Description
Netty is an asynchronous, event-driven network application framework. Prior to 4.2.13.Final and 4.1.133.Final, the Netty Redis codec encoder (RedisEncoder) writes user-controlled string content directly to the network output buffer without validating or sanitizing CRLF (\r\n) characters. Since the Redis Serialization Protocol (RESP) uses CRLF as the command/response delimiter, an attacker who can control the content of a Redis message can inject arbitrary Redis commands or forge fake responses. This vulnerability is fixed in 4.2.13.Final and 4.1.133.Final.
CVSS breakdown
CVSS 3.1
Attack Vector
Local
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
Low
Integrity
High
Availability
None
Affected products
- io.netty / netty-codec-redis>= 4.2.0.Alpha1, < 4.2.13.Final – >= 4.2.0.Alpha1, < 4.2.13.Final
- io.netty / netty-codec-redis< 4.1.133.Final – < 4.1.133.Final
- netty / netty>= 4.2.0.Alpha1, < 4.2.13.Final – >= 4.2.0.Alpha1, < 4.2.13.Final
- netty / netty< 4.1.133.Final – < 4.1.133.Final