Netty is a network application framework for development of protocol servers and clients. In versions 4.2.0.Final through 4.2.15.Final and 4.1.0.Final through 4.1.135.Final, any caller that can deliver bytes to a Netty channel pipeline containing `XmlDecoder` can send XML with a `DOCTYPE` declaration to an `AsyncXMLInputFactory` instantiated with no security configuration, leaving DTD and entity handling active depending on Aalto XML async parser behavior and creating conditional XML external entity risk. This issue is fixed in versions 4.1.136.Final and 4.2.16.Final.
Attack Parameters
Attack Vector
Network
Can be exploited remotely
Attack Complexity
Low
Easy to exploit
Attack Requirements
Present
Additional conditions required
Privileges Required
None
No privileges needed
User Interaction
None
No user interaction needed
Impact Assessment
Confidentiality
High
Complete data leak
Integrity
None
No data modification
Availability
Low
Partial disruption
CVSS Vector v4.0
Weakness Type (CWE)
Vulnerable Products 2
| Configuration | From (including) | Up to (excluding) |
|---|---|---|
|
Netty Netty
cpe:2.3:a:netty:netty:*:*:*:*:*:*:*:*
|
4.1.0
|
4.1.136
|
|
Netty Netty
cpe:2.3:a:netty:netty:*:*:*:*:*:*:*:*
|
4.2.0
|
4.2.16
|
References 5
https://github.com/netty/netty/commit/5b68c61f37aa4a3045cba624cbea239655c9003b
security-advisories@github.com
https://github.com/netty/netty/commit/bb2ff68a1fb71cb4b0eb9a9e17b66c52aff680c6
security-advisories@github.com
https://github.com/netty/netty/releases/tag/netty-4.1.136.Final
security-advisories@github.com
https://github.com/netty/netty/releases/tag/netty-4.2.16.Final
security-advisories@github.com
https://github.com/netty/netty/security/advisories/GHSA-4qhr-g3c6-fcfx
security-advisories@github.com