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Posted: Mon Dec 09, 2024 10:31 am
TCP Vulnerability in GNU/Linux does not affect Mailfence
Picture of M Salman Nadeem
M Salman Nadeem
August 17, 2016
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Recently, a team of US security researchers have list of costa rica whatsapp phone numbers disclosed a TCP vulnerability in GNU/Linux ( CVE-2016-5696 ). After analyzing it, we have concluded that the bug does not pose a threat to our users. However, over the past week we have implemented additional measures to further strengthen Mailfence servers.
TCP vulnerability in GNU/Linux
The discovered TCP vulnerability has been present in the Linux kernel since 2012. It requires an attacker to have the IP addresses of both the client and the server. Due to the rate limit that the Linux kernel applies to challenge ACK packets, it is possible to hijack the TCP connection between the client and the server. This would allow (for example) an attacker to inject malicious code/data into the streaming of the HTTP communication.
This vulnerability can be exploited without the need for any " man in the middle " ( MiTM ) capabilities. This makes it possible to execute the attack "out of the way" without having the ability to directly spy on the network between client and server. This significantly reduces the difficulty of the attack. More information can be found in the research paper .
Picture of M Salman Nadeem
M Salman Nadeem
August 17, 2016
linux icon
Table of contents
Share the article:
Recently, a team of US security researchers have list of costa rica whatsapp phone numbers disclosed a TCP vulnerability in GNU/Linux ( CVE-2016-5696 ). After analyzing it, we have concluded that the bug does not pose a threat to our users. However, over the past week we have implemented additional measures to further strengthen Mailfence servers.
TCP vulnerability in GNU/Linux
The discovered TCP vulnerability has been present in the Linux kernel since 2012. It requires an attacker to have the IP addresses of both the client and the server. Due to the rate limit that the Linux kernel applies to challenge ACK packets, it is possible to hijack the TCP connection between the client and the server. This would allow (for example) an attacker to inject malicious code/data into the streaming of the HTTP communication.
This vulnerability can be exploited without the need for any " man in the middle " ( MiTM ) capabilities. This makes it possible to execute the attack "out of the way" without having the ability to directly spy on the network between client and server. This significantly reduces the difficulty of the attack. More information can be found in the research paper .