Multiple vulnerabilities in Cisco Small Business RV Series Routers

Published: 2019-11-08 | Updated: 2019-11-08
Severity High
Patch available YES
Number of vulnerabilities 2
CVE ID CVE-2019-15271
CVE-2019-15957
CWE ID CWE-502
CWE-20
Exploitation vector Network
Public exploit N/A
Vulnerable software Cisco RV016 Multi-WAN VPN Router Subscribe
Cisco RV042 Dual WAN VPN Router
Cisco RV042G Dual Gigabit WAN VPN Router
Cisco RV082 Dual WAN VPN Router
Small Business RV320 Dual Gigabit WAN VPN Router
Small Business RV325 Dual Gigabit WAN VPN Router
Vendor Cisco Systems, Inc

Security Advisory

1) Deserialization of Untrusted Data

Severity: High

CVSSv3: 7.7 [CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C] [PCI]

CVE-ID: CVE-2019-15271

CWE-ID: CWE-502 - Deserialization of Untrusted Data

Description

The vulnerability allows a remote attacker to execute arbitrary code on the target system.

The vulnerability exists due to insecure input validation when processing serialized data in the web-based management interface. A remote authenticated attacker can send a specially crafted HTTP request to the targeted device and execute arbitrary code on the target system.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Cisco RV016 Multi-WAN VPN Router: 3.0.0.1-tm, 3.0.0.19-tm, 3.0.2.01-tm, 4.1.0.02-tm, 4.1.1.01, 4.2.1.02, 4.2.2.03, 4.2.3.06, 4.2.3.07, 4.2.3.08, 4.2.3.09

Cisco RV042 Dual WAN VPN Router: 4.1.0.02-tm, 4.1.1.01, 4.2.1.02, 4.2.2.08, 4.2.3.03, 4.2.3.06, 4.2.3.07, 4.2.3.08, 4.2.3.09

Cisco RV042G Dual Gigabit WAN VPN Router: 4.2.1.02, 4.2.3.03, 4.2.3.06, 4.2.3.07, 4.2.3.08, 4.2.3.09, 4.2.8.08

Cisco RV082 Dual WAN VPN Router: 1.3.9.8-tm, 2.0.2.01-tm, 4.1.0.02-tm, 4.1.1.01, 4.2.1.02, 4.2.2.08, 4.2.3.03, 4.2.3.06, 4.2.3.07, 4.2.3.08, 4.2.3.09

CPE External links

https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20191106-sbrv-cmd-x

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated user via the Internet.

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) Input validation error

Severity: Medium

CVSSv3: 6.3 [CVSS:3.0/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C] [PCI]

CVE-ID: CVE-2019-15957

CWE-ID: CWE-20 - Improper Input Validation

Description

The vulnerability allows a remote attacker to inject arbitrary commands on the target system.

The vulnerability exists due to insufficient validation of user-supplied input in the web-based management interface. A remote authenticated administrator can provide malicious input to a specific field in the web-based management interface of an affected device and execute arbitrary commands on the underlying Linux operating system.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Cisco RV016 Multi-WAN VPN Router: 3.0.0.1-tm, 3.0.0.19-tm, 3.0.2.01-tm, 4.1.0.02-tm, 4.1.1.01, 4.2.1.02, 4.2.2.03, 4.2.3.06, 4.2.3.07, 4.2.3.08, 4.2.3.09

Cisco RV042 Dual WAN VPN Router: 4.1.0.02-tm, 4.1.1.01, 4.2.1.02, 4.2.2.08, 4.2.3.03, 4.2.3.06, 4.2.3.07, 4.2.3.08, 4.2.3.09

Cisco RV042G Dual Gigabit WAN VPN Router: 4.2.1.02, 4.2.3.03, 4.2.3.06, 4.2.3.07, 4.2.3.08, 4.2.3.09, 4.2.8.08

Cisco RV082 Dual WAN VPN Router: 1.3.9.8-tm, 2.0.2.01-tm, 4.1.0.02-tm, 4.1.1.01, 4.2.1.02, 4.2.2.08, 4.2.3.03, 4.2.3.06, 4.2.3.07, 4.2.3.08, 4.2.3.09

Small Business RV320 Dual Gigabit WAN VPN Router: 1.4.2.22

Small Business RV325 Dual Gigabit WAN VPN Router: 1.3.1.12, 1.3.2.02, 1.4.2.15, 1.4.2.16, 1.4.2.17, 1.4.2.18, 1.4.2.19, 1.4.2.20, 1.4.2.22

CPE External links

https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20191106-sbr-cominj

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated privileged user via the Internet.

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.