CVE-2025-8870 (GCVE-0-2025-8870)
Vulnerability from cvelistv5
Published
2025-11-14 15:57
Modified
2025-11-14 16:29
Severity ?
4.9 (Medium) - CVSS:3.1/AV:P/AC:H/PR:N/UI:N/S:C/C:N/I:N/A:H
5.6 (Medium) - CVSS:4.0/AV:P/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:H
CWE
Summary
On affected platforms running Arista EOS, certain serial console input might result in an unexpected reload of the device.153
References
Impacted products
Vendor Product Version
Arista Networks EOS Version: 4.34.2FX   <
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              "value": "\u003cb\u003e\u003cp\u003e\u003cspan style=\"background-color: transparent;\"\u003eIn order to be vulnerable to CVE-2025-8870, both of the following conditions must be met:\u003c/span\u003e\u003c/p\u003e\u003cbr\u003e\u003col\u003e\u003cli\u003e\u003cp\u003e\u003cspan style=\"background-color: transparent;\"\u003eAn attacker must have a serial interface connection to the device or access to remotely access the console via the console port. Network remote access does not cause this issue.\u003c/span\u003e\u003c/p\u003e\u003c/li\u003e\u003c/ol\u003e\u003cp\u003e\u003cspan style=\"background-color: transparent;\"\u003eAND\u003c/span\u003e\u003c/p\u003e\u003col\u003e\u003cli\u003e\u003cp\u003e\u003cspan style=\"background-color: transparent;\"\u003eDevice must be using the Synopsys Designware serial model:\u003c/span\u003e\u003c/p\u003e\u003c/li\u003e\u003c/ol\u003e\u003cbr\u003e\u003cdiv\u003e\u003ctable\u003e\u003ctbody\u003e\u003ctr\u003e\u003ctd\u003e\u003cp\u003e\u003cspan style=\"background-color: transparent;\"\u003e#bash dmesg | grep \"Synopsys DesignWare\"\u003c/span\u003e\u003c/p\u003e\u003cp\u003e\u003cspan style=\"background-color: transparent;\"\u003e[  \u0026nbsp; 1.287358] 10200000.serial: ttyS0 at MMIO 0x10200000 (irq = 15, base_baud = 15625000) is a \u003c/span\u003e\u003cspan style=\"background-color: rgb(255, 255, 0);\"\u003eSynopsys DesignWare\u003c/span\u003e\u003c/p\u003e\u003cp\u003e\u003cspan style=\"background-color: transparent;\"\u003e[  \u0026nbsp; 1.287845] 10201000.serial: ttyS1 at MMIO 0x10201000 (irq = 164, base_baud = 15625000) is a Synopsys DesignWare\u003c/span\u003e\u003c/p\u003e\u003c/td\u003e\u003c/tr\u003e\u003c/tbody\u003e\u003c/table\u003e\u003c/div\u003e\u003c/b\u003e\u003cbr\u003e"
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For more information about upgrading see \u003c/span\u003e\u003ca target=\\\"_blank\\\" rel=\\\"nofollow\\\" href=\\\"https://www.arista.com/en/um-eos/eos-upgrades-and-downgrades\\\"\u003e\u003cspan style=\\\"background-color: transparent;\\\"\u003eEOS User Manual: Upgrades and Downgrades\u003c/span\u003e\u003c/a\u003e\u003c/p\u003e\u003cbr\u003e\u003cp\u003e\u003cspan style=\\\"background-color: transparent;\\\"\u003eCVE-2025-8870 has been fixed in the following releases:\u003c/span\u003e\u003c/p\u003e\u003cul\u003e\u003cli\u003e\u003cp\u003e\u003cspan style=\\\"background-color: transparent;\\\"\u003e4.35.0F and later releases\u003c/span\u003e\u003c/p\u003e\u003c/li\u003e\u003c/ul\u003e\u003c/b\u003e\u003cbr\u003e\", \"base64\": false}]}], \"datePublic\": \"2025-11-11T14:00:00.000Z\", \"references\": [{\"url\": \"https://www.arista.com/en/support/advisories-notices/security-advisory/22811-security-advisory-0125\"}], \"workarounds\": [{\"lang\": \"en\", \"value\": \"The mitigation is to limit access to the serial console.\", \"supportingMedia\": [{\"type\": \"text/html\", \"value\": \"\u003cb\u003e\u003cspan style=\\\"background-color: transparent;\\\"\u003eThe mitigation is to limit access to the serial console.\u003c/span\u003e\u003c/b\u003e\u003cbr\u003e\", \"base64\": false}]}], \"x_generator\": {\"engine\": \"Vulnogram 0.5.0\"}, \"descriptions\": [{\"lang\": \"en\", \"value\": \"On affected platforms running Arista EOS, certain serial console input might result in an unexpected reload of the device.153\", \"supportingMedia\": [{\"type\": \"text/html\", \"value\": \"\u003cb\u003e\u003cspan style=\\\"background-color: transparent;\\\"\u003eOn affected platforms running Arista EOS, certain serial console input might result in an unexpected reload of the device.153\u003c/span\u003e\u003c/b\u003e\u003cbr\u003e\", \"base64\": false}]}], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en\", \"type\": \"CWE\", \"cweId\": \"CWE-248\", \"description\": \"CWE-248\"}]}], \"configurations\": [{\"lang\": \"en\", \"value\": \"In order to be vulnerable to CVE-2025-8870, both of the following conditions must be met:\\n\\n\\n  *  An attacker must have a serial interface connection to the device or access to remotely access the console via the console port. Network remote access does not cause this issue.\\n\\n\\nAND\\n\\n  *  Device must be using the Synopsys Designware serial model:\\n\\n\\n\\n#bash dmesg | grep \\\"Synopsys DesignWare\\\"\\n\\n[  \\u00a0 1.287358] 10200000.serial: ttyS0 at MMIO 0x10200000 (irq = 15, base_baud = 15625000) is a Synopsys DesignWare\\n\\n[  \\u00a0 1.287845] 10201000.serial: ttyS1 at MMIO 0x10201000 (irq = 164, base_baud = 15625000) is a Synopsys DesignWare\", \"supportingMedia\": [{\"type\": \"text/html\", \"value\": \"\u003cb\u003e\u003cp\u003e\u003cspan style=\\\"background-color: transparent;\\\"\u003eIn order to be vulnerable to CVE-2025-8870, both of the following conditions must be met:\u003c/span\u003e\u003c/p\u003e\u003cbr\u003e\u003col\u003e\u003cli\u003e\u003cp\u003e\u003cspan style=\\\"background-color: transparent;\\\"\u003eAn attacker must have a serial interface connection to the device or access to remotely access the console via the console port. Network remote access does not cause this issue.\u003c/span\u003e\u003c/p\u003e\u003c/li\u003e\u003c/ol\u003e\u003cp\u003e\u003cspan style=\\\"background-color: transparent;\\\"\u003eAND\u003c/span\u003e\u003c/p\u003e\u003col\u003e\u003cli\u003e\u003cp\u003e\u003cspan style=\\\"background-color: transparent;\\\"\u003eDevice must be using the Synopsys Designware serial model:\u003c/span\u003e\u003c/p\u003e\u003c/li\u003e\u003c/ol\u003e\u003cbr\u003e\u003cdiv\u003e\u003ctable\u003e\u003ctbody\u003e\u003ctr\u003e\u003ctd\u003e\u003cp\u003e\u003cspan style=\\\"background-color: transparent;\\\"\u003e#bash dmesg | grep \\\"Synopsys DesignWare\\\"\u003c/span\u003e\u003c/p\u003e\u003cp\u003e\u003cspan style=\\\"background-color: transparent;\\\"\u003e[  \u0026nbsp; 1.287358] 10200000.serial: ttyS0 at MMIO 0x10200000 (irq = 15, base_baud = 15625000) is a \u003c/span\u003e\u003cspan style=\\\"background-color: rgb(255, 255, 0);\\\"\u003eSynopsys DesignWare\u003c/span\u003e\u003c/p\u003e\u003cp\u003e\u003cspan style=\\\"background-color: transparent;\\\"\u003e[  \u0026nbsp; 1.287845] 10201000.serial: ttyS1 at MMIO 0x10201000 (irq = 164, base_baud = 15625000) is a Synopsys DesignWare\u003c/span\u003e\u003c/p\u003e\u003c/td\u003e\u003c/tr\u003e\u003c/tbody\u003e\u003c/table\u003e\u003c/div\u003e\u003c/b\u003e\u003cbr\u003e\", \"base64\": false}]}], \"cpeApplicability\": [{\"nodes\": [{\"negate\": false, \"cpeMatch\": [{\"criteria\": \"cpe:2.3:a:arista_networks:eos:4.34.2fx:*:710x_series:*:*:*:*:*\", \"vulnerable\": true}], \"operator\": \"OR\"}], \"operator\": \"OR\"}], \"providerMetadata\": {\"orgId\": \"c8b34d1a-69ae-45c3-88fe-f3b3d44f39b7\", \"shortName\": \"Arista\", \"dateUpdated\": \"2025-11-14T15:57:04.673Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2025-8870\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2025-11-14T16:29:13.516Z\", \"dateReserved\": \"2025-08-11T18:15:44.614Z\", \"assignerOrgId\": \"c8b34d1a-69ae-45c3-88fe-f3b3d44f39b7\", \"datePublished\": \"2025-11-14T15:57:04.673Z\", \"assignerShortName\": \"Arista\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}


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