Web cache poisoning involves tricking a web cache into storing malicious content, leading to widespread security threats like XSS and phishing. Attackers exploit cache vulnerabilities to serve poisoned content to many users, amplifying the damage. #WebCachePoisoning #XSS #Phishing
Keypoints
- Web cache poisoning occurs when attackers manipulate cache responses to serve malicious content.
- Caches store server responses to improve load times, including CDNs, reverse proxies, and browsers.
- Attackers test for vulnerabilities by injecting unkeyed parameters and detecting reflection in cached responses.
- Consequences include stored XSS, phishing campaigns, brand defacement, and large-scale redirection attacks.
- Preventative measures include validating headers, defining precise cache keys, and restricting untrusted input sources.