Vulnerability Details : CVE-2023-20047
A vulnerability in the Link Layer Discovery Protocol (LLDP) feature of Cisco Webex Room Phone and Cisco Webex Share devices could allow an unauthenticated, adjacent attacker to cause a denial of service (DoS) condition on an affected device.
This vulnerability is due to insufficient resource allocation. An attacker could exploit this vulnerability by sending crafted LLDP traffic to an affected device. A successful exploit could allow the attacker to exhaust the memory resources of the affected device, resulting in a crash of the LLDP process. If the affected device is configured to support LLDP only, this could cause an interruption to inbound and outbound calling. By default, these devices are configured to support both Cisco Discovery Protocol and LLDP. To recover operational state, the affected device needs a manual restart.
Vulnerability category: Denial of service
Products affected by CVE-2023-20047
- cpe:2.3:o:cisco:webex_room_phone_firmware:*:*:*:*:*:*:*:*
- cpe:2.3:o:cisco:webex_share_firmware:*:*:*:*:*:*:*:*
- cpe:2.3:a:cisco:sip_ip_phone_software:*:*:*:*:*:*:*:*
Exploit prediction scoring system (EPSS) score for CVE-2023-20047
0.05%
Probability of exploitation activity in the next 30 days
EPSS Score History
~ 20 %
Percentile, the proportion of vulnerabilities that are scored at or less
CVSS scores for CVE-2023-20047
| Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source | First Seen |
|---|---|---|---|---|---|---|
|
6.5
|
MEDIUM | CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
2.8
|
3.6
|
NIST | |
|
6.5
|
MEDIUM | CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
2.8
|
3.6
|
Cisco Systems, Inc. |
CWE ids for CVE-2023-20047
-
The product does not properly control the allocation and maintenance of a limited resource, thereby enabling an actor to influence the amount of resources consumed, eventually leading to the exhaustion of available resources.Assigned by: ykramarz@cisco.com (Secondary)
-
The product allocates a reusable resource or group of resources on behalf of an actor without imposing any restrictions on the size or number of resources that can be allocated, in violation of the intended security policy for that actor.Assigned by: nvd@nist.gov (Primary)
References for CVE-2023-20047
-
https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-lldp-memlk-McOecPT
Cisco Webex Room Phone and Cisco Webex Share Link Layer Discovery Protocol Memory Leak VulnerabilityVendor Advisory
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