CVE-2023-34462
This vulnerability has been fixed in version 4.1.94.Final.
Does this matter?
Lower severity and a low EPSS score (2.46%). Track it; it rarely justifies an emergency change on its own.
Description
Netty is an asynchronous event-driven network application framework for rapid development of maintainable high performance protocol servers & clients. The `SniHandler` can allocate up to 16MB of heap for each channel during the TLS handshake. When the handler or the channel does not have an idle timeout, it can be used to make a TCP server using the `SniHandler` to allocate 16MB of heap. The `SniHandler` class is a handler that waits for the TLS handshake to configure a `SslHandler` according to the indicated server name by the `ClientHello` record. For this matter it allocates a `ByteBuf` using the value defined in the `ClientHello` record. Normally the value of the packet should be smaller than the handshake packet but there are not checks done here and the way the code is written, it is possible to craft a packet that makes the `SslClientHelloHandler`. This vulnerability has been fixed in version 4.1.94.Final.
- CVSS 3.1
- 6.5 MEDIUMCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
- EPSS
- 2.46% probability · 84th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-400, CWE-770
- Affected
- netty/netty
- Source
- security-advisories@github.com
References
- https://github.com/netty/netty/commit/535da17e45201ae4278c0479e6162bb4127d4c32Patch
- https://github.com/netty/netty/security/advisories/GHSA-6mjq-h674-j845Exploit, Vendor Advisory
- https://security.netapp.com/advisory/ntap-20230803-0001/
- https://security.netapp.com/advisory/ntap-20240621-0007/
- https://www.debian.org/security/2023/dsa-5558
- https://github.com/netty/netty/commit/535da17e45201ae4278c0479e6162bb4127d4c32Patch
- https://github.com/netty/netty/security/advisories/GHSA-6mjq-h674-j845Exploit, Vendor Advisory
- https://security.netapp.com/advisory/ntap-20230803-0001/
- https://security.netapp.com/advisory/ntap-20240621-0007/
- https://www.debian.org/security/2023/dsa-5558
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.