Vulnerability Details : CVE-2023-34462
Potential exploit
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.
Products affected by CVE-2023-34462
- cpe:2.3:a:netty:netty:*:*:*:*:*:*:*:*
Exploit prediction scoring system (EPSS) score for CVE-2023-34462
0.20%
Probability of exploitation activity in the next 30 days
EPSS Score History
~ 58 %
Percentile, the proportion of vulnerabilities that are scored at or less
CVSS scores for CVE-2023-34462
Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source | First Seen |
---|---|---|---|---|---|---|
6.5
|
MEDIUM | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H |
2.8
|
3.6
|
NIST | |
6.5
|
MEDIUM | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H |
2.8
|
3.6
|
GitHub, Inc. | |
6.5
|
MEDIUM | AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H |
N/A
|
N/A
|
Oracle:CPUOct2023 |
CWE ids for CVE-2023-34462
-
The product does not properly control the allocation and maintenance of a limited resource, thereby enabling an actor to influence the amount of resources consumed, eventually leading to the exhaustion of available resources.Assigned by: security-advisories@github.com (Primary)
-
The product allocates a reusable resource or group of resources on behalf of an actor without imposing any restrictions on the size or number of resources that can be allocated, in violation of the intended security policy for that actor.Assigned by: nvd@nist.gov (Secondary)
References for CVE-2023-34462
-
https://github.com/netty/netty/security/advisories/GHSA-6mjq-h674-j845
SniHandler 16MB allocation · Advisory · netty/netty · GitHubExploit;Vendor Advisory
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https://security.netapp.com/advisory/ntap-20240621-0007/
May 2024 IBM Cognos Analytics Vulnerabilities in NetApp Products | NetApp Product Security
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https://security.netapp.com/advisory/ntap-20230803-0001/
CVE-2023-34462 Apache Netty Vulnerability in NetApp Products | NetApp Product Security
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https://github.com/netty/netty/commit/535da17e45201ae4278c0479e6162bb4127d4c32
Merge pull request from GHSA-6mjq-h674-j845 · netty/netty@535da17 · GitHubPatch
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https://www.debian.org/security/2023/dsa-5558
Debian -- Security Information -- DSA-5558-1 netty
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