour
Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.
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