274 lines
14 KiB
JSON
274 lines
14 KiB
JSON
{
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"dataType": "CVE_RECORD",
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"dataVersion": "5.2",
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"cveMetadata": {
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"cveId": "CVE-2026-33780",
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"assignerOrgId": "8cbe9d5a-a066-4c94-8978-4b15efeae968",
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"state": "PUBLISHED",
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"assignerShortName": "juniper",
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"dateReserved": "2026-03-23T19:46:13.669Z",
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"datePublished": "2026-04-09T21:29:20.534Z",
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"dateUpdated": "2026-04-13T18:06:19.950Z"
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},
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"containers": {
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"cna": {
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"affected": [
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{
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"defaultStatus": "unaffected",
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"product": "Junos OS",
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"vendor": "Juniper Networks",
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"versions": [
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{
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"lessThan": "22.4R3-S5",
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"status": "affected",
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"version": "0",
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"versionType": "semver"
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},
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{
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"lessThan": "23.2R2-S3",
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"status": "affected",
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"version": "23.2",
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"versionType": "semver"
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},
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{
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"lessThan": "23.4R2-S4",
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"status": "affected",
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"version": "23.4",
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"versionType": "semver"
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},
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{
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"lessThan": "24.2R2",
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"status": "affected",
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"version": "24.2",
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"versionType": "semver"
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}
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]
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},
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{
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"defaultStatus": "unaffected",
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"product": "Junos OS Evolved",
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"vendor": "Juniper Networks",
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"versions": [
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{
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"lessThan": "22.4R3-S5-EVO",
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"status": "affected",
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"version": "all version prior to",
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"versionType": "semver"
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},
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{
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"lessThan": "23.2R2-S3-EVO",
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"status": "affected",
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"version": "23.2",
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"versionType": "semver"
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},
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{
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"lessThan": "23.4R2-S4-EVO",
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"status": "affected",
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"version": "23.4",
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"versionType": "semver"
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},
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{
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"lessThan": "24.2R2-EVO",
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"status": "affected",
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"version": "24.2",
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"versionType": "semver"
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}
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]
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}
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],
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"configurations": [
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{
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"lang": "en",
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"supportingMedia": [
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{
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"base64": false,
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"type": "text/html",
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"value": "<span style=\"background-color: rgb(251, 251, 251);\">To be exposed to this issue the device must be configured for EVPN-MPLS. Refer to product documentation for how to configure EVPN-MPLS as there are different configuration options.</span>\n\n<br>"
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}
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],
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"value": "To be exposed to this issue the device must be configured for EVPN-MPLS. Refer to product documentation for how to configure EVPN-MPLS as there are different configuration options."
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}
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],
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"datePublic": "2026-04-08T16:00:00.000Z",
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"descriptions": [
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{
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"lang": "en",
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"supportingMedia": [
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{
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"base64": false,
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"type": "text/html",
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"value": "A Missing Release of Memory after Effective Lifetime vulnerability in the Layer 2 Address Learning Daemon (l2ald) of Juniper Networks Junos OS and Junos OS Evolved allows an adjacent, unauthenticated attacker to cause a memory leak ultimately leading to a Denial of Service (DoS).<br><br>\n\nIn an EVPN-MPLS scenario, routes learned from remote multi-homed Provider Edge (PE) devices are programmed as ESI routes. Due to a logic issue in the l2ald memory management, memory allocated for these routes is not released when there is churn for these routes. As a result, memory leaks in the l2ald process which will ultimately lead to a crash and restart of l2ald.<br><br>Use the following command to monitor the memory consumption by l2ald:<br><br><tt>user@device> show system process extensive | match \"PID|l2ald\"</tt> \n\n<br><br><p>This issue affects:</p><p>Junos OS:</p><p></p><ul><li>all versions before 22.4R3-S5,</li><li>23.2 versions before 23.2R2-S3,</li><li>23.4 versions before 23.4R2-S4,</li><li>24.2 versions before 24.2R2;</li></ul><p></p><p>Junos OS Evolved:</p><p></p><ul><li>all versions before 22.4R3-S5-EVO,</li><li>23.2 versions before 23.2R2-S3-EVO,</li><li>23.4 versions before 23.4R2-S4-EVO,</li><li>24.2 versions before 24.2R2-EVO.</li></ul><p></p><p><br></p>"
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}
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],
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"value": "A Missing Release of Memory after Effective Lifetime vulnerability in the Layer 2 Address Learning Daemon (l2ald) of Juniper Networks Junos OS and Junos OS Evolved allows an adjacent, unauthenticated attacker to cause a memory leak ultimately leading to a Denial of Service (DoS).\n\n\n\nIn an EVPN-MPLS scenario, routes learned from remote multi-homed Provider Edge (PE) devices are programmed as ESI routes. Due to a logic issue in the l2ald memory management, memory allocated for these routes is not released when there is churn for these routes. As a result, memory leaks in the l2ald process which will ultimately lead to a crash and restart of l2ald.\n\nUse the following command to monitor the memory consumption by l2ald:\n\nuser@device> show system process extensive | match \"PID|l2ald\" \n\n\n\nThis issue affects:\n\nJunos OS:\n\n\n\n * all versions before 22.4R3-S5,\n * 23.2 versions before 23.2R2-S3,\n * 23.4 versions before 23.4R2-S4,\n * 24.2 versions before 24.2R2;\n\n\n\n\nJunos OS Evolved:\n\n\n\n * all versions before 22.4R3-S5-EVO,\n * 23.2 versions before 23.2R2-S3-EVO,\n * 23.4 versions before 23.4R2-S4-EVO,\n * 24.2 versions before 24.2R2-EVO."
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}
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],
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"exploits": [
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{
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"lang": "en",
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"supportingMedia": [
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{
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"base64": false,
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"type": "text/html",
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"value": "Juniper SIRT is not aware of any malicious exploitation of this vulnerability."
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}
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],
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"value": "Juniper SIRT is not aware of any malicious exploitation of this vulnerability."
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}
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],
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"metrics": [
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{
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"cvssV3_1": {
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"attackComplexity": "LOW",
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"attackVector": "ADJACENT_NETWORK",
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"availabilityImpact": "HIGH",
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"baseScore": 6.5,
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"baseSeverity": "MEDIUM",
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"confidentialityImpact": "NONE",
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"integrityImpact": "NONE",
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"privilegesRequired": "NONE",
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"scope": "UNCHANGED",
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"userInteraction": "NONE",
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"vectorString": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
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"version": "3.1"
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},
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"format": "CVSS",
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"scenarios": [
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{
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"lang": "en",
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"value": "GENERAL"
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}
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]
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},
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{
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"cvssV4_0": {
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"Automatable": "YES",
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"Recovery": "NOT_DEFINED",
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"Safety": "NOT_DEFINED",
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"attackComplexity": "LOW",
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"attackRequirements": "NONE",
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"attackVector": "ADJACENT",
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"baseScore": 7.1,
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"baseSeverity": "HIGH",
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"privilegesRequired": "NONE",
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"providerUrgency": "NOT_DEFINED",
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"subAvailabilityImpact": "LOW",
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"subConfidentialityImpact": "NONE",
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"subIntegrityImpact": "NONE",
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"userInteraction": "NONE",
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"valueDensity": "NOT_DEFINED",
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"vectorString": "CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:L/AU:Y/RE:M",
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"version": "4.0",
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"vulnAvailabilityImpact": "HIGH",
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"vulnConfidentialityImpact": "NONE",
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"vulnIntegrityImpact": "NONE",
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"vulnerabilityResponseEffort": "MODERATE"
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},
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"format": "CVSS",
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"scenarios": [
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{
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"lang": "en",
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"value": "GENERAL"
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}
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]
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}
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],
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"problemTypes": [
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{
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"descriptions": [
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{
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"cweId": "CWE-401",
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"description": "CWE-401 Missing Release of Memory after Effective Lifetime",
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"lang": "en",
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"type": "CWE"
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}
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]
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}
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],
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"providerMetadata": {
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"orgId": "8cbe9d5a-a066-4c94-8978-4b15efeae968",
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"shortName": "juniper",
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"dateUpdated": "2026-04-09T21:29:20.534Z"
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},
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"references": [
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{
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"tags": [
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"vendor-advisory"
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],
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"url": "https://kb.juniper.net/JSA107819"
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}
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],
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"solutions": [
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{
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"lang": "en",
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"supportingMedia": [
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{
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"base64": false,
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"type": "text/html",
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"value": "The following software releases have been updated to resolve this specific issue: <br>Junos OS Evolved: 22.4R3-S5-EVO, 23.2R2-S3-EVO, 23.4R2-S4-EVO, 24.2R2-EVO, 24.4R1-EVO, and all subsequent releases;<br>Junos OS: 22.4R3-S5, 23.2R2-S3, 23.4R2-S4, 24.2R2, 24.4R1, and all subsequent releases."
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}
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],
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"value": "The following software releases have been updated to resolve this specific issue: \nJunos OS Evolved: 22.4R3-S5-EVO, 23.2R2-S3-EVO, 23.4R2-S4-EVO, 24.2R2-EVO, 24.4R1-EVO, and all subsequent releases;\nJunos OS: 22.4R3-S5, 23.2R2-S3, 23.4R2-S4, 24.2R2, 24.4R1, and all subsequent releases."
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}
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],
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"source": {
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"advisory": "JSA107819",
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"defect": [
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"1824956"
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],
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"discovery": "USER"
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},
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"title": "Junos OS and Junos OS Evolved: In an EVPN-MPLS scenario churn of ESI routes causes a memory leak in l2ald",
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"workarounds": [
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{
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"lang": "en",
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"supportingMedia": [
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{
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"base64": false,
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"type": "text/html",
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"value": "There are no known workarounds for this issue."
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}
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],
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"value": "There are no known workarounds for this issue."
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}
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],
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"x_generator": {
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"engine": "Vulnogram 0.1.0-dev"
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}
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},
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"adp": [
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{
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"metrics": [
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{
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"other": {
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"type": "ssvc",
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"content": {
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"id": "CVE-2026-33780",
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"role": "CISA Coordinator",
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"options": [
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{
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"Exploitation": "none"
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},
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{
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"Automatable": "no"
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},
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{
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"Technical Impact": "partial"
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}
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],
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"version": "2.0.3",
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"timestamp": "2026-04-13T17:39:43.706961Z"
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}
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}
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}
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],
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"title": "CISA ADP Vulnrichment",
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"providerMetadata": {
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"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
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"shortName": "CISA-ADP",
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"dateUpdated": "2026-04-13T18:06:19.950Z"
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}
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}
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]
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}
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} |