cisco-sa-sb220-lldp-multivuls-mVRUtQ8T
Vulnerability from csaf_cisco
Published
2021-10-06 16:00
Modified
2022-01-13 21:37
Summary
Cisco Small Business 220 Series Smart Switches Link Layer Discovery Protocol Vulnerabilities

Notes

Summary
Multiple vulnerabilities exist in the Link Layer Discovery Protocol (LLDP) implementation for Cisco Small Business 220 Series Smart Switches. An unauthenticated, adjacent attacker could perform the following: Execute code on the affected device or cause it to reload unexpectedly Cause LLDP database corruption on the affected device For more information about these vulnerabilities, see the Details ["#details"] section of this advisory. Note: LLDP is a Layer 2 protocol. To exploit these vulnerabilities, an attacker must be in the same broadcast domain as the affected device (Layer 2 adjacent). Cisco has released firmware updates that address these vulnerabilities. There are no workarounds that address these vulnerabilities. This advisory is available at the following link: https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-sb220-lldp-multivuls-mVRUtQ8T ["https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-sb220-lldp-multivuls-mVRUtQ8T"]
Vulnerable Products
These vulnerabilities affect Cisco Small Business 220 Series Smart Switches if they are running a vulnerable firmware release and have the LLDP feature enabled. Note: LLDP is enabled by default on all LAN ports on Cisco Small Business 220 Series Smart Switches. For information about which Cisco firmware releases are vulnerable, see the Fixed Software ["#fs"] section of this advisory.
Products Confirmed Not Vulnerable
Only products listed in the Vulnerable Products ["#vp"] section of this advisory are known to be affected by these vulnerabilities.
Details
The vulnerabilities are not dependent on one another. Exploitation of one of the vulnerabilities is not required to exploit another vulnerability. In addition, a software release that is affected by one of the vulnerabilities may not be affected by the other vulnerabilities. Details about the vulnerabilities are as follows: CVE-2021-34779, CVE-2021-34780: Cisco Small Business 220 Series Smart Switches Link Layer Discovery Protocol Denial of Service Vulnerabilities Multiple vulnerabilities in the Link Layer Discovery Protocol of Cisco Small Business 220 Series Smart Switches could allow an unauthenticated, adjacent attacker to cause an affected device to reload unexpectedly. These vulnerabilities are due to insufficient boundary checks when processing LLDP messages. An attacker could exploit these vulnerabilities by sending a malicious LLDP packet to the targeted device. A successful exploit could allow the attacker to execute code on the affected device or cause it to reload unexpectedly, resulting in a denial of service condition. Cisco has released firmware updates that address these vulnerabilities. There are no workarounds that address these vulnerabilities. Bug ID(s): CSCvz29121 ["https://bst.cloudapps.cisco.com/bugsearch/bug/CSCvz29121"], CSCwa32673 ["https://bst.cloudapps.cisco.com/bugsearch/bug/CSCwa32673"], CSCvz29126 ["https://bst.cloudapps.cisco.com/bugsearch/bug/CSCvz29126"], CSCwa32708 ["https://bst.cloudapps.cisco.com/bugsearch/bug/CSCwa32708"] CVE ID: CVE-2021-34779, CVE-2021-34780 Security Impact Rating (SIR): High CVSS Base Score: 8.8 CVSS Vector: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H CVE-2021-34775, CVE-2021-34776, CVE-2021-34777, CVE-2021-34778: Cisco Small Business 220 Series Smart Switches Link Layer Discovery Protocol Database Corruption Vulnerabilities Multiple vulnerabilities in the Link Layer Discovery Protocol of Cisco Small Business 220 Series Smart Switches could allow an unauthenticated, adjacent attacker to cause LLDP memory corruption on an affected device. These vulnerabilities are due to missing length validation checks when processing LLDP messages. An attacker could exploit these vulnerabilities by sending a malicious LLDP packet to the targeted device. A successful exploit could allow the attacker to cause an out-of-bounds read of the valid LLDP packet data, which could allow the attacker to cause corruption in the internal LLDP database of the affected device. Cisco has released firmware updates that address these vulnerabilities. There are no workarounds that address these vulnerabilities. Bug ID(s): CSCvz29108, ["https://bst.cloudapps.cisco.com/bugsearch/bug/CSCvz29108"] CSCwa32785 ["https://bst.cloudapps.cisco.com/bugsearch/bug/CSCwa32785"], CSCvz29116 ["https://bst.cloudapps.cisco.com/bugsearch/bug/CSCvz29116"], CSCwa32762 ["https://bst.cloudapps.cisco.com/bugsearch/bug/CSCwa32762"], CSCvz29120, ["https://bst.cloudapps.cisco.com/bugsearch/bug/CSCvz29120"] CSCwa32793 ["https://bst.cloudapps.cisco.com/bugsearch/bug/CSCwa32793"], CSCvz29134 ["https://bst.cloudapps.cisco.com/bugsearch/bug/CSCvz29134"], CSCwa32782 ["https://bst.cloudapps.cisco.com/bugsearch/bug/CSCwa32782"] CVE ID: CVE-2021-34775, CVE-2021-34776, CVE-2021-34777, CVE-2021-34778 Security Impact Rating (SIR): Medium CVSS Base Score: 4.3 CVSS Vector: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
Workarounds
There are no workarounds that address these vulnerabilities. However, administrators may disable the affected feature. To disable LLDP on the LAN interface of a device, do the following: Open the web-based management interface and choose Administration > Discovery LLDP > Properties. Uncheck the LLDP Status check box. While this mitigation has been deployed and was proven successful in a test environment, customers should determine the applicability and effectiveness in their own environment and under their own use conditions. Customers should be aware that any workaround or mitigation that is implemented may negatively impact the functionality or performance of their network based on intrinsic customer deployment scenarios and limitations. Customers should not deploy any workarounds or mitigations before first evaluating the applicability to their own environment and any impact to such environment.
Fixed Software
Cisco has released free software updates that address the vulnerabilities described in this advisory. Customers may only install and expect support for software versions and feature sets for which they have purchased a license. By installing, downloading, accessing, or otherwise using such software upgrades, customers agree to follow the terms of the Cisco software license: https://www.cisco.com/c/en/us/products/end-user-license-agreement.html ["https://www.cisco.com/c/en/us/products/end-user-license-agreement.html"] Additionally, customers may only download software for which they have a valid license, procured from Cisco directly, or through a Cisco authorized reseller or partner. In most cases this will be a maintenance upgrade to software that was previously purchased. Free security software updates do not entitle customers to a new software license, additional software feature sets, or major revision upgrades. When considering software upgrades ["https://sec.cloudapps.cisco.com/security/center/resources/security_vulnerability_policy.html#fixes"], customers are advised to regularly consult the advisories for Cisco products, which are available from the Cisco Security Advisories page ["https://www.cisco.com/go/psirt"], to determine exposure and a complete upgrade solution. In all cases, customers should ensure that the devices to be upgraded contain sufficient memory and confirm that current hardware and software configurations will continue to be supported properly by the new release. If the information is not clear, customers are advised to contact the Cisco Technical Assistance Center (TAC) or their contracted maintenance providers. Customers Without Service Contracts Customers who purchase directly from Cisco but do not hold a Cisco service contract and customers who make purchases through third-party vendors but are unsuccessful in obtaining fixed software through their point of sale should obtain upgrades by contacting the Cisco TAC: https://www.cisco.com/c/en/us/support/web/tsd-cisco-worldwide-contacts.html ["https://www.cisco.com/c/en/us/support/web/tsd-cisco-worldwide-contacts.html"] Customers should have the product serial number available and be prepared to provide the URL of this advisory as evidence of entitlement to a free upgrade. Fixed Releases In the following table(s), the left column lists Cisco firmware releases. The right column indicates whether a release is affected by the vulnerabilities described in this advisory and the first release that includes the fix for these vulnerabilities. Customers are advised to upgrade to an appropriate fixed firmware release as indicated in this section. Cisco Product Cisco Firmware Release First Fixed Release Small Business 220 Series Smart Switches 1.2.1.2 and earlier 1.2.1.5 Business 220 Series Smart Switches 2.0.1.5 and earlier 2.0.1.9 To download the firmware from the Software Center ["https://software.cisco.com/download/navigator.html"] on Cisco.com, click Browse all and navigate to Switches > LAN Switches - Small Business > 220 Series Smart Switches or Business 220 Series Smart Switches. The Cisco Product Security Incident Response Team (PSIRT) validates only the affected and fixed release information that is documented in this advisory.
Vulnerability Policy
To learn about Cisco security vulnerability disclosure policies and publications, see the Security Vulnerability Policy ["https://sec.cloudapps.cisco.com/security/center/resources/security_vulnerability_policy.html"]. This document also contains instructions for obtaining fixed software and receiving security vulnerability information from Cisco.
Exploitation and Public Announcements
The Cisco PSIRT is not aware of any public announcements or malicious use of the vulnerabilities that are described in this advisory.
Source
Cisco would like to thank Qian Chen of the Codesafe Team of Legendsec at Qi'anxin Group for reporting these vulnerabilities.
Legal Disclaimer
THIS DOCUMENT IS PROVIDED ON AN "AS IS" BASIS AND DOES NOT IMPLY ANY KIND OF GUARANTEE OR WARRANTY, INCLUDING THE WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR USE. YOUR USE OF THE INFORMATION ON THE DOCUMENT OR MATERIALS LINKED FROM THE DOCUMENT IS AT YOUR OWN RISK. CISCO RESERVES THE RIGHT TO CHANGE OR UPDATE THIS DOCUMENT AT ANY TIME. A standalone copy or paraphrase of the text of this document that omits the distribution URL is an uncontrolled copy and may lack important information or contain factual errors. The information in this document is intended for end users of Cisco products.


To clipboard 

{
  "document": {
    "acknowledgments": [
      {
        "summary": "Cisco would like to thank Qian Chen of the Codesafe Team of Legendsec at Qi\u0027anxin Group for reporting these vulnerabilities."
      }
    ],
    "category": "csaf_security_advisory",
    "csaf_version": "2.0",
    "notes": [
      {
        "category": "summary",
        "text": "Multiple vulnerabilities exist in the Link Layer Discovery Protocol (LLDP) implementation for Cisco Small Business 220 Series Smart Switches. An unauthenticated, adjacent attacker could perform the following:\r\n\r\nExecute code on the affected device or cause it to reload unexpectedly\r\nCause LLDP database corruption on the affected device\r\n\r\nFor more information about these vulnerabilities, see the Details [\"#details\"] section of this advisory.\r\n\r\nNote: LLDP is a Layer 2 protocol. To exploit these vulnerabilities, an attacker must be in the same broadcast domain as the affected device (Layer 2 adjacent).\r\n\r\nCisco has released firmware updates that address these vulnerabilities. There are no workarounds that address these vulnerabilities.\r\n\r\nThis advisory is available at the following link:\r\nhttps://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-sb220-lldp-multivuls-mVRUtQ8T [\"https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-sb220-lldp-multivuls-mVRUtQ8T\"]",
        "title": "Summary"
      },
      {
        "category": "general",
        "text": "These vulnerabilities affect Cisco Small Business 220 Series Smart Switches if they are running a vulnerable firmware release and have the LLDP feature enabled.\r\n\r\nNote: LLDP is enabled by default on all LAN ports on Cisco Small Business 220 Series Smart Switches.\r\n\r\nFor information about which Cisco firmware releases are vulnerable, see the Fixed Software [\"#fs\"] section of this advisory.",
        "title": "Vulnerable Products"
      },
      {
        "category": "general",
        "text": "Only products listed in the Vulnerable Products [\"#vp\"] section of this advisory are known to be affected by these vulnerabilities.",
        "title": "Products Confirmed Not Vulnerable"
      },
      {
        "category": "general",
        "text": "The vulnerabilities are not dependent on one another. Exploitation of one of the vulnerabilities is not required to exploit another vulnerability. In addition, a software release that is affected by one of the vulnerabilities may not be affected by the other vulnerabilities.\r\n\r\nDetails about the vulnerabilities are as follows:\r\n\r\nCVE-2021-34779, CVE-2021-34780:\r\nCisco Small Business 220 Series Smart Switches Link Layer Discovery Protocol Denial of Service Vulnerabilities\r\n\r\nMultiple vulnerabilities in the Link Layer Discovery Protocol of Cisco Small Business 220 Series Smart Switches could allow an unauthenticated, adjacent attacker to cause an affected device to reload unexpectedly.\r\n\r\nThese vulnerabilities are due to insufficient boundary checks when processing LLDP messages. An attacker could exploit these vulnerabilities by sending a malicious LLDP packet to the targeted device. A successful exploit could allow the attacker to execute code on the affected device or cause it to reload unexpectedly, resulting in a denial of service condition.\r\n\r\nCisco has released firmware updates that address these vulnerabilities. There are no workarounds that address these vulnerabilities.\r\n\r\nBug ID(s): CSCvz29121 [\"https://bst.cloudapps.cisco.com/bugsearch/bug/CSCvz29121\"], CSCwa32673 [\"https://bst.cloudapps.cisco.com/bugsearch/bug/CSCwa32673\"], CSCvz29126 [\"https://bst.cloudapps.cisco.com/bugsearch/bug/CSCvz29126\"], CSCwa32708 [\"https://bst.cloudapps.cisco.com/bugsearch/bug/CSCwa32708\"]\r\nCVE ID: CVE-2021-34779, CVE-2021-34780\r\nSecurity Impact Rating (SIR): High\r\nCVSS Base Score: 8.8\r\nCVSS Vector: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H\r\n\r\nCVE-2021-34775, CVE-2021-34776, CVE-2021-34777, CVE-2021-34778:\r\nCisco Small Business 220 Series Smart Switches Link Layer Discovery Protocol Database Corruption Vulnerabilities\r\n\r\nMultiple vulnerabilities in the Link Layer Discovery Protocol of Cisco Small Business 220 Series Smart Switches could allow an unauthenticated, adjacent attacker to cause LLDP memory corruption on an affected device.\r\n\r\nThese vulnerabilities are due to missing length validation checks when processing LLDP messages. An attacker could exploit these vulnerabilities by sending a malicious LLDP packet to the targeted device. A successful exploit could allow the attacker to cause an out-of-bounds read of the valid LLDP packet data, which could allow the attacker to cause corruption in the internal LLDP database of the affected device.\r\n\r\nCisco has released firmware updates that address these vulnerabilities. There are no workarounds that address these vulnerabilities.\r\n\r\nBug ID(s): CSCvz29108, [\"https://bst.cloudapps.cisco.com/bugsearch/bug/CSCvz29108\"] CSCwa32785 [\"https://bst.cloudapps.cisco.com/bugsearch/bug/CSCwa32785\"], CSCvz29116 [\"https://bst.cloudapps.cisco.com/bugsearch/bug/CSCvz29116\"], CSCwa32762 [\"https://bst.cloudapps.cisco.com/bugsearch/bug/CSCwa32762\"], CSCvz29120, [\"https://bst.cloudapps.cisco.com/bugsearch/bug/CSCvz29120\"] CSCwa32793 [\"https://bst.cloudapps.cisco.com/bugsearch/bug/CSCwa32793\"], CSCvz29134 [\"https://bst.cloudapps.cisco.com/bugsearch/bug/CSCvz29134\"], CSCwa32782 [\"https://bst.cloudapps.cisco.com/bugsearch/bug/CSCwa32782\"]\r\nCVE ID: CVE-2021-34775, CVE-2021-34776, CVE-2021-34777, CVE-2021-34778\r\nSecurity Impact Rating (SIR): Medium\r\nCVSS Base Score: 4.3\r\nCVSS Vector: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N",
        "title": "Details"
      },
      {
        "category": "general",
        "text": "There are no workarounds that address these vulnerabilities. However, administrators may disable the affected feature.\r\n\r\nTo disable LLDP on the LAN interface of a device, do the following:\r\n\r\nOpen the web-based management interface and choose Administration \u003e Discovery LLDP \u003e Properties.\r\nUncheck the LLDP Status check box.\r\n\r\nWhile this mitigation has been deployed and was proven successful in a test environment, customers should determine the applicability and effectiveness in their own environment and under their own use conditions. Customers should be aware that any workaround or mitigation that is implemented may negatively impact the functionality or performance of their network based on intrinsic customer deployment scenarios and limitations. Customers should not deploy any workarounds or mitigations before first evaluating the applicability to their own environment and any impact to such environment.",
        "title": "Workarounds"
      },
      {
        "category": "general",
        "text": "Cisco has released free software updates that address the vulnerabilities described in this advisory. Customers may only install and expect support for software versions and feature sets for which they have purchased a license. By installing, downloading, accessing, or otherwise using such software upgrades, customers agree to follow the terms of the Cisco software license:\r\nhttps://www.cisco.com/c/en/us/products/end-user-license-agreement.html [\"https://www.cisco.com/c/en/us/products/end-user-license-agreement.html\"]\r\n\r\nAdditionally, customers may only download software for which they have a valid license, procured from Cisco directly, or through a Cisco authorized reseller or partner. In most cases this will be a maintenance upgrade to software that was previously purchased. Free security software updates do not entitle customers to a new software license, additional software feature sets, or major revision upgrades.\r\n\r\nWhen considering software upgrades [\"https://sec.cloudapps.cisco.com/security/center/resources/security_vulnerability_policy.html#fixes\"], customers are advised to regularly consult the advisories for Cisco products, which are available from the Cisco Security Advisories page [\"https://www.cisco.com/go/psirt\"], to determine exposure and a complete upgrade solution.\r\n\r\nIn all cases, customers should ensure that the devices to be upgraded contain sufficient memory and confirm that current hardware and software configurations will continue to be supported properly by the new release. If the information is not clear, customers are advised to contact the Cisco Technical Assistance Center (TAC) or their contracted maintenance providers.\r\n  Customers Without Service Contracts\r\nCustomers who purchase directly from Cisco but do not hold a Cisco service contract and customers who make purchases through third-party vendors but are unsuccessful in obtaining fixed software through their point of sale should obtain upgrades by contacting the Cisco TAC: https://www.cisco.com/c/en/us/support/web/tsd-cisco-worldwide-contacts.html [\"https://www.cisco.com/c/en/us/support/web/tsd-cisco-worldwide-contacts.html\"]\r\n\r\nCustomers should have the product serial number available and be prepared to provide the URL of this advisory as evidence of entitlement to a free upgrade.\r\n      Fixed Releases\r\nIn the following table(s), the left column lists Cisco firmware releases. The right column indicates whether a release is affected by the vulnerabilities described in this advisory and the first release that includes the fix for these vulnerabilities. Customers are advised to upgrade to an appropriate fixed firmware release as indicated in this section.\r\n        Cisco Product  Cisco Firmware Release  First Fixed Release          Small Business 220 Series Smart Switches  1.2.1.2 and earlier  1.2.1.5      Business 220 Series Smart Switches  2.0.1.5 and earlier  2.0.1.9\r\nTo download the firmware from the Software Center [\"https://software.cisco.com/download/navigator.html\"] on Cisco.com, click Browse all and navigate to Switches \u003e LAN Switches - Small Business \u003e 220 Series Smart Switches or Business 220 Series Smart Switches.\r\n\r\nThe Cisco Product Security Incident Response Team (PSIRT) validates only the affected and fixed release information that is documented in this advisory.",
        "title": "Fixed Software"
      },
      {
        "category": "general",
        "text": "To learn about Cisco security vulnerability disclosure policies and publications, see the Security Vulnerability Policy [\"https://sec.cloudapps.cisco.com/security/center/resources/security_vulnerability_policy.html\"]. This document also contains instructions for obtaining fixed software and receiving security vulnerability information from Cisco.",
        "title": "Vulnerability Policy"
      },
      {
        "category": "general",
        "text": "The Cisco PSIRT is not aware of any public announcements or malicious use of the vulnerabilities that are described in this advisory.",
        "title": "Exploitation and Public Announcements"
      },
      {
        "category": "general",
        "text": "Cisco would like to thank Qian Chen of the Codesafe Team of Legendsec at Qi\u0027anxin Group for reporting these vulnerabilities.",
        "title": "Source"
      },
      {
        "category": "legal_disclaimer",
        "text": "THIS DOCUMENT IS PROVIDED ON AN \"AS IS\" BASIS AND DOES NOT IMPLY ANY KIND OF GUARANTEE OR WARRANTY, INCLUDING THE WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR USE. YOUR USE OF THE INFORMATION ON THE DOCUMENT OR MATERIALS LINKED FROM THE DOCUMENT IS AT YOUR OWN RISK. CISCO RESERVES THE RIGHT TO CHANGE OR UPDATE THIS DOCUMENT AT ANY TIME.\r\n\r\nA standalone copy or paraphrase of the text of this document that omits the distribution URL is an uncontrolled copy and may lack important information or contain factual errors. The information in this document is intended for end users of Cisco products.",
        "title": "Legal Disclaimer"
      }
    ],
    "publisher": {
      "category": "vendor",
      "contact_details": "Emergency Support:\r\n+1 877 228 7302 (toll-free within North America)\r\n+1 408 525 6532 (International direct-dial)\r\nNon-emergency Support:\r\nEmail: psirt@cisco.com\r\nSupport requests that are received via e-mail are typically acknowledged within 48 hours.",
      "issuing_authority": "Cisco product security incident response is the responsibility of the Cisco Product Security Incident Response Team (PSIRT). The Cisco PSIRT is a dedicated, global team that manages the receipt, investigation, and public reporting of security vulnerability information that is related to Cisco products and networks. The on-call Cisco PSIRT works 24x7 with Cisco customers, independent security researchers, consultants, industry organizations, and other vendors to identify possible security issues with Cisco products and networks.\r\nMore information can be found in Cisco Security Vulnerability Policy available at https://sec.cloudapps.cisco.com/security/center/resources/security_vulnerability_policy.html",
      "name": "Cisco",
      "namespace": "https://wwww.cisco.com"
    },
    "references": [
      {
        "category": "self",
        "summary": "Cisco Small Business 220 Series Smart Switches Link Layer Discovery Protocol Vulnerabilities",
        "url": "https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-sb220-lldp-multivuls-mVRUtQ8T"
      },
      {
        "category": "external",
        "summary": "Cisco Security Vulnerability Policy",
        "url": "https://sec.cloudapps.cisco.com/security/center/resources/security_vulnerability_policy.html"
      },
      {
        "category": "external",
        "summary": "https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-sb220-lldp-multivuls-mVRUtQ8T",
        "url": "https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-sb220-lldp-multivuls-mVRUtQ8T"
      },
      {
        "category": "external",
        "summary": "CSCvz29121",
        "url": "https://bst.cloudapps.cisco.com/bugsearch/bug/CSCvz29121"
      },
      {
        "category": "external",
        "summary": "CSCwa32673",
        "url": "https://bst.cloudapps.cisco.com/bugsearch/bug/CSCwa32673"
      },
      {
        "category": "external",
        "summary": "CSCvz29126",
        "url": "https://bst.cloudapps.cisco.com/bugsearch/bug/CSCvz29126"
      },
      {
        "category": "external",
        "summary": "CSCwa32708",
        "url": "https://bst.cloudapps.cisco.com/bugsearch/bug/CSCwa32708"
      },
      {
        "category": "external",
        "summary": "CSCvz29108,",
        "url": "https://bst.cloudapps.cisco.com/bugsearch/bug/CSCvz29108"
      },
      {
        "category": "external",
        "summary": "CSCwa32785",
        "url": "https://bst.cloudapps.cisco.com/bugsearch/bug/CSCwa32785"
      },
      {
        "category": "external",
        "summary": "CSCvz29116",
        "url": "https://bst.cloudapps.cisco.com/bugsearch/bug/CSCvz29116"
      },
      {
        "category": "external",
        "summary": "CSCwa32762",
        "url": "https://bst.cloudapps.cisco.com/bugsearch/bug/CSCwa32762"
      },
      {
        "category": "external",
        "summary": "CSCvz29120,",
        "url": "https://bst.cloudapps.cisco.com/bugsearch/bug/CSCvz29120"
      },
      {
        "category": "external",
        "summary": "CSCwa32793",
        "url": "https://bst.cloudapps.cisco.com/bugsearch/bug/CSCwa32793"
      },
      {
        "category": "external",
        "summary": "CSCvz29134",
        "url": "https://bst.cloudapps.cisco.com/bugsearch/bug/CSCvz29134"
      },
      {
        "category": "external",
        "summary": "CSCwa32782",
        "url": "https://bst.cloudapps.cisco.com/bugsearch/bug/CSCwa32782"
      },
      {
        "category": "external",
        "summary": "https://www.cisco.com/c/en/us/products/end-user-license-agreement.html",
        "url": "https://www.cisco.com/c/en/us/products/end-user-license-agreement.html"
      },
      {
        "category": "external",
        "summary": "considering software upgrades",
        "url": "https://sec.cloudapps.cisco.com/security/center/resources/security_vulnerability_policy.html#fixes"
      },
      {
        "category": "external",
        "summary": "Cisco\u0026nbsp;Security Advisories page",
        "url": "https://www.cisco.com/go/psirt"
      },
      {
        "category": "external",
        "summary": "https://www.cisco.com/c/en/us/support/web/tsd-cisco-worldwide-contacts.html",
        "url": "https://www.cisco.com/c/en/us/support/web/tsd-cisco-worldwide-contacts.html"
      },
      {
        "category": "external",
        "summary": "Software Center",
        "url": "https://software.cisco.com/download/navigator.html"
      },
      {
        "category": "external",
        "summary": "Security Vulnerability Policy",
        "url": "https://sec.cloudapps.cisco.com/security/center/resources/security_vulnerability_policy.html"
      }
    ],
    "title": "Cisco Small Business 220 Series Smart Switches Link Layer Discovery Protocol Vulnerabilities",
    "tracking": {
      "current_release_date": "2022-01-13T21:37:56+00:00",
      "generator": {
        "date": "2022-10-22T03:13:28+00:00",
        "engine": {
          "name": "TVCE"
        }
      },
      "id": "cisco-sa-sb220-lldp-multivuls-mVRUtQ8T",
      "initial_release_date": "2021-10-06T16:00:00+00:00",
      "revision_history": [
        {
          "date": "2021-10-06T15:52:36+00:00",
          "number": "1.0.0",
          "summary": "Initial public release."
        },
        {
          "date": "2021-12-06T15:31:48+00:00",
          "number": "1.1.0",
          "summary": "Updated vulnerable and fixed release information."
        },
        {
          "date": "2022-01-13T21:37:56+00:00",
          "number": "1.2.0",
          "summary": "Added bug IDs and updated vulnerable and fixed release  information."
        }
      ],
      "status": "final",
      "version": "1.2.0"
    }
  },
  "product_tree": {
    "branches": [
      {
        "branches": [
          {
            "category": "product_family",
            "name": "Cisco Small Business 200 Series Smart Switches",
            "product": {
              "name": "Cisco Small Business 200 Series Smart Switches ",
              "product_id": "CSAFPID-187434"
            }
          },
          {
            "category": "product_family",
            "name": "Cisco Small Business 220 Series Smart Plus Switches",
            "product": {
              "name": "Cisco Small Business 220 Series Smart Plus Switches ",
              "product_id": "CSAFPID-218878"
            }
          },
          {
            "category": "product_family",
            "name": "Cisco Small Business Smart and Managed Switches",
            "product": {
              "name": "Cisco Small Business Smart and Managed Switches ",
              "product_id": "CSAFPID-278027"
            }
          }
        ],
        "category": "vendor",
        "name": "Cisco"
      }
    ]
  },
  "vulnerabilities": [
    {
      "cve": "CVE-2021-34779",
      "ids": [
        {
          "system_name": "Cisco Bug ID",
          "text": "CSCvz29121"
        },
        {
          "system_name": "Cisco Bug ID",
          "text": "CSCwa32673"
        }
      ],
      "notes": [
        {
          "category": "other",
          "text": "Complete.",
          "title": "Affected Product Comprehensiveness"
        }
      ],
      "product_status": {
        "known_affected": [
          "CSAFPID-187434",
          "CSAFPID-278027"
        ]
      },
      "remediations": [
        {
          "category": "vendor_fix",
          "details": "Cisco has released software updates that address this vulnerability.",
          "product_ids": [
            "CSAFPID-278027",
            "CSAFPID-187434"
          ],
          "url": "https://software.cisco.com"
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "baseScore": 8.8,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.1"
          },
          "products": [
            "CSAFPID-187434",
            "CSAFPID-278027"
          ]
        }
      ],
      "title": "Cisco Small Business 220 Series Smart Switches Interger Underflow Vulnerability"
    },
    {
      "cve": "CVE-2021-34780",
      "ids": [
        {
          "system_name": "Cisco Bug ID",
          "text": "CSCvz29126"
        },
        {
          "system_name": "Cisco Bug ID",
          "text": "CSCwa32708"
        }
      ],
      "notes": [
        {
          "category": "other",
          "text": "Complete.",
          "title": "Affected Product Comprehensiveness"
        }
      ],
      "product_status": {
        "known_affected": [
          "CSAFPID-187434",
          "CSAFPID-278027"
        ]
      },
      "remediations": [
        {
          "category": "vendor_fix",
          "details": "Cisco has released software updates that address this vulnerability.",
          "product_ids": [
            "CSAFPID-278027",
            "CSAFPID-187434"
          ],
          "url": "https://software.cisco.com"
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "baseScore": 8.8,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.1"
          },
          "products": [
            "CSAFPID-187434",
            "CSAFPID-278027"
          ]
        }
      ],
      "title": "Cisco Small Business 220 Series Smart Switches Buffer Overflow Vulnerability"
    },
    {
      "cve": "CVE-2021-34778",
      "ids": [
        {
          "system_name": "Cisco Bug ID",
          "text": "CSCvz29134"
        },
        {
          "system_name": "Cisco Bug ID",
          "text": "CSCwa32782"
        }
      ],
      "notes": [
        {
          "category": "other",
          "text": "Complete.",
          "title": "Affected Product Comprehensiveness"
        }
      ],
      "product_status": {
        "known_affected": [
          "CSAFPID-187434",
          "CSAFPID-278027"
        ]
      },
      "remediations": [
        {
          "category": "vendor_fix",
          "details": "Cisco has released software updates that address this vulnerability.",
          "product_ids": [
            "CSAFPID-278027",
            "CSAFPID-187434"
          ],
          "url": "https://software.cisco.com"
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "baseScore": 4.3,
            "baseSeverity": "MEDIUM",
            "vectorString": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N",
            "version": "3.1"
          },
          "products": [
            "CSAFPID-187434",
            "CSAFPID-278027"
          ]
        }
      ],
      "title": "Cisco Small Business 220 Series Smart Switches Out-of-Bounds Read Vulnerability"
    },
    {
      "cve": "CVE-2021-34777",
      "ids": [
        {
          "system_name": "Cisco Bug ID",
          "text": "CSCvz29120"
        },
        {
          "system_name": "Cisco Bug ID",
          "text": "CSCwa32793"
        }
      ],
      "notes": [
        {
          "category": "other",
          "text": "Complete.",
          "title": "Affected Product Comprehensiveness"
        }
      ],
      "product_status": {
        "known_affected": [
          "CSAFPID-218878",
          "CSAFPID-278027"
        ]
      },
      "remediations": [
        {
          "category": "vendor_fix",
          "details": "Cisco has released software updates that address this vulnerability.",
          "product_ids": [
            "CSAFPID-278027",
            "CSAFPID-218878"
          ],
          "url": "https://software.cisco.com"
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "baseScore": 4.3,
            "baseSeverity": "MEDIUM",
            "vectorString": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N",
            "version": "3.1"
          },
          "products": [
            "CSAFPID-218878",
            "CSAFPID-278027"
          ]
        }
      ],
      "title": "Cisco Small Business 220 Series Smart Switches Out-of-Bounds Read Vulnerability"
    },
    {
      "cve": "CVE-2021-34776",
      "ids": [
        {
          "system_name": "Cisco Bug ID",
          "text": "CSCvz29116"
        },
        {
          "system_name": "Cisco Bug ID",
          "text": "CSCwa32762"
        }
      ],
      "notes": [
        {
          "category": "other",
          "text": "Complete.",
          "title": "Affected Product Comprehensiveness"
        }
      ],
      "product_status": {
        "known_affected": [
          "CSAFPID-218878",
          "CSAFPID-278027"
        ]
      },
      "remediations": [
        {
          "category": "vendor_fix",
          "details": "Cisco has released software updates that address this vulnerability.",
          "product_ids": [
            "CSAFPID-278027",
            "CSAFPID-218878"
          ],
          "url": "https://software.cisco.com"
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "baseScore": 4.3,
            "baseSeverity": "MEDIUM",
            "vectorString": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N",
            "version": "3.1"
          },
          "products": [
            "CSAFPID-218878",
            "CSAFPID-278027"
          ]
        }
      ],
      "title": "Cisco Small Business 220 Series Smart Switches Out-of-Bounds Read Vulnerability"
    },
    {
      "cve": "CVE-2021-34775",
      "ids": [
        {
          "system_name": "Cisco Bug ID",
          "text": "CSCvz29108"
        },
        {
          "system_name": "Cisco Bug ID",
          "text": "CSCwa32785"
        }
      ],
      "notes": [
        {
          "category": "other",
          "text": "Complete.",
          "title": "Affected Product Comprehensiveness"
        }
      ],
      "product_status": {
        "known_affected": [
          "CSAFPID-218878",
          "CSAFPID-278027"
        ]
      },
      "remediations": [
        {
          "category": "vendor_fix",
          "details": "Cisco has released software updates that address this vulnerability.",
          "product_ids": [
            "CSAFPID-278027",
            "CSAFPID-218878"
          ],
          "url": "https://software.cisco.com"
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "baseScore": 4.3,
            "baseSeverity": "MEDIUM",
            "vectorString": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N",
            "version": "3.1"
          },
          "products": [
            "CSAFPID-218878",
            "CSAFPID-278027"
          ]
        }
      ],
      "title": "Cisco Small Business 220 Series Smart Switches Out-of-Bounds Read Vulnerability"
    }
  ]
}


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