==================================================================== CERT-Renater Note d'Information No. 2021/VULN032 _____________________________________________________________________ DATE : 19/01/2021 HARDWARE PLATFORM(S): Cisco Small Business RV110W, RV130, RV130W, RV215W Routers. OPERATING SYSTEM(S): Cisco Small Business RV110W, RV130, RV130W, RV215W Routers'csoftware. ===================================================================== https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-rv-overflow-WUnUgv4U _____________________________________________________________________ Cisco Small Business RV110W, RV130, RV130W, and RV215W Routers Remote Command Execution and Denial of Service Vulnerabilities Critical Advisory ID: cisco-sa-rv-overflow-WUnUgv4U First Published: 2021 January 13 16:00 GMT Last Updated: 2021 January 19 16:21 GMT Version 2.0: Final Workarounds: No workarounds available Cisco Bug IDs: CSCvv65098 CSCvv69398 CSCvv71463 More... CVSS Score: Base 9.8 CVE-2021-1159 CVE-2021-1160 CVE-2021-1161 More... CWE-121 Summary Multiple vulnerabilities in the Universal Plug and Play (UPnP) service and the web-based management interface of Cisco Small Business RV110W, RV130, RV130W, and RV215W Routers could allow a remote attacker to execute arbitrary code or cause an affected device to restart unexpectedly. For more information about these vulnerabilities, see the Details section of this advisory. Cisco has not released software updates that address these vulnerabilities. There are no workarounds that address these vulnerabilities. This advisory is available at the following link: https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-rv-overflow-WUnUgv4U Affected Products Vulnerable Products These vulnerabilities affect the following Cisco Small Business routers: RV110W Wireless-N VPN Firewall RV130 VPN Router RV130W Wireless-N Multifunction VPN Router RV215W Wireless-N VPN Router The web-based management interface of these devices is available through a local LAN connection, which cannot be disabled, or through the WAN connection if the remote management feature is enabled. By default, the remote management feature is disabled for these devices. Determine the Device Configuration To determine whether the remote management feature is enabled for a device, open the web-based management interface and choose Basic Settings > Remote Management. If the Enable box is checked, remote management is enabled for the device. Products Confirmed Not Vulnerable Only products listed in the Vulnerable Products 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. Cisco Small Business RV110W, RV130, RV130W, and RV215W Routers UPnP Remote Command Execution and Denial of Service Vulnerability A vulnerability in the Universal Plug and Play (UPnP) service of Cisco Small Business RV110W, RV130, RV130W, and RV215W Routers could allow an unauthenticated, remote attacker to execute arbitrary code or cause an affected device to restart unexpectedly. The vulnerability is due to improper validation of incoming UPnP traffic. An attacker could exploit this vulnerability by sending a crafted UPnP request to an affected device. A successful exploit could allow the attacker to execute arbitrary code as the root user on the underlying operating system or cause the device to reload, resulting in a denial of service (DoS) condition. Cisco has not released software updates that address this vulnerability. There are no workarounds that address this vulnerability. Bug ID(s): CSCvv79107, CSCvv79109, and CSCvv79110 CVE ID: CVE-2021-1164 Security Impact Rating (SIR): Critical CVSS Base Score: 9.8 CVSS Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H Cisco Small Business RV110W, RV130, RV130W, and RV215W Routers Management Interface Remote Command Execution and Denial of Service Vulnerabilities Multiple vulnerabilities in the web-based management interface of Cisco Small Business RV110W, RV130, RV130W, and RV215W Routers could allow an authenticated, remote attacker with valid administrator credentials to execute arbitrary code or cause an affected device to restart unexpectedly. The vulnerabilities are due to improper validation of user-supplied input in the web-based management interface. An attacker could exploit these vulnerabilities by sending crafted HTTP requests to an affected device. A successful exploit could allow the attacker to execute arbitrary code as the root user on the underlying operating system or cause the device to reload, resulting in a denial of service (DoS) condition. To exploit these vulnerabilities, an attacker would need to have valid administrator credentials on the affected device. Cisco has not released software updates that address these vulnerabilities. There are no workarounds that address these vulnerabilities. Bug ID(s): CSCvv96742, CSCvv96741, CSCvv96738, CSCvv96733, CSCvv96732, CSCvv96729, CSCvv96730, CSCvw10473, CSCvw10487, CSCvw10484, CSCvw04678, CSCvw04779, CSCvw04781, CSCvv96765, CSCvv96767, CSCvv96764, CSCvv96756, CSCvv96755, CSCvv96751, CSCvv96748, CSCvv96747, CSCvv96772, CSCvv96771, CSCvv96768, CSCvv96763, CSCvv96762, CSCvv96761, CSCvv96757, CSCvv96820, CSCvv96758, CSCvv96759, CSCvv96812, CSCvv96814, CSCvv96811, CSCvv96810, CSCvv96809, CSCvv96806, CSCvv96799, CSCvv96800, CSCvv96801, CSCvv96807, CSCvw06978, CSCvw06865, CSCvw06971, CSCvw06860, CSCvw06967, CSCvw06852, CSCvw06962, CSCvw06846, CSCvw06841, CSCvw06961, CSCvw06832, CSCvw06958, CSCvv96817, CSCvv96818, CSCvw06813, CSCvw06902, CSCvw06828, CSCvw06950, CSCvv71466, CSCvv71463, CSCvv69398, CSCvw49030, CSCvw49036, CSCvw49034, CSCvv71467, CSCvv71468, CSCvv65098, CSCvw07002, CSCvw06900, CSCvw06998, CSCvw06894, CSCvw06993, CSCvw06882, CSCvw06868, CSCvw06981, CSCvw06873, CSCvw06982, CSCvw06987, CSCvw06874, CSCvw06879, CSCvw06991, CSCvw06880, CSCvw06992, CSCvw76488, and CSCvw91642 CVE ID(s): CVE-2021-1209, CVE-2021-1207, CVE-2021-1167, CVE-2021-1208, CVE-2021-1360, CVE-2021-1168, CVE-2021-1204, CVE-2021-1173, CVE-2021-1187, CVE-2021-1161, CVE-2021-1198, CVE-2021-1182, CVE-2021-1211, CVE-2021-1163, CVE-2021-1171, CVE-2021-1188, CVE-2021-1189, CVE-2021-1159, CVE-2021-1192, CVE-2021-1184, CVE-2021-1216, CVE-2021-1177, CVE-2021-1210, CVE-2021-1170, CVE-2021-1174, CVE-2021-1200, CVE-2021-1195, CVE-2021-1215, CVE-2021-1205, CVE-2021-1201, CVE-2021-1196, CVE-2021-1175, CVE-2021-1179, CVE-2021-1191, CVE-2021-1169, CVE-2021-1307, CVE-2021-1212, CVE-2021-1180, CVE-2021-1190, CVE-2021-1185, CVE-2021-1176, CVE-2021-1172, CVE-2021-1183, CVE-2021-1166, CVE-2021-1194, CVE-2021-1203, CVE-2021-1206, CVE-2021-1178, CVE-2021-1214, CVE-2021-1217, CVE-2021-1186, CVE-2021-1165, CVE-2021-1197, CVE-2021-1160, CVE-2021-1181, CVE-2021-1162, CVE-2021-1199, CVE-2021-1213, CVE-2021-1193, and CVE-2021-1202 Security Impact Rating (SIR): High CVSS Base Score: 7.2 CVSS Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H Workarounds There are no workarounds that address these vulnerabilities. Fixed Software Cisco has not released and will not release software updates to address the vulnerabilities described in this advisory. The Cisco Small Business RV110W, RV130, RV130W, and RV215W Routers have entered the end- of-life process. Customers are advised to refer to the end-of-life notices for these products: End-of-Sale and End-of-Life Announcement for the Cisco Small Business RV Series Routers (selected models) Customers are encouraged to migrate to the Cisco Small Business RV132W, RV160, or RV160W Routers. When considering a device migration, customers are advised to regularly consult the advisories for Cisco products, which are available from the Cisco Security Advisories and Alerts page, to determine exposure and a complete upgrade solution. In all cases, customers should ensure that new device will be sufficient for their network needs; new devices contain sufficient memory, and current hardware and software configurations will continue to be supported properly by the new product. If the information is not clear, customers are advised to contact the Cisco Technical Assistance Center (TAC) or their contracted maintenance providers. Exploitation and Public Announcements The Cisco Product Security Incident Response Team (PSIRT) is not aware of any public announcements or malicious use of the vulnerabilities described in this advisory. Source Cisco would like to thank the following people for reporting these vulnerabilities: ADLab of Venustech: CVE-2021-1168, CVE-2021-1197, CVE-2021-1198, CVE-2021-1199, CVE-2021-1200, CVE-2021-1201, CVE-2021-1202, CVE-2021-1205, CVE-2021-1206, CVE-2021-1210, CVE-2021-1211, CVE-2021-1212, CVE-2021-1213, CVE-2021-1214, CVE-2021-1215, CVE-2021-1216, and CVE-2021-1217 Kai Cheng of the Institute of Information Engineering, Chinese Academy of Sciences: CVE-2021-1159, CVE-2021-1160, CVE-2021-1161, CVE-2021-1162, CVE-2021-1163, CVE-2021-1165, CVE-2021-1166, CVE-2021-1169, CVE-2021-1170, CVE-2021-1171, CVE-2021-1172, CVE-2021-1173, CVE-2021-1174, CVE-2021-1175, CVE-2021-1176, CVE-2021-1177, CVE-2021-1178, CVE-2021-1179, CVE-2021-1180, CVE-2021-1181, CVE-2021-1182, CVE-2021-1183, CVE-2021-1184, CVE-2021-1185, CVE-2021-1186, CVE-2021-1187, CVE-2021-1188, CVE-2021-1189, CVE-2021-1190, CVE-2021-1191, CVE-2021-1192, CVE-2021-1193, CVE-2021-1194, CVE-2021-1195, CVE-2021-1196, CVE-2021-1203, and CVE-2021-1204 Shizhi He of Wuhan University: CVE-2021-1167 and CVE-2021-1208 Simp1e of 1AQ Team: CVE-2021-1207, CVE-2021-1209, and CVE-2021-1307 Swings of Chaitin Security Research Lab: CVE-2021-1207, CVE-2021-1209, CVE-2021-1164, and CVE-2021-1307 Treck Zhou and Ares. Pan: CVE-2021-1164 and CVE-2021-1360 URL https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-rv-overflow-WUnUgv4U Revision History Version Description Section Status Date 2.0 Changed advisory SIR from High to Critical. Updated the advisory title. Added a Details section. Changed the description and updated the CVSS score and SIR for CVE-2021-1164. Title, Header (SIR and CVSS score), Summary, and Details Final 2021-JAN-19 1.1 Updated external researcher information. Source Final 2021-JAN-14 1.0 Initial public release. — Final 2021-JAN-13 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. ========================================================= + CERT-RENATER | tel : 01-53-94-20-44 + + 23/25 Rue Daviel | fax : 01-53-94-20-41 + + 75013 Paris | email:cert@support.renater.fr + =========================================================