Multiple vulnerabilities in Cisco Small Business RV Series Routers
| Risk | Medium |
| Patch available | YES |
| Number of vulnerabilities | 3 |
| CVE-ID | CVE-2021-1251 CVE-2021-1308 CVE-2021-1309 |
| CWE-ID | CWE-401 CWE-400 CWE-119 |
| Exploitation vector | Local network |
| Public exploit | N/A |
| Vulnerable software Subscribe |
RV132W ADSL2+ Wireless-N VPN Router Hardware solutions / Routers & switches, VoIP, GSM, etc RV134W VDSL2 Wireless-AC VPN Router Hardware solutions / Routers & switches, VoIP, GSM, etc Cisco Small Business RV160 Series VPN Router Hardware solutions / Routers & switches, VoIP, GSM, etc Cisco Small Business RV160W Wireless-AC VPN Router Hardware solutions / Routers & switches, VoIP, GSM, etc Cisco Small Business RV260 VPN Router Hardware solutions / Routers & switches, VoIP, GSM, etc Cisco Small Business RV260P VPN Router with POE Hardware solutions / Routers & switches, VoIP, GSM, etc Cisco Small Business RV260W Wireless-AC VPN Router Hardware solutions / Routers & switches, VoIP, GSM, etc Cisco RV340 Dual WAN Gigabit VPN Router Hardware solutions / Routers & switches, VoIP, GSM, etc Cisco RV340W Dual WAN Gigabit Wireless-AC VPN Router Hardware solutions / Routers & switches, VoIP, GSM, etc Cisco RV345 Dual WAN Gigabit VPN Router Hardware solutions / Routers & switches, VoIP, GSM, etc Cisco RV345P Dual WAN Gigabit VPN Router Hardware solutions / Routers & switches, VoIP, GSM, etc |
| Vendor | Cisco Systems, Inc |
Security Bulletin
This security bulletin contains information about 3 vulnerabilities.
1) Memory leak
EUVDB-ID: #VU51990
Risk: Low
CVSSv3.1: 6.4 [CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H/E:U/RL:O/RC:C]
CVE-ID: CVE-2021-1251
CWE-ID:
CWE-401 - Missing release of memory after effective lifetime
Exploit availability: No
DescriptionThe vulnerability allows a remote attacker to perform DoS attack on the target system.
The vulnerability exists due to missing length validation of certain LLDP packet header fields. A remote attacker on the local network can send a specially crafted LLDP packet and perform denial of service attack.
MitigationInstall updates from vendor's website.
Vulnerable software versionsRV132W ADSL2+ Wireless-N VPN Router: 1.0.1.14
RV134W VDSL2 Wireless-AC VPN Router: before 1.0.1.21
Cisco Small Business RV160 Series VPN Router: before 1.0.01.03
Cisco Small Business RV160W Wireless-AC VPN Router: before 1.0.01.03
Cisco Small Business RV260 VPN Router: before 1.0.01.03
Cisco Small Business RV260P VPN Router with POE: before 1.0.01.03
Cisco Small Business RV260W Wireless-AC VPN Router: before 1.0.01.03
Cisco RV340 Dual WAN Gigabit VPN Router: before 1.0.03.21
Cisco RV340W Dual WAN Gigabit Wireless-AC VPN Router: before 1.0.03.21
Cisco RV345 Dual WAN Gigabit VPN Router: before 1.0.03.21
Cisco RV345P Dual WAN Gigabit VPN Router: before 1.0.03.21
External linkshttp://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-rv-multi-lldp-u7e4chCe
Q & A
Can this vulnerability be exploited remotely?
Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the local network (LAN).
How the attacker can exploit this vulnerability?
The attacker would have to send a specially crafted request to the affected device in order to exploit this vulnerability.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability.
2) Resource exhaustion
EUVDB-ID: #VU51991
Risk: Low
CVSSv3.1: 6.4 [CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H/E:U/RL:O/RC:C]
CVE-ID: CVE-2021-1308
CWE-ID:
CWE-400 - Resource exhaustion
Exploit availability: No
DescriptionThe vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to missing length validation of certain LLDP packet header fields. A remote attacker on the local network can trigger resource exhaustion and perform a denial of service (DoS) attack.
MitigationInstall updates from vendor's website.
Vulnerable software versionsRV132W ADSL2+ Wireless-N VPN Router: 1.0.1.14
RV134W VDSL2 Wireless-AC VPN Router: before 1.0.1.21
Cisco Small Business RV160 Series VPN Router: before 1.0.01.03
Cisco Small Business RV160W Wireless-AC VPN Router: before 1.0.01.03
Cisco Small Business RV260 VPN Router: before 1.0.01.03
Cisco Small Business RV260P VPN Router with POE: before 1.0.01.03
Cisco Small Business RV260W Wireless-AC VPN Router: before 1.0.01.03
Cisco RV340 Dual WAN Gigabit VPN Router: before 1.0.03.21
Cisco RV340W Dual WAN Gigabit Wireless-AC VPN Router: before 1.0.03.21
Cisco RV345 Dual WAN Gigabit VPN Router: before 1.0.03.21
Cisco RV345P Dual WAN Gigabit VPN Router: before 1.0.03.21
External linkshttp://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-rv-multi-lldp-u7e4chCe
Q & A
Can this vulnerability be exploited remotely?
Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the local network (LAN).
How the attacker can exploit this vulnerability?
The attacker would have to send a specially crafted request to the affected device in order to exploit this vulnerability.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability.
3) Buffer overflow
EUVDB-ID: #VU51992
Risk: Medium
CVSSv3.1: 7.7 [CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]
CVE-ID: CVE-2021-1309
CWE-ID:
CWE-119 - Memory corruption
Exploit availability: No
DescriptionThe vulnerability allows a remote attacker to execute arbitrary code on the target system.
The vulnerability exists due to a boundary error in the LLDP implementation. A remote attacker on the local network can trigger memory corruption and execute arbitrary code on the target system.
Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.
MitigationInstall updates from vendor's website.
Vulnerable software versionsRV132W ADSL2+ Wireless-N VPN Router: 1.0.1.14
RV134W VDSL2 Wireless-AC VPN Router: before 1.0.1.21
Cisco Small Business RV160 Series VPN Router: before 1.0.01.03
Cisco Small Business RV160W Wireless-AC VPN Router: before 1.0.01.03
Cisco Small Business RV260 VPN Router: before 1.0.01.03
Cisco Small Business RV260P VPN Router with POE: before 1.0.01.03
Cisco Small Business RV260W Wireless-AC VPN Router: before 1.0.01.03
Cisco RV340 Dual WAN Gigabit VPN Router: before 1.0.03.21
Cisco RV340W Dual WAN Gigabit Wireless-AC VPN Router: before 1.0.03.21
Cisco RV345 Dual WAN Gigabit VPN Router: before 1.0.03.21
Cisco RV345P Dual WAN Gigabit VPN Router: before 1.0.03.21
External linkshttp://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-rv-multi-lldp-u7e4chCe
Q & A
Can this vulnerability be exploited remotely?
Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the local network (LAN).
How the attacker can exploit this vulnerability?
The attacker would have to send a specially crafted request to the affected device in order to exploit this vulnerability.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability.
