CVE-2022-22215

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It is possible that after the termination of a gRPC connection the respective/var/run/<pid>.env file is not getting deleted which if occurring repeatedly can cause inode exhaustion. Inode exhaustion can present itself in two different ways: 1. The following log message can be observed: host kernel: pid <pid> (<process>), uid <uid> inumber <number> on /.mount/var: out of inodes which by itself is a clear indication. 2. The following log message can be observed: host <process>[<pid>]: ... : No space left on device which is not deterministic and just a representation of a write error which could have several reasons. So the following check needs to be done: user@host> show system storage no-forwarding Filesystem Size Used Avail Capacity Mounted on /dev/ada1p1 475M 300M 137M 69% /.mount/var which indicates that the write error is not actually due to a lack of disk space. If either 1. or 2. has been confirmed, then the output of: user@host> file list /var/run/*.env | count need to be checked and if it indicates a high (>10000) number of files the system has been affected by this issue. This issue affects: Juniper Networks Junos OS All versions prior to 19.1R3-S8; 19.2 versions prior to 19.2R3-S6; 19.3 versions prior to 19.3R3-S5; 19.4 versions prior to 19.4R2-S6, 19.4R3-S7; 20.1 version 20.1R1 and later versions; 20.2 versions prior to 20.2R3-S5; 20.3 versions prior to 20.3R3-S4; 20.4 versions prior to 20.4R3; 21.1 versions prior to 21.1R3; 21.2 versions prior to 21.2R2. Juniper Networks Junos OS Evolved All versions prior to 20.4R3-EVO; 21.1 versions prior to 21.1R3-S1-EVO; 21.2 versions prior to 21.2R1-S1-EVO, 21.2R2-EVO."}], "exploits": [{"lang": "en", "value": "Juniper SIRT is not aware of any malicious exploitation of this vulnerability."}], "metrics": [{"cvssV3_1": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 6.5, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "version": "3.1"}}], "problemTypes": [{"descriptions": [{"description": "775", "lang": "en", "type": "text"}]}, {"descriptions": [{"description": "Denial of Service (DoS)", "lang": "en", "type": "text"}]}], "providerMetadata": {"dateUpdated": "2022-07-20T14:15:37.000Z", "orgId": "8cbe9d5a-a066-4c94-8978-4b15efeae968", "shortName": "juniper"}, "references": [{"tags": ["x_refsource_CONFIRM"], "url": "https://kb.juniper.net/JSA69719"}], "solutions": [{"lang": "en", "value": "The following software releases have been updated to resolve this specific issue: \nJunos OS: 19.1R3-S8, 19.2R3-S6, 19.3R3-S5, 19.4R2-S6, 19.4R3-S7, 20.2R3-S5, 20.3R3-S4, 20.4R3, 21.1R3, 21.2R2, 21.3R1, and all subsequent releases;\nJunos OS Evolved: 20.4R3-EVO, 21.1R3-S1-EVO, 21.2R1-S1-EVO, 21.2R2-EVO, 21.3R1-EVO, and all subsequent releases."}], "source": {"advisory": "JSA69719", "defect": ["1604157"], "discovery": "USER"}, "title": "Junos OS and Junos OS Evolved: /var/run/<pid>.env files are potentially not deleted during termination of a gRPC connection causing inode exhaustion", "workarounds": [{"lang": "en", "value": "There are no viable workarounds for this issue.\nTo reduce the risk of exploitation use access lists or firewall filters to the device only from trusted, administrative networks or hosts."}], "x_generator": {"engine": "Vulnogram 0.0.9"}, "x_legacyV4Record": {"CVE_data_meta": {"ASSIGNER": "sirt@juniper.net", "DATE_PUBLIC": "2022-07-13T16:00:00.000Z", "ID": "CVE-2022-22215", "STATE": "PUBLIC", "TITLE": "Junos OS and Junos OS Evolved: /var/run/<pid>.env files are potentially not deleted during termination of a gRPC connection causing inode exhaustion"}, "affects": {"vendor": {"vendor_data": [{"product": {"product_data": [{"product_name": "Junos OS", "version": {"version_data": [{"version_affected": "<", "version_value": "19.1R3-S8"}, {"version_affected": "<", "version_name": "19.2", "version_value": "19.2R3-S6"}, {"version_affected": "<", "version_name": "19.3", "version_value": "19.3R3-S5"}, {"version_affected": "<", "version_name": "19.4", "version_value": "19.4R2-S6, 19.4R3-S7"}, {"version_affected": ">=", "version_name": "20.1", "version_value": "20.1R1"}, {"version_affected": "<", "version_name": "20.2", "version_value": "20.2R3-S5"}, {"version_affected": "<", "version_name": "20.3", "version_value": "20.3R3-S4"}, {"version_affected": "<", "version_name": "20.4", "version_value": "20.4R3"}, {"version_affected": "<", "version_name": "21.1", "version_value": "21.1R3"}, {"version_affected": "<", "version_name": "21.2", "version_value": "21.2R2"}]}}, {"product_name": "Junos OS Evolved", "version": {"version_data": [{"version_affected": "<", "version_value": "20.4R3-EVO"}, {"version_affected": "<", "version_name": "21.1", "version_value": "21.1R3-S1-EVO"}, {"version_affected": "<", "version_name": "21.2", "version_value": "21.2R1-S1-EVO, 21.2R2-EVO"}]}}]}, "vendor_name": "Juniper Networks"}]}}, "configuration": [{"lang": "en", "value": "To be affected by this issue the system needs to be configured for gRPC:\n\n [ system services extension-service request-response grpc ]"}], "data_format": "MITRE", "data_type": "CVE", "data_version": "4.0", "description": {"description_data": [{"lang": "eng", "value": "A Missing Release of File Descriptor or Handle after Effective Lifetime vulnerability in plugable authentication module (PAM) of Juniper Networks Junos OS and Junos OS Evolved allows a locally authenticated attacker with low privileges to cause a Denial of Service (DoS). It is possible that after the termination of a gRPC connection the respective/var/run/<pid>.env file is not getting deleted which if occurring repeatedly can cause inode exhaustion. Inode exhaustion can present itself in two different ways: 1. The following log message can be observed: host kernel: pid <pid> (<process>), uid <uid> inumber <number> on /.mount/var: out of inodes which by itself is a clear indication. 2. The following log message can be observed: host <process>[<pid>]: ... : No space left on device which is not deterministic and just a representation of a write error which could have several reasons. So the following check needs to be done: user@host> show system storage no-forwarding Filesystem Size Used Avail Capacity Mounted on /dev/ada1p1 475M 300M 137M 69% /.mount/var which indicates that the write error is not actually due to a lack of disk space. If either 1. or 2. has been confirmed, then the output of: user@host> file list /var/run/*.env | count need to be checked and if it indicates a high (>10000) number of files the system has been affected by this issue. This issue affects: Juniper Networks Junos OS All versions prior to 19.1R3-S8; 19.2 versions prior to 19.2R3-S6; 19.3 versions prior to 19.3R3-S5; 19.4 versions prior to 19.4R2-S6, 19.4R3-S7; 20.1 version 20.1R1 and later versions; 20.2 versions prior to 20.2R3-S5; 20.3 versions prior to 20.3R3-S4; 20.4 versions prior to 20.4R3; 21.1 versions prior to 21.1R3; 21.2 versions prior to 21.2R2. 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It is possible that after the termination of a gRPC connection the respective/var/run/<pid>.env file is not getting deleted which if occurring repeatedly can cause inode exhaustion. Inode exhaustion can present itself in two different ways: 1. The following log message can be observed: host kernel: pid <pid> (<process>), uid <uid> inumber <number> on /.mount/var: out of inodes which by itself is a clear indication. 2. The following log message can be observed: host <process>[<pid>]: ... : No space left on device which is not deterministic and just a representation of a write error which could have several reasons. So the following check needs to be done: user@host> show system storage no-forwarding Filesystem Size Used Avail Capacity Mounted on /dev/ada1p1 475M 300M 137M 69% /.mount/var which indicates that the write error is not actually due to a lack of disk space. If either 1. or 2. has been confirmed, then the output of: user@host> file list /var/run/*.env | count need to be checked and if it indicates a high (>10000) number of files the system has been affected by this issue. This issue affects: Juniper Networks Junos OS All versions prior to 19.1R3-S8; 19.2 versions prior to 19.2R3-S6; 19.3 versions prior to 19.3R3-S5; 19.4 versions prior to 19.4R2-S6, 19.4R3-S7; 20.1 version 20.1R1 and later versions; 20.2 versions prior to 20.2R3-S5; 20.3 versions prior to 20.3R3-S4; 20.4 versions prior to 20.4R3; 21.1 versions prior to 21.1R3; 21.2 versions prior to 21.2R2. Juniper Networks Junos OS Evolved All versions prior to 20.4R3-EVO; 21.1 versions prior to 21.1R3-S1-EVO; 21.2 versions prior to 21.2R1-S1-EVO, 21.2R2-EVO."}, {"lang": "es", "value": "Una vulnerabilidad de falta de liberaci\u00f3n del Descriptor de Archivo o del Manejador despu\u00e9s del Tiempo de Vida Efectivo en el M\u00f3dulo de Autenticaci\u00f3n Conectable (PAM) de Junos OS y Junos OS Evolved de Juniper Networks permite a un atacante autenticado localmente con privilegios bajos causar una Denegaci\u00f3n de Servicio (DoS). Es posible que tras la finalizaci\u00f3n de una conexi\u00f3n gRPC no se elimine el archivo respectivo/var/run/(pid).env, lo cual, si ocurre repetidamente, puede causar el agotamiento del inodo. El agotamiento del inodo puede presentarse de dos maneras diferentes: 1. Puede observarse el siguiente mensaje de registro: host kernel: pid (pid) ((proceso)), uid (uid) inumber (number) on /.mount/var: out of inodes que por s\u00ed mismo es una clara indicaci\u00f3n. 2. Puede observarse el siguiente mensaje de registro: host (proceso)[(pid)]: ... : No queda espacio en el dispositivo, lo cual no es determinista y s\u00f3lo es una representaci\u00f3n de un error de escritura que podr\u00eda tener varias razones. As\u00ed que debe hacerse la siguiente comprobaci\u00f3n: user@host) show system storage no-forwarding Filesystem Size Used Avail Capacity Mounted on /dev/ada1p1 475M 300M 137M 69% /.mount/var que indica que el error de escritura no es debido realmente a una falta de espacio en disco. Si ha sido confirmado 1. o 2., entonces es debido comprobar la salida de: user@host) file list /var/run/*.env | count y si indica un n\u00famero elevado ()10000) de archivos el sistema ha sido afectado por este problema. Este problema afecta a: Juniper Networks Junos OS Todas las versiones anteriores a 19.1R3-S8; 19.2 versiones anteriores a 19.2R3-S6; 19.3 versiones anteriores a 19.3R3-S5; 19.4 versiones anteriores a 19.4R2-S6, 19.4R3-S7; 20.1 versi\u00f3n 20. 1R1 y posteriores; 20.2 versiones anteriores a 20.2R3-S5; 20.3 versiones anteriores a 20.3R3-S4; 20.4 versiones anteriores a 20.4R3; 21.1 versiones anteriores a 21.1R3; 21.2 versiones anteriores a 21.2R2. Juniper Networks Junos OS Evolved Todas las versiones anteriores a 20.4R3-EVO; 21.1 versiones anteriores a 21.1R3-S1-EVO; 21.2 versiones anteriores a 21.2R1-S1-EVO, 21.2R2-EVO"}], "id": "CVE-2022-22215", "lastModified": "2026-06-17T04:28:01.490", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 6.5, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 2.8, "impactScore": 3.6, "source": "sirt@juniper.net", "type": "Secondary"}, {"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 5.5, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 3.6, "source": "nvd@nist.gov", "type": "Primary"}]}, "published": "2022-07-20T15:15:08.950", "references": [{"source": "sirt@juniper.net", "tags": ["Exploit", "Vendor Advisory"], "url": "https://kb.juniper.net/JSA69719"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Exploit", "Vendor Advisory"], "url": "https://kb.juniper.net/JSA69719"}], "sourceIdentifier": "sirt@juniper.net", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-772"}], "source": "nvd@nist.gov", "type": "Primary"}]}

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