Netty is an asynchronous, event-driven network application framework. Prior to 4.1.137.Final and 4.2.17.Final, io.netty.handler.codec.http.cors.CorsHandler setVaryHeader replaces application Vary headers such as Authorization or Cookie with Origin, allowing a caching proxy or CDN to reuse authenticated responses across users and disclose sensitive information. This issue is fixed in versions 4.1.137.Final and 4.2.17.Final.
Attack Parameters
Attack Vector
Network
Can be exploited remotely
Attack Complexity
High
Difficult to exploit
Privileges Required
None
No privileges needed
User Interaction
None
No user interaction needed
Impact Assessment
Confidentiality
High
Complete data leak
Integrity
Low
Partial data modification
Availability
None
No disruption
CVSS Vector v3.1
Weakness Type (CWE)
References 5
https://github.com/netty/netty/pull/17213
security-advisories@github.com
https://github.com/netty/netty/pull/17217
security-advisories@github.com
https://github.com/netty/netty/releases/tag/netty-4.1.137.Final
security-advisories@github.com
https://github.com/netty/netty/releases/tag/netty-4.2.17.Final
security-advisories@github.com
https://github.com/netty/netty/security/advisories/GHSA-8c42-7qj2-3j46
security-advisories@github.com