Advisory details:
vulnrichment / CVE-2023-34462
| Advisory ID | vulnrichment/CVE-2023-34462 |
| Aliases | |
| Summary | 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. |
| Status | Published |
| Exploitability | 0.5 |
| Weighted Severity | 0.0 |
| Risk | |
| Affected and Fixed Packages | Package Details |
| Introduced and Fixed Package Commit Patches | Package Commit Patches Details |
| System | Score | Found at |
|---|---|---|
| cvssv3.1 | 6.5 | |
| ssvc | Track |
| Reference id | Reference type | URL |
|---|---|---|
| https://github.com/netty/netty/commit/535da17e45201ae4278c0479e6162bb4127d4c32 | ||
| https://www.debian.org/security/2023/dsa-5558 | ||
| GHSA-6mjq-h674-j845 | https://github.com/netty/netty/security/advisories/GHSA-6mjq-h674-j845 | |
| ntap-20230803-0001 | Other | https://security.netapp.com/advisory/ntap-20230803-0001/ |
| ntap-20240621-0007 | Other | https://security.netapp.com/advisory/ntap-20240621-0007/ |
No EPSS data available for this advisory.
| Patch URL | |
|---|---|
| There are no known patches. | |
| Attack Vector (AV) | Attack Complexity (AC) | Privileges Required (PR) | User Interaction (UI) | Scope (S) | Confidentiality Impact (C) | Integrity Impact (I) | Availability Impact (A) |
|---|---|---|---|---|---|---|---|
network adjacent_network local physical |
low high |
none low high |
none required |
unchanged changed |
high low none |
high low none |
high low none |
Vector: SSVCv2/E:N/A:N/T:P/P:M/B:A/M:M/D:T/2024-07-16T18:36:13Z/
Decision: Track
Source URL: https://github.com/cisagov/vulnrichment/blob/develop/2023/34xxx/CVE-2023-34462.json
Source Advisory: vulnrichment/CVE-2023-34462
[{'Exploitation': 'none'},
{'Automatable': 'no'},
{'Technical Impact': 'partial'},
{'Mission Prevalence': 'minimal'},
{'Public Well-being Impact': 'material'},
{'Mission & Well-being': 'medium'}]