ooni@mastodon.social - Starting June 22nd, OONI data from China shows the blocking of F-Droid by means of DNS injection, where an unrelated IP address (e.g., DropBox) is returned to the client.
This technique is commonly used in China to restrict access to services.
OONI data showing the block of F-Droid on at least 4 networks can be found here
#FDroid #China #censorship #DNS #DNSinjection
This technique is commonly used in China to restrict access to services.
OONI data showing the block of F-Droid on at least 4 networks can be found here
#FDroid #China #censorship #DNS #DNSinjection
Forwarded from Pegasus NSO & other spyware
Wallbleed: A Memory Disclosure Vulnerability in the Great Firewall of China | gfw report
#DNS #DNSInjection #GreatFirewall #China
We present Wallbleed, a buffer over-read vulnerability that existed in the DNS injection subsystem of the Great Firewall of China. Wallbleed caused certain nation-wide censorship middleboxes to reveal up to 125 bytes of their memory when censoring a crafted DNS query. It afforded a rare insight into one of the Great Firewall’s well-known network attacks, namely DNS injection, in terms of its internal architecture and the censor’s operational behaviors.#DNS #DNSInjection #GreatFirewall #China