# CVE-2023-32732: grpc: Package updates are available for Amazon Linux 2023 that fix the following vulnerabilities: CVE-2023-4785: 	Lack of e...

CVE-2023-32732 is fixed in 10 products on 1 platform, first by ALAS2023-2023-282, released August 3, 2023. It is not reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/cve/CVE-2023-32732
- Priority: High
- CVSS: n/a (important)
- EPSS: 0.0053
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Aug 3, 2023

## Description

Package updates are available for Amazon Linux 2023 that fix the following vulnerabilities: CVE-2023-4785: 	Lack of error handling in the TCP server in Google's gRPC starting version 1.23 on posix-compatible platforms (ex. Linux) allows an attacker to cause a denial of service by initiating a significant number of connections with the server. Note that gRPC C++ Python, and Ruby are affected, but gRPC Java, and Go are NOT affected.  CVE-2023-32732: 	gRPC contains a vulnerability whereby a client can cause a termination of connection between a HTTP2 proxy and a gRPC server: a base64 encoding error for `-bin` suffixed headers will result in a disconnection by the gRPC server, but is typically allowed by HTTP2 proxies. We recommend upgrading beyond the commit in  https://github.com/grpc/grpc/pull/32309 https://www.google.com/url  CVE-2023-32731: 	When gRPC HTTP2 stack raised a header size exceeded error, it skipped parsing the rest of the HPACK frame. This caused any HPACK table mutations to also be skipped, resulting in a desynchronization of HPACK tables between sender and receiver. If leveraged, say, between a proxy and a backend, this could lead to requests from the proxy being interpreted as containing headers from different proxy clients - leading to an information leak that can be used for privilege escalation or data exfiltration. We recommend upgrading beyond the commit contained in  https://github.com/grpc/grpc/pull/33005 https://github.com/grpc/grpc/pull/33005

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | grpc amzn 2023 | 1.56.2-10.amzn2023 | [ALAS2023-2023-282](https://patchblox.com/security/data/fix/linux/alas2023-2023-282.md) | Aug 3, 2023 |
| Linux | grpc-cpp amzn 2023 | 1.56.2-10.amzn2023 | [ALAS2023-2023-282](https://patchblox.com/security/data/fix/linux/alas2023-2023-282.md) | Aug 3, 2023 |
| Linux | grpc-cpp-debuginfo amzn 2023 | 1.56.2-10.amzn2023 | [ALAS2023-2023-282](https://patchblox.com/security/data/fix/linux/alas2023-2023-282.md) | Aug 3, 2023 |
| Linux | grpc-data amzn 2023 | 1.56.2-10.amzn2023 | [ALAS2023-2023-282](https://patchblox.com/security/data/fix/linux/alas2023-2023-282.md) | Aug 3, 2023 |
| Linux | grpc-debuginfo amzn 2023 | 1.56.2-10.amzn2023 | [ALAS2023-2023-282](https://patchblox.com/security/data/fix/linux/alas2023-2023-282.md) | Aug 3, 2023 |
| Linux | grpc-debugsource amzn 2023 | 1.56.2-10.amzn2023 | [ALAS2023-2023-282](https://patchblox.com/security/data/fix/linux/alas2023-2023-282.md) | Aug 3, 2023 |
| Linux | grpc-devel amzn 2023 | 1.56.2-10.amzn2023 | [ALAS2023-2023-282](https://patchblox.com/security/data/fix/linux/alas2023-2023-282.md) | Aug 3, 2023 |
| Linux | grpc-doc amzn 2023 | 1.56.2-10.amzn2023 | [ALAS2023-2023-282](https://patchblox.com/security/data/fix/linux/alas2023-2023-282.md) | Aug 3, 2023 |
| Linux | grpc-plugins amzn 2023 | 1.56.2-10.amzn2023 | [ALAS2023-2023-282](https://patchblox.com/security/data/fix/linux/alas2023-2023-282.md) | Aug 3, 2023 |
| Linux | grpc-plugins-debuginfo amzn 2023 | 1.56.2-10.amzn2023 | [ALAS2023-2023-282](https://patchblox.com/security/data/fix/linux/alas2023-2023-282.md) | Aug 3, 2023 |

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Data as of 2026-11-08T06:59:42Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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