CISA Adds Another 95 Flaws to its Actively Exploited Vulnerabilities Catalog
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) |
Full article370 words · extracted from thehackernews.com · click to collapse
Ravie LakshmananMar 05, 2022
The U.S. Cybersecurity and Infrastructure Security Agency (CISA) this week added 95 more security flaws to its Known Exploited Vulnerabilities Catalog, taking the total number of actively exploited vulnerabilities to 478.
"These types of vulnerabilities are a frequent attack vector for malicious cyber actors and pose significant risk to the federal enterprise," the agency said in an advisory published on March 3, 2022.
Of the 95 newly added bugs, 38 relate to Cisco vulnerabilities, 27 for Microsoft, 16 for Adobe, seven impact Oracle, and one each corresponding to Apache Tomcat, ChakraCore, Exim, Mozilla Firefox, Linux Kernel, Siemens SIMATIC CP, and Treck TCP/IP stack.
Included in the list are five issues discovered in Cisco RV routers, which CISA notes are being exploited in real-world attacks. The flaws, which came to light early last month, allow for the execution of arbitrary code with root privileges.
Three of the vulnerabilities – CVE-2022-20699, CVE-2022-20700, and CVE-2022-20708 – are rated 10 out 10 on the CVSS rating scale, enabling an attacker to inject malicious commands, elevate privileges to root, and run arbitrary code on vulnerable systems.
CVE-2022-20701 (CVSS score: 9.0) and CVE-2022-20703 (CVSS score: 9.3) are no different in that they could allow an adversary to "execute arbitrary code elevate privileges, execute arbitrary commands, bypass authentication and authorization protections, fetch and run unsigned software, or cause a denial of service," CISA added.
Cisco, for its part, previously acknowledged that it's "aware that proof-of-concept exploit code is available for several of the vulnerabilities." Additional nature of the attacks or the threat actors that may be weaponizing them is unknown as yet.
To reduce the significant risk of the vulnerabilities and prevent them from being used as a vector for potential cyber-attacks, federal agencies in the U.S. are mandated to apply the patches by March 17, 2022.
The development comes shortly after Cisco released patches for critical security vulnerabilities affecting Expressway Series and Cisco TelePresence Video Communication Server (VCS) earlier in the week that could be exploited by a malicious party to gain elevated privileges and execute arbitrary code.
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