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Google Chrome to block port 554 to stop NAT Slipstreaming attacks By 01:21 PM Google Chrome will block the browser s access to TCP port 554 to protect against attacks using the NAT Slipstreaming 2.0 vulnerability. Last year, security researchers disclosed a new version of the NAT Slipstreaming vulnerability that allows malicious scripts to bypass a website visitor s NAT firewall and access any TCP/UDP port on the visitor s internal network. Illustration of the NAT Slipstreaming 2.0 attack As this vulnerability only works on specific ports monitored by a router s Application Level Gateway (ALG), browser developers, including Google, Safari, and Mozilla, have been blocking vulnerable ports that do not receive a lot of traffic.
minute read Share this article: A new version of NAT slipstreaming allows cybercriminals an easy path to devices that aren’t connected to the internet. Disconnecting devices from the internet is no longer a solid plan for protecting them from remote attackers. A new version of a known network-address translation (NAT) slipstreaming attack has been uncovered, which would allow remote attackers to reach multiple internal network devices, even if those devices don’t have access to the internet. According to researchers from Armis and Samy Kamkar, chief security officer and co-founder at Openpath Security, attackers can execute an attack by simply convincing one target with internet access on the network to click on a malicious link. From there, cybercriminals can gain access to other, non-exposed endpoints, including unmanaged devices like industrial controllers, with no further social engineering needed.
Last year s slipstream technique revived to pierce vulnerable firewalls – browsers patched to thwart bypass attempts Share Copy Video Ben Seri and Gregory Vishnepolsky, threat researchers at Armis, have found a way to expand upon the NAT Slipstream attack disclosed last year by Samy Kamkar, CSO of Openpath Security. The original NAT Slipstream potentially allowed a miscreant to access any TCP/UDP service tied to a victim s machine by bypassing the victim s NAT (Network Address Translation) and firewall defenses. It can be triggered via JavaScript code on a malicious website. NAT Slipstream v2 takes the technique further by allowing a hacker to penetrate a vulnerable NAT/firewall and reach any internal IP on the network, rather than just the IP address of the victim s device.