231 lines
13 KiB
JSON
231 lines
13 KiB
JSON
{
|
||
"dataType": "CVE_RECORD",
|
||
"dataVersion": "5.2",
|
||
"cveMetadata": {
|
||
"cveId": "CVE-2026-73459",
|
||
"assignerOrgId": "c8b34d1a-69ae-45c3-88fe-f3b3d44f39b7",
|
||
"state": "PUBLISHED",
|
||
"assignerShortName": "Arista",
|
||
"dateReserved": "2026-08-12T16:45:03.511Z",
|
||
"datePublished": "2026-09-15T23:16:27.270Z",
|
||
"dateUpdated": "2026-09-16T19:34:44.583Z"
|
||
},
|
||
"containers": {
|
||
"cna": {
|
||
"providerMetadata": {
|
||
"orgId": "c8b34d1a-69ae-45c3-88fe-f3b3d44f39b7",
|
||
"shortName": "Arista",
|
||
"dateUpdated": "2026-09-15T23:16:27.270Z"
|
||
},
|
||
"title": "Security Advisory 0160",
|
||
"problemTypes": [
|
||
{
|
||
"descriptions": [
|
||
{
|
||
"lang": "en",
|
||
"cweId": "CWE-354",
|
||
"description": "CWE-354: Improper Validation of Integrity Check Value",
|
||
"type": "CWE"
|
||
}
|
||
]
|
||
}
|
||
],
|
||
"impacts": [
|
||
{
|
||
"capecId": "CAPEC-272",
|
||
"descriptions": [
|
||
{
|
||
"lang": "en",
|
||
"value": "CAPEC-272 Protocol Manipulation"
|
||
}
|
||
]
|
||
}
|
||
],
|
||
"affected": [
|
||
{
|
||
"vendor": "Arista Networks",
|
||
"product": "EOS",
|
||
"versions": [
|
||
{
|
||
"status": "affected",
|
||
"version": "4.36.0",
|
||
"lessThanOrEqual": "4.36.1F",
|
||
"versionType": "custom"
|
||
}
|
||
],
|
||
"defaultStatus": "unaffected"
|
||
}
|
||
],
|
||
"descriptions": [
|
||
{
|
||
"lang": "en",
|
||
"value": "On affected platforms running Arista EOS with IS-IS configured, an unauthenticated attacker who can inject a specially crafted IS-IS LSP PDU can cause the legitimate LSP to be unexpectedly purged from the IS-IS link-state database. This may result in traffic loss.",
|
||
"supportingMedia": [
|
||
{
|
||
"type": "text/html",
|
||
"base64": false,
|
||
"value": "<p>On affected platforms running Arista EOS with IS-IS configured, an unauthenticated attacker who can inject a specially crafted IS-IS LSP PDU can cause the legitimate LSP to be unexpectedly purged from the IS-IS link-state database. This may result in traffic loss.</p>"
|
||
}
|
||
]
|
||
}
|
||
],
|
||
"references": [
|
||
{
|
||
"url": "https://www.arista.com/en/support/advisories-notices/security-advisory/24716-security-advisory-0160",
|
||
"name": "Security Advisory 0160",
|
||
"tags": [
|
||
"vendor-advisory"
|
||
]
|
||
}
|
||
],
|
||
"metrics": [
|
||
{
|
||
"format": "CVSS",
|
||
"scenarios": [
|
||
{
|
||
"lang": "en",
|
||
"value": "GENERAL"
|
||
}
|
||
],
|
||
"cvssV3_1": {
|
||
"version": "3.1",
|
||
"attackVector": "ADJACENT_NETWORK",
|
||
"attackComplexity": "LOW",
|
||
"privilegesRequired": "NONE",
|
||
"userInteraction": "NONE",
|
||
"scope": "CHANGED",
|
||
"confidentialityImpact": "NONE",
|
||
"integrityImpact": "NONE",
|
||
"availabilityImpact": "HIGH",
|
||
"baseSeverity": "HIGH",
|
||
"baseScore": 7.4,
|
||
"vectorString": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H"
|
||
}
|
||
},
|
||
{
|
||
"format": "CVSS",
|
||
"scenarios": [
|
||
{
|
||
"lang": "en",
|
||
"value": "GENERAL"
|
||
}
|
||
],
|
||
"cvssV4_0": {
|
||
"attackVector": "ADJACENT",
|
||
"attackComplexity": "LOW",
|
||
"attackRequirements": "PRESENT",
|
||
"privilegesRequired": "NONE",
|
||
"userInteraction": "NONE",
|
||
"vulnConfidentialityImpact": "NONE",
|
||
"subConfidentialityImpact": "NONE",
|
||
"vulnIntegrityImpact": "NONE",
|
||
"subIntegrityImpact": "NONE",
|
||
"vulnAvailabilityImpact": "HIGH",
|
||
"subAvailabilityImpact": "HIGH",
|
||
"exploitMaturity": "NOT_DEFINED",
|
||
"Safety": "NOT_DEFINED",
|
||
"Automatable": "NOT_DEFINED",
|
||
"Recovery": "NOT_DEFINED",
|
||
"valueDensity": "NOT_DEFINED",
|
||
"vulnerabilityResponseEffort": "NOT_DEFINED",
|
||
"providerUrgency": "NOT_DEFINED",
|
||
"version": "4.0",
|
||
"baseSeverity": "HIGH",
|
||
"baseScore": 7,
|
||
"vectorString": "CVSS:4.0/AV:A/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:H"
|
||
}
|
||
}
|
||
],
|
||
"configurations": [
|
||
{
|
||
"lang": "en",
|
||
"value": "In order to be vulnerable to CVE-2026-73459, the following condition must be met: \n\nIS-IS should be configured.\n\n\n\nswitch# show isis summary\nIS-IS Instance: 1 VRF: default\n Instance ID: 0\n System ID: 1111.1111.1001, administratively enabled\n Router ID: IPv4: 0.0.0.0\n Multi Topology disabled, not attached\n IPv4 Preference: Level 1: 115, Level 2: 115\n IPv6 Preference: Level 1: 115, Level 2: 115\n IS-Type: Level 1 and 2, Number active interfaces: 1\n Routes both IPv4 and IPv6\n LSP size maximum: Level 1: 1492, Level 2: 1492\n Interval Type Max Wait Initial Wait Hold Interval\n ----------------------- -------- ------------ -------------\n LSP generation interval 5 s 50 ms 50 ms\n SPF interval 30000 ms 300 ms 80 ms\n Current SPF hold interval(ms): Level 1: 80, Level 2: 80\n Last Level 1 SPF run 9 seconds ago\n Last Level 2 SPF run 9 seconds ago\n CSNP generation interval: 10 seconds\n Dynamic Flooding: Disabled\n Authentication mode: Level 1: None, Level 2: None\n Graceful Restart: Disabled, Graceful Restart Helper: Enabled\n Area addresses: 40\n level 1: number DIS interfaces: 0, LSDB size: 1\n Area Leader: None\n Overload Bit is not set. \n level 2: number DIS interfaces: 0, LSDB size: 1\n Area Leader: None\n Overload Bit is not set. \n Redistributed Level 1 routes: 0 limit: Not Configured\n Redistributed Level 2 routes: 0 limit: Not Configured\n\n\n\nIf IS-IS is not configured, there is no exposure to this issue.\n\n\n\n\nswitch#show isis summary\nswitch#",
|
||
"supportingMedia": [
|
||
{
|
||
"type": "text/html",
|
||
"base64": false,
|
||
"value": "<p>In order to be vulnerable to CVE-2026-73459, the following condition must be met: <br><br>IS-IS should be configured.</p><pre>switch# show isis summary\nIS-IS Instance: 1 VRF: default\n Instance ID: 0\n System ID: 1111.1111.1001, administratively enabled\n Router ID: IPv4: 0.0.0.0\n Multi Topology disabled, not attached\n IPv4 Preference: Level 1: 115, Level 2: 115\n IPv6 Preference: Level 1: 115, Level 2: 115\n IS-Type: Level 1 and 2, Number active interfaces: 1\n Routes both IPv4 and IPv6\n LSP size maximum: Level 1: 1492, Level 2: 1492\n Interval Type Max Wait Initial Wait Hold Interval\n ----------------------- -------- ------------ -------------\n LSP generation interval 5 s 50 ms 50 ms\n SPF interval 30000 ms 300 ms 80 ms\n Current SPF hold interval(ms): Level 1: 80, Level 2: 80\n Last Level 1 SPF run 9 seconds ago\n Last Level 2 SPF run 9 seconds ago\n CSNP generation interval: 10 seconds\n Dynamic Flooding: Disabled\n Authentication mode: Level 1: None, Level 2: None\n Graceful Restart: Disabled, Graceful Restart Helper: Enabled\n Area addresses: 40\n level 1: number DIS interfaces: 0, LSDB size: 1\n Area Leader: None\n Overload Bit is not set. \n level 2: number DIS interfaces: 0, LSDB size: 1\n Area Leader: None\n Overload Bit is not set. \n Redistributed Level 1 routes: 0 limit: Not Configured\n Redistributed Level 2 routes: 0 limit: Not Configured</pre><p>If IS-IS is not configured, there is no exposure to this issue.<br></p><pre>switch#show isis summary\nswitch# </pre>"
|
||
}
|
||
]
|
||
}
|
||
],
|
||
"workarounds": [
|
||
{
|
||
"lang": "en",
|
||
"value": "No workaround is available for this issue.",
|
||
"supportingMedia": [
|
||
{
|
||
"type": "text/html",
|
||
"base64": false,
|
||
"value": "<p>No workaround is available for this issue.</p>"
|
||
}
|
||
]
|
||
}
|
||
],
|
||
"solutions": [
|
||
{
|
||
"lang": "en",
|
||
"value": "The recommended resolution is to upgrade to a fixed software version.",
|
||
"supportingMedia": [
|
||
{
|
||
"type": "text/html",
|
||
"base64": false,
|
||
"value": "<p>The recommended resolution is to upgrade to a fixed software version.</p>"
|
||
}
|
||
]
|
||
}
|
||
],
|
||
"credits": [
|
||
{
|
||
"lang": "en",
|
||
"value": "This issue was discovered internally by Arista and the company is not aware of any malicious uses of these issues in customer networks.",
|
||
"type": "finder"
|
||
}
|
||
],
|
||
"source": {
|
||
"advisory": "0160",
|
||
"discovery": "UNKNOWN",
|
||
"defects": [
|
||
"BUG1840507"
|
||
]
|
||
},
|
||
"x_generator": {
|
||
"engine": "Vulnogram 1.0.5"
|
||
}
|
||
},
|
||
"adp": [
|
||
{
|
||
"metrics": [
|
||
{
|
||
"other": {
|
||
"type": "ssvc",
|
||
"content": {
|
||
"timestamp": "2026-09-16T19:34:28.975379Z",
|
||
"id": "CVE-2026-73459",
|
||
"options": [
|
||
{
|
||
"Exploitation": "none"
|
||
},
|
||
{
|
||
"Automatable": "no"
|
||
},
|
||
{
|
||
"Technical Impact": "partial"
|
||
}
|
||
],
|
||
"role": "CISA Coordinator",
|
||
"version": "2.0.3"
|
||
}
|
||
}
|
||
}
|
||
],
|
||
"title": "CISA ADP Vulnrichment",
|
||
"providerMetadata": {
|
||
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
|
||
"shortName": "CISA-ADP",
|
||
"dateUpdated": "2026-09-16T19:34:44.583Z"
|
||
}
|
||
}
|
||
]
|
||
}
|
||
} |