{"dataType":"CVE_RECORD","dataVersion":"5.1","cveMetadata":{"cveId":"CVE-2024-21603","assignerOrgId":"8cbe9d5a-a066-4c94-8978-4b15efeae968","state":"PUBLISHED","assignerShortName":"juniper","dateReserved":"2023-12-27T19:38:25.707Z","datePublished":"2024-01-12T00:54:22.697Z","dateUpdated":"2025-06-17T21:09:19.638Z"},"containers":{"cna":{"affected":[{"defaultStatus":"unaffected","platforms":["MX Series"],"product":"Junos OS","vendor":"Juniper Networks","versions":[{"lessThan":"20.4R3-S9","status":"affected","version":"0","versionType":"semver"},{"lessThan":"21.2R3-S6","status":"affected","version":"21.2","versionType":"semver"},{"lessThan":"21.3R3-S5","status":"affected","version":"21.3","versionType":"semver"},{"lessThan":"21.4R3","status":"affected","version":"21.4","versionType":"semver"},{"lessThan":"22.1R3","status":"affected","version":"22.1","versionType":"semver"},{"lessThan":"22.2R2","status":"affected","version":"22.2","versionType":"semver"},{"lessThan":"22.3R2","status":"affected","version":"22.3","versionType":"semver"}]}],"configurations":[{"lang":"en","supportingMedia":[{"base64":false,"type":"text/html","value":"<p>To be exposed to this issue a scaled SCU/DCU configuration with more than 10 classes needs to be present on the device:</p><code>  [ policy-options policy-statement &lt;policy name&gt; term &lt;term name&gt; then source-class/destination-class &lt;scu/dcu-class name1&gt; ]</code><br/><code>  ...</code><br/><code>  [ policy-options policy-statement &lt;policy name&gt; term &lt;term name&gt; then source-class/destination-class &lt;scu/dcu-class name11&gt; ]</code><br/><code>  [ interface &lt;interface&gt; unit &lt;unit#&gt; family &lt;family&gt; accounting source-class-usage/destination-class-usage input/output ]</code><br/>"}],"value":"To be exposed to this issue a scaled SCU/DCU configuration with more than 10 classes needs to be present on the device:\n\n  [ policy-options policy-statement <policy name> term <term name> then source-class/destination-class <scu/dcu-class name1> ]\n  ...\n  [ policy-options policy-statement <policy name> term <term name> then source-class/destination-class <scu/dcu-class name11> ]\n  [ interface <interface> unit <unit#> family <family> accounting source-class-usage/destination-class-usage input/output ]\n"}],"datePublic":"2024-01-10T17:00:00.000Z","descriptions":[{"lang":"en","supportingMedia":[{"base64":false,"type":"text/html","value":"\n\n<p>An Improper Check for Unusual or Exceptional Conditions vulnerability in the kernel of Juniper Network Junos OS on MX Series allows a network based attacker with low privileges to cause a denial of service.</p><p>If a scaled configuration for Source class usage (SCU) / destination class usage (DCU) (more than 10 route classes) is present and the SCU/DCU statistics are gathered by executing specific SNMP requests or CLI commands, a 'vmcore' for the RE kernel will be seen which leads to a device restart. Continued exploitation of this issue will lead to a sustained DoS.</p><p>This issue only affects MX Series devices with MPC10, MPC11 or LC9600, and MX304. No other MX Series devices are affected.</p><p>This issue affects Juniper Networks Junos OS:</p><p></p><ul><li>All versions earlier than 20.4R3-S9;</li><li>21.2 versions earlier than 21.2R3-S6;</li><li>21.3 versions earlier than 21.3R3-S5;</li><li>21.4 versions earlier than 21.4R3;</li><li>22.1 versions earlier than 22.1R3;</li><li>22.2 versions earlier than 22.2R2;</li><li>22.3 versions earlier than 22.3R2.</li></ul><p></p>\n\n"}],"value":"\nAn Improper Check for Unusual or Exceptional Conditions vulnerability in the kernel of Juniper Network Junos OS on MX Series allows a network based attacker with low privileges to cause a denial of service.\n\nIf a scaled configuration for Source class usage (SCU) / destination class usage (DCU) (more than 10 route classes) is present and the SCU/DCU statistics are gathered by executing specific SNMP requests or CLI commands, a 'vmcore' for the RE kernel will be seen which leads to a device restart. Continued exploitation of this issue will lead to a sustained DoS.\n\nThis issue only affects MX Series devices with MPC10, MPC11 or LC9600, and MX304. No other MX Series devices are affected.\n\nThis issue affects Juniper Networks Junos OS:\n\n\n\n  *  All versions earlier than 20.4R3-S9;\n  *  21.2 versions earlier than 21.2R3-S6;\n  *  21.3 versions earlier than 21.3R3-S5;\n  *  21.4 versions earlier than 21.4R3;\n  *  22.1 versions earlier than 22.1R3;\n  *  22.2 versions earlier than 22.2R2;\n  *  22.3 versions earlier than 22.3R2.\n\n\n\n\n\n\n"}],"exploits":[{"lang":"en","supportingMedia":[{"base64":false,"type":"text/html","value":"<p>Juniper SIRT is not aware of any malicious exploitation of this vulnerability.</p>"}],"value":"Juniper SIRT is not aware of any malicious exploitation of this vulnerability.\n\n"}],"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"},"format":"CVSS","scenarios":[{"lang":"en","value":"GENERAL"}]}],"problemTypes":[{"descriptions":[{"cweId":"CWE-754","description":"CWE-754 Improper Check for Unusual or Exceptional Conditions","lang":"en","type":"CWE"}]},{"descriptions":[{"description":"Denial of Service (DoS)","lang":"en"}]}],"providerMetadata":{"orgId":"8cbe9d5a-a066-4c94-8978-4b15efeae968","shortName":"juniper","dateUpdated":"2024-01-12T00:54:22.697Z"},"references":[{"tags":["vendor-advisory"],"url":"https://supportportal.juniper.net/JSA75744"},{"tags":["technical-description"],"url":"https://www.first.org/cvss/calculator/4.0#CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:L"}],"solutions":[{"lang":"en","supportingMedia":[{"base64":false,"type":"text/html","value":"<p>The following software releases have been updated to resolve this specific issue: Junos OS 20.4R3-S9, 21.2R3-S6, 21.3R3-S5, 21.4R3, 22.1R3, 22.2R2, 22.3R2, 22.4R1, and all subsequent releases.</p>"}],"value":"The following software releases have been updated to resolve this specific issue: Junos OS 20.4R3-S9, 21.2R3-S6, 21.3R3-S5, 21.4R3, 22.1R3, 22.2R2, 22.3R2, 22.4R1, and all subsequent releases.\n\n"}],"source":{"advisory":"JSA75744","defect":["1670797"],"discovery":"USER"},"timeline":[{"lang":"en","time":"2024-01-10T17:00:00.000Z","value":"Initial Publication"}],"title":"Junos OS: MX Series: Gathering statistics in a scaled SCU/DCU configuration will lead to a device crash","workarounds":[{"lang":"en","supportingMedia":[{"base64":false,"type":"text/html","value":"<p>There are no known workarounds for this issue.</p>"}],"value":"There are no known workarounds for this issue.\n\n"}],"x_generator":{"engine":"Vulnogram 0.1.0-av217"}},"adp":[{"providerMetadata":{"orgId":"af854a3a-2127-422b-91ae-364da2661108","shortName":"CVE","dateUpdated":"2024-08-01T22:27:35.683Z"},"title":"CVE Program Container","references":[{"tags":["vendor-advisory","x_transferred"],"url":"https://supportportal.juniper.net/JSA75744"},{"tags":["technical-description","x_transferred"],"url":"https://www.first.org/cvss/calculator/4.0#CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:L"}]},{"metrics":[{"other":{"type":"ssvc","content":{"id":"CVE-2024-21603","role":"CISA Coordinator","options":[{"Exploitation":"none"},{"Automatable":"yes"},{"Technical Impact":"partial"}],"version":"2.0.3","timestamp":"2024-01-12T15:45:49.593327Z"}}}],"title":"CISA ADP Vulnrichment","providerMetadata":{"orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","shortName":"CISA-ADP","dateUpdated":"2025-06-17T21:09:19.638Z"}}]}}