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Home > Cybersecurity > Research unveils a new CPDoS web cache poisoning attack

Research unveils a new CPDoS web cache poisoning attack

Erdem Yasar by Erdem Yasar
October 27, 2019
in Cybersecurity, Network/Internet
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TH Koln researchers have discovered a new type of attack that can poison CDNs into caching, causing them to serve error pages instead of websites. This new attack is named CPDoS, short for Cache-Poisoned Denial-of-Service.

There are three variants of CPDoS attacks, HTTP Header Oversize (HHO), HTTP Meta Character (HMC) and HTTP Methos Override (HMO). As the names imply, the attack method includes malformed headers. It is possible to do so by using oversized header fields, meta character that can trigger errors, or instructions that override server responses.

TH Koln crew claims that they successfully carry the CPDoS attacks against the test websites hosted on the network of variety of CDN providers. It is possible to avoid these attacks by configuring their CDN service to not to cache HTTP error pages by default. This setting is easily accessible in most CDN service providers’ dashboards.

See more Cyber Security News


Tags: TH Koln
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Erdem Yasar

Erdem Yasar

Erdem Yasar is a news editor at Cloud7 News. Erdem started his career by writing video game reviews in 2007 for PC World magazine while he was studying computer engineering. In the following years, he focused on software development with various programming languages. After his graduation, he continued to work as an editor for several major tech-related websites and magazines. During the 2010s, Erdem Yasar shifted his focus to cloud computing, hosting, and data centers as they were becoming more popular topics in the tech industry. Erdem Yasar also worked with various industry-leading tech companies as a content creator by writing blog posts and other articles. Prior to his role at Cloud7 News, Erdem was the managing editor of T3 Magazine.

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