Vulnerability Details : CVE-2021-1309
Multiple vulnerabilities exist in the Link Layer Discovery Protocol (LLDP) implementation for Cisco Small Business RV Series Routers. An unauthenticated, adjacent attacker could execute arbitrary code or cause an affected router to leak system memory or reload. A memory leak or device reload would cause a denial of service (DoS) condition on an affected device. For more information about these vulnerabilities, see the 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).
Vulnerability category: OverflowExecute codeDenial of service
Products affected by CVE-2021-1309
- cpe:2.3:o:cisco:rv132w_firmware:1.0.1.14:*:*:*:*:*:*:*
- cpe:2.3:o:cisco:rv132w_firmware:1.0.0.14:*:*:*:*:*:*:*
- cpe:2.3:o:cisco:rv132w_firmware:1.0.1.20:*:*:*:*:*:*:*
- cpe:2.3:o:cisco:rv134w_firmware:1.0.1.14:*:*:*:*:*:*:*
- cpe:2.3:o:cisco:rv134w_firmware:1.0.0.14:*:*:*:*:*:*:*
- cpe:2.3:o:cisco:rv134w_firmware:1.0.1.20:*:*:*:*:*:*:*
- cpe:2.3:o:cisco:rv340_firmware:1.0.1.14:*:*:*:*:*:*:*
- cpe:2.3:o:cisco:rv340_firmware:1.0.0.14:*:*:*:*:*:*:*
- cpe:2.3:o:cisco:rv340_firmware:1.0.1.20:*:*:*:*:*:*:*
- cpe:2.3:o:cisco:rv340w_firmware:1.0.1.14:*:*:*:*:*:*:*
- cpe:2.3:o:cisco:rv340w_firmware:1.0.0.14:*:*:*:*:*:*:*
- cpe:2.3:o:cisco:rv340w_firmware:1.0.1.20:*:*:*:*:*:*:*
- cpe:2.3:o:cisco:rv345_firmware:1.0.1.14:*:*:*:*:*:*:*
- cpe:2.3:o:cisco:rv345_firmware:1.0.0.14:*:*:*:*:*:*:*
- cpe:2.3:o:cisco:rv345_firmware:1.0.1.20:*:*:*:*:*:*:*
- cpe:2.3:o:cisco:rv345p_firmware:1.0.1.14:*:*:*:*:*:*:*
- cpe:2.3:o:cisco:rv345p_firmware:1.0.0.14:*:*:*:*:*:*:*
- cpe:2.3:o:cisco:rv345p_firmware:1.0.1.20:*:*:*:*:*:*:*
- cpe:2.3:o:cisco:rv160_firmware:1.0.1.14:*:*:*:*:*:*:*
- cpe:2.3:o:cisco:rv160_firmware:1.0.0.14:*:*:*:*:*:*:*
- cpe:2.3:o:cisco:rv160_firmware:1.0.1.20:*:*:*:*:*:*:*
- cpe:2.3:o:cisco:rv160w_firmware:1.0.1.14:*:*:*:*:*:*:*
- cpe:2.3:o:cisco:rv160w_firmware:1.0.0.14:*:*:*:*:*:*:*
- cpe:2.3:o:cisco:rv160w_firmware:1.0.1.20:*:*:*:*:*:*:*
- cpe:2.3:o:cisco:rv260_firmware:1.0.1.14:*:*:*:*:*:*:*
- cpe:2.3:o:cisco:rv260_firmware:1.0.0.14:*:*:*:*:*:*:*
- cpe:2.3:o:cisco:rv260_firmware:1.0.1.20:*:*:*:*:*:*:*
- cpe:2.3:o:cisco:rv260p_firmware:1.0.1.14:*:*:*:*:*:*:*
- cpe:2.3:o:cisco:rv260p_firmware:1.0.0.14:*:*:*:*:*:*:*
- cpe:2.3:o:cisco:rv260p_firmware:1.0.1.20:*:*:*:*:*:*:*
- cpe:2.3:o:cisco:rv260w_firmware:1.0.1.14:*:*:*:*:*:*:*
- cpe:2.3:o:cisco:rv260w_firmware:1.0.0.14:*:*:*:*:*:*:*
- cpe:2.3:o:cisco:rv260w_firmware:1.0.1.20:*:*:*:*:*:*:*
Exploit prediction scoring system (EPSS) score for CVE-2021-1309
0.20%
Probability of exploitation activity in the next 30 days
EPSS Score History
~ 39 %
Percentile, the proportion of vulnerabilities that are scored at or less
CVSS scores for CVE-2021-1309
| Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source | First Seen |
|---|---|---|---|---|---|---|
|
8.3
|
HIGH | AV:A/AC:L/Au:N/C:C/I:C/A:C |
6.5
|
10.0
|
NIST | |
|
7.4
|
HIGH | CVSS:3.0/AV:A/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H |
2.8
|
4.0
|
Cisco Systems, Inc. | |
|
8.8
|
HIGH | CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
2.8
|
5.9
|
NIST |
CWE ids for CVE-2021-1309
-
The product performs operations on a memory buffer, but it reads from or writes to a memory location outside the buffer's intended boundary. This may result in read or write operations on unexpected memory locations that could be linked to other variables, data structures, or internal program data.Assigned by: ykramarz@cisco.com (Secondary)
-
The product does not sufficiently track and release allocated memory after it has been used, making the memory unavailable for reallocation and reuse.Assigned by: nvd@nist.gov (Primary)
References for CVE-2021-1309
-
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-rv-multi-lldp-u7e4chCe
Cisco Small Business RV Series Routers Link Layer Discovery Protocol VulnerabilitiesVendor Advisory
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