CVE-2021-31352

{"containers": {"cna": {"affected": [{"product": "SRC Series", "vendor": "Juniper Networks", "versions": [{"lessThan": "4.13.0-R6", "status": "affected", "version": "unspecified", "versionType": "custom"}]}], "configurations": [{"lang": "en", "value": "A sample configuration of NETCONF over SSH is shown below:\n\n netconf {\n ssh {\n port 830;\n }\n }"}], "datePublic": "2021-10-13T00:00:00.000Z", "descriptions": [{"lang": "en", "value": "An Information Exposure vulnerability in Juniper Networks SRC Series devices configured for NETCONF over SSH permits the negotiation of weak ciphers, which could allow a remote attacker to obtain sensitive information. A remote attacker with read and write access to network data could exploit this vulnerability to display plaintext bits from a block of ciphertext and obtain sensitive information. This issue affects all Juniper Networks SRC Series versions prior to 4.13.0-R6."}], "exploits": [{"lang": "en", "value": "Juniper SIRT is not aware of any malicious exploitation of this vulnerability."}], "metrics": [{"cvssV3_1": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 5.3, "baseSeverity": "MEDIUM", "confidentialityImpact": "LOW", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N", "version": "3.1"}}], "problemTypes": [{"descriptions": [{"cweId": "CWE-200", "description": "CWE-200 Information Exposure", "lang": "en", "type": "CWE"}]}], "providerMetadata": {"dateUpdated": "2021-10-19T18:16:33.000Z", "orgId": "8cbe9d5a-a066-4c94-8978-4b15efeae968", "shortName": "juniper"}, "references": [{"tags": ["x_refsource_CONFIRM"], "url": "https://kb.juniper.net/JSA11217"}], "solutions": [{"lang": "en", "value": "A hotfix has been created to resolve this issue. Contact Juniper Networks Technical Support to request the hotfix.\n\nWeak ciphers are now disabled by default. Only the following ciphers and key-exchange (KEX) algorithms are now enabled by default:\n\n\u2022 Ciphers: chacha20-poly1305@openssh.com,aes128-ctr,aes192-ctr,aes256-ctr,aes128-gcm@openssh.com,aes256-gcm@openssh.com\n\u2022 KEX Algorithms: curve25519-sha256,curve25519-sha256@libssh.org,ecdh-sha2-nistp256,ecdh-sha2-nistp384,ecdh-sha2-nistp521,diffie-hellman-group-exchange-sha256,diffie-hellman-group16-sha512,diffie-hellman-group18-sha512,diffie-hellman-group14-sha256,diffie-hellman-group14-sha1\n\nNote: After upgrading to a fixed release, any manually configured weak ciphers or KEX algorithms for NETCONF will be retained. Administrators should reset their cipher configuration by typing:\n root@src# delete system services netconf ssh\n root@src# commit\n Stopping NETCONF/SSH:\n commit complete.\n\n root@src# set system services netconf ssh"}], "source": {"advisory": "JSA11217", "defect": ["1568322"], "discovery": "INTERNAL"}, "title": "SRC Series: NETCONF over SSH allows negotiation of weak ciphers", "workarounds": [{"lang": "en", "value": "There are no viable workarounds for this issue."}], "x_generator": {"engine": "Vulnogram 0.0.9"}, "x_legacyV4Record": {"CVE_data_meta": {"ASSIGNER": "sirt@juniper.net", "DATE_PUBLIC": "2021-10-13T16:00:00.000Z", "ID": "CVE-2021-31352", "STATE": "PUBLIC", "TITLE": "SRC Series: NETCONF over SSH allows negotiation of weak ciphers"}, "affects": {"vendor": {"vendor_data": [{"product": {"product_data": [{"product_name": "SRC Series", "version": {"version_data": [{"version_affected": "<", "version_value": "4.13.0-R6"}]}}]}, "vendor_name": "Juniper Networks"}]}}, "configuration": [{"lang": "en", "value": "A sample configuration of NETCONF over SSH is shown below:\n\n netconf {\n ssh {\n port 830;\n }\n }"}], "data_format": "MITRE", "data_type": "CVE", "data_version": "4.0", "description": {"description_data": [{"lang": "eng", "value": "An Information Exposure vulnerability in Juniper Networks SRC Series devices configured for NETCONF over SSH permits the negotiation of weak ciphers, which could allow a remote attacker to obtain sensitive information. A remote attacker with read and write access to network data could exploit this vulnerability to display plaintext bits from a block of ciphertext and obtain sensitive information. This issue affects all Juniper Networks SRC Series versions prior to 4.13.0-R6."}]}, "exploit": [{"lang": "en", "value": "Juniper SIRT is not aware of any malicious exploitation of this vulnerability."}], "generator": {"engine": "Vulnogram 0.0.9"}, "impact": {"cvss": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 5.3, "baseSeverity": "MEDIUM", "confidentialityImpact": "LOW", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N", "version": "3.1"}}, "problemtype": {"problemtype_data": [{"description": [{"lang": "eng", "value": "CWE-200 Information Exposure"}]}]}, "references": {"reference_data": [{"name": "https://kb.juniper.net/JSA11217", "refsource": "CONFIRM", "url": "https://kb.juniper.net/JSA11217"}]}, "solution": [{"lang": "en", "value": "A hotfix has been created to resolve this issue. Contact Juniper Networks Technical Support to request the hotfix.\n\nWeak ciphers are now disabled by default. Only the following ciphers and key-exchange (KEX) algorithms are now enabled by default:\n\n\u2022 Ciphers: chacha20-poly1305@openssh.com,aes128-ctr,aes192-ctr,aes256-ctr,aes128-gcm@openssh.com,aes256-gcm@openssh.com\n\u2022 KEX Algorithms: curve25519-sha256,curve25519-sha256@libssh.org,ecdh-sha2-nistp256,ecdh-sha2-nistp384,ecdh-sha2-nistp521,diffie-hellman-group-exchange-sha256,diffie-hellman-group16-sha512,diffie-hellman-group18-sha512,diffie-hellman-group14-sha256,diffie-hellman-group14-sha1\n\nNote: After upgrading to a fixed release, any manually configured weak ciphers or KEX algorithms for NETCONF will be retained. Administrators should reset their cipher configuration by typing:\n root@src# delete system services netconf ssh\n root@src# commit\n Stopping NETCONF/SSH:\n commit complete.\n\n root@src# set system services netconf ssh"}], "source": {"advisory": "JSA11217", "defect": ["1568322"], "discovery": "INTERNAL"}, "work_around": [{"lang": "en", "value": "There are no viable workarounds for this issue."}]}}, "adp": [{"providerMetadata": {"orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2024-08-03T22:55:53.552Z"}, "title": "CVE Program Container", "references": [{"tags": ["x_refsource_CONFIRM", "x_transferred"], "url": "https://kb.juniper.net/JSA11217"}]}]}, "cveMetadata": {"assignerOrgId": "8cbe9d5a-a066-4c94-8978-4b15efeae968", "assignerShortName": "juniper", "cveId": "CVE-2021-31352", "datePublished": "2021-10-19T18:16:33.308Z", "dateReserved": "2021-04-15T00:00:00.000Z", "dateUpdated": "2024-09-16T19:20:18.621Z", "state": "PUBLISHED"}, "dataType": "CVE_RECORD", "dataVersion": "5.1"}

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{"affected": [{"affectedData": [{"product": "SRC Series", "vendor": "Juniper Networks", "versions": [{"lessThan": "4.13.0-R6", "status": "affected", "version": "unspecified", "versionType": "custom"}]}], "source": "sirt@juniper.net"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:a:juniper:session_and_resource_control:*:*:*:*:*:*:*:*", "matchCriteriaId": "F859871E-2194-4F8D-8978-26A032CF77D1", "versionEndExcluding": "4.130r6", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "An Information Exposure vulnerability in Juniper Networks SRC Series devices configured for NETCONF over SSH permits the negotiation of weak ciphers, which could allow a remote attacker to obtain sensitive information. A remote attacker with read and write access to network data could exploit this vulnerability to display plaintext bits from a block of ciphertext and obtain sensitive information. This issue affects all Juniper Networks SRC Series versions prior to 4.13.0-R6."}, {"lang": "es", "value": "Una vulnerabilidad de exposici\u00f3n de informaci\u00f3n en los dispositivos de Juniper Networks SRC Series configurados para NETCONF sobre SSH permite una negociaci\u00f3n de cifrados d\u00e9biles, lo que podr\u00eda permitir a un atacante remoto conseguir informaci\u00f3n confidencial. Un atacante remoto con acceso de lectura y escritura a los datos de la red podr\u00eda aprovechar esta vulnerabilidad para mostrar bits de texto plano de un bloque de texto cifrado y conseguir informaci\u00f3n confidencial. Este problema afecta a todas las versiones de Juniper Networks SRC Series anteriores a 4.13.0-R6"}], "id": "CVE-2021-31352", "lastModified": "2026-06-17T03:51:36.140", "metrics": {"cvssMetricV2": [{"acInsufInfo": false, "baseSeverity": "MEDIUM", "cvssData": {"accessComplexity": "LOW", "accessVector": "NETWORK", "authentication": "NONE", "availabilityImpact": "NONE", "baseScore": 5.0, "confidentialityImpact": "PARTIAL", "integrityImpact": "NONE", "vectorString": "AV:N/AC:L/Au:N/C:P/I:N/A:N", "version": "2.0"}, "exploitabilityScore": 10.0, "impactScore": 2.9, "obtainAllPrivilege": false, "obtainOtherPrivilege": false, "obtainUserPrivilege": false, "source": "nvd@nist.gov", "type": "Primary", "userInteractionRequired": false}], "cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 5.3, "baseSeverity": "MEDIUM", "confidentialityImpact": "LOW", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 1.4, "source": "sirt@juniper.net", "type": "Secondary"}]}, "published": "2021-10-19T19:15:08.660", "references": [{"source": "sirt@juniper.net", "tags": ["Exploit", "Patch", "Vendor Advisory"], "url": "https://kb.juniper.net/JSA11217"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Exploit", "Patch", "Vendor Advisory"], "url": "https://kb.juniper.net/JSA11217"}], "sourceIdentifier": "sirt@juniper.net", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-200"}], "source": "sirt@juniper.net", "type": "Secondary"}, {"description": [{"lang": "en", "value": "CWE-327"}], "source": "nvd@nist.gov", "type": "Primary"}]}

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