Critical Flaws Discovered in Cisco Small Business RV Series Routers
Vulnerabilities mentionedAll →
| CVE | Vulnerability | CVSS | EPSS | Flags | Affected | Exposure | Published |
|---|---|---|---|---|---|---|---|
| CVE-2022-20699 | Stack Buffer Overflow RCE in Cisco Small Business RV Series Routers CVE-2022-20699 is a stack-based buffer overflow (CWE-121, caused by improper input-size validation per CWE-1284) in Cisco Small Business RV160, RV260, RV340, and RV345 Series Routers, one of a set of related flaws fixed in the same Cisco advisory. It can be triggered remotely without authentication by sending crafted requests to the router's network-facing services; the available public PoC demonstrates unauthenticated remote code execution against the RV340 via its SSL VPN interface. A successful attacker can execute arbitrary code or commands, elevate privileges, bypass authentication and authorization protections, install unsigned software, or crash the device (denial of service). Any organization running these small-business routers is affected, with the highest risk for devices whose web management or SSL VPN interface is reachable from the internet. The flaw is confirmed to be exploited in the wild: CISA added it to the Known Exploited Vulnerabilities catalog on 2022-03-03, EPSS estimates a 72.5% probability of exploitation within 30 days, and at least one public proof-of-concept is available. Do: Upgrade all RV160, RV260, RV340/340W and RV345/345P routers to the fixed firmware released in Cisco's advisory, applying updates per vendor instructions as required by the CISA KEV entry. Until patched, limit exposure by restricting web management and SSL VPN to trusted source addresses or disabling SSL VPN where it is not needed. Because active exploitation and a public unauthenticated RCE PoC exist, prioritize internet-facing devices and check them for signs of compromise. | 9.8 group max | 72% | KEV PoC |
| largetens of thousands of internet-exposed routers (order of ~10^4 devices) | |
| CVE-2022-20705 | Multiple vulnerabilities in Cisco Small Business RV160, RV260, RV340, and RV345 Series Routers could allow an attacker to do any of the following: Multiple vulnerabilities in Cisco Small Business RV160, RV260, RV340, and RV345 Series Routers could allow an attacker to do any of the following: Execute arbitrary code Elevate privileges Execute arbitrary commands Bypass authentication and authorization protections Fetch and run unsigned software Cause denial of service (DoS) For more information about these vulnerabilities, see the Details section of this advisory. NVD description · AI analysis pending | 9.8 group max | 80% |
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Full article478 words · extracted from thehackernews.com · click to collapse
Ravie LakshmananFeb 03, 2022
Cisco has patched multiple critical security vulnerabilities impacting its RV Series routers that could be weaponized to elevate privileges and execute arbitrary code on affected systems, while also warning of the existence of proof-of-concept (PoC) exploit code targeting some of these bugs.
Three of the 15 flaws, tracked as CVE-2022-20699, CVE-2022-20700, and CVE-2022-20707, carry the highest CVSS rating of 10.0, and affect its Small Business RV160, RV260, RV340, and RV345 Series routers.
Additionally, the flaws could be exploited to bypass authentication and authorization protections, retrieve and run unsigned software, and even cause denial-of-service (DoS) conditions.
The networking equipment maker acknowledged that it's "aware that proof-of-concept exploit code is available for several of the vulnerabilities" but didn't share any further specifics on the nature of the exploit or the identity of the threat actors that may be exploiting them.
CVE-2022-20699 concerns a case of remote code execution that could be exploited by an attacker by sending specially crafted HTTP requests to a device that functions as an SSL VPN Gateway, effectively leading to the execution of malicious code with root privileges.
CVE-2022-20700, CVE-2022-20701 (CVSS score: 9.0), and CVE-2022-20702 (CVSS score: 6.0), which the company said stems from an insufficient authorization enforcement mechanism, could be abused to elevate privileges to root and execute arbitrary commands on the affected system.
CVE-2022-20708, the third flaw to receive a 10.0 score on the CVSS scale, is due to insufficient validation of user-supplied input, enabling the adversary to inject malicious commands and get them on the underlying Linux operating system.
Other flaws fixed by Cisco are as follows:
- CVE-2022-20703 (CVSS score: 9.3) – Cisco Small Business RV Series Routers Digital Signature Verification Bypass Vulnerability
- CVE-2022-20704 (CVSS score: 4.8) – Cisco Small Business RV Series Routers SSL Certificate Validation Vulnerability
- CVE-2022-20705 (CVSS score: 5.3) – Cisco Small Business RV Series Routers Improper Session Management Vulnerability
- CVE-2022-20706 (CVSS score: 8.3) – Cisco RV Series Routers Open Plug and Play Command Injection Vulnerability
- CVE-2022-20707 and CVE-2022-20749 (CVSS scores: 7.3) – Cisco RV340, RV340W, RV345, and RV345P Dual WAN Gigabit VPN Routers Command Injection Vulnerabilities
- CVE-2022-20709 (CVSS score: 5.3) – Cisco RV340, RV340W, RV345, and RV345P Dual WAN Gigabit VPN Routers Arbitrary File Upload Vulnerability
- CVE-2022-20710 (CVSS score: 5.3) – Cisco Small Business RV Series Routers GUI Denial of Service Vulnerability
- CVE-2022-20711 (CVSS score: 8.2) – Cisco RV340, RV340W, RV345, and RV345P Dual WAN Gigabit VPN Routers Arbitrary File Overwrite Vulnerability
- CVE-2022-20712 (CVSS score: 7.3) – Cisco Small Business RV Series Routers Upload Module Remote Code Execution Vulnerability
Cisco also stressed that there are no workarounds that address these aforementioned weaknesses, urging customers to update to the latest version of the software as soon as possible to counter any potential attacks.
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Text extracted automatically; images, tables and formatting may be missing. Original: https://thehackernews.com/2022/02/critical-flaws-discovered-in-cisco.html