![]() Until Cisco develops a complete patch for the ASA and FTD software, it recommends admins implement a series of workarounds to protect against attacks.įor the clientless SSL VPN situation, this includes configuring a dynamic access policy (DAP) to terminate VPN tunnel establishment when the DefaultADMINGroup or DefaultL2LGroup connection profile/tunnel group is used. And if your Cisco VPNs already use MFA, make sure it's configured properly. "Rapid7 has not observed any bypasses or evasion of correctly configured MFA," the security researchers added.Īccording to the September 7 update: "CVE-2023-20269 is being exploited in the wild and is related to some of the behavior Rapid7 has observed and outlined in this blog."Ĭonsidering that Cisco has pointed to ransomware crews attacking VPNs that don't use MFA, and Rapid7 has said that criminals haven't been able to break into accounts that use two-factor authentication, we highly recommend implementing MFA as your first line of defense. US, UK sanction more Russians linked to Trickbot.Apple races to patch the latest zero-day iPhone exploit.Cisco's Duo Security suffers major authentication outage.There's a good chance your VPN is vulnerable to privacy-menacing TunnelCrack attack The new NoEscape ransomware operation is believed to be a rebrand of Avaddon, a ransomware gang that shut down and released its decryption keys in 2021. ![]() Rapid7 also noted the victims spanned healthcare, professional services, manufacturing, oil and gas, and other industries. These break-ins resulted in ransomware infections in companies of all sizes by Akira and LockBit. In an August 29 post updated on Thursday, that security firm said it spotted "at least 11 customers who experienced Cisco ASA-related intrusions between March 30 and August 24, 2023." During the initial hack, ransomware software infects a system and encrypts files and/or locks system access. Before recovering the system, the ransomware must be removed. Rapid7 reported the exploitation attempts to Cisco, and has been working with the IT giant to address the issue. Some tools are available as freeware, while others require a paid subscription. It also directs customers to an earlier write-up about the Akira ransomware gang targeting Cisco VPNs that are not configured for MFA and vulnerable to brute-force logins. If the ransomware doesnt announce its own name, then try the Crypto Sheriff online tool or the ID Ransomware. "Cisco strongly recommends that customers upgrade to a fixed software release to remediate this vulnerability once available and apply one of the suggested workarounds in the meantime," its security advisory reads. Figure out exactly which strain of encrypting ransomware youre dealing with. The software may "allow an unauthenticated, remote attacker to conduct a brute force attack in an attempt to identify valid username and password combinations," the IT giant noted, "or an authenticated, remote attacker to establish a clientless SSL VPN session with an unauthorized user." Akira, LockBit behind exploits
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