CVE-2023-32731— Information leak in gRPC
Quick assessment
Affected
Google gRPC
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.
gRPC是gRPC开源的一种现代、开源、高性能的远程过程调用 (RPC) 框架。 gRPC存在安全漏洞，该漏洞源于当 gRPC HTTP2 堆栈引发标头大小超出错误时，它会跳过解析 HPACK 帧的其余部分。这导致任何 HPACK 表的改动也被跳过，导致发送方和接收方之间的 HPACK 表不同步。攻击者利用该漏洞导致信息泄露和权限提升。
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I. Basic Information for CVE-2023-32731
Vulnerability Information
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Vulnerability Title
Information leak in gRPC
Source: CVE Program / CVE List V5
Vulnerability Description
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
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
预期行为违背
Source: CVE Program / CVE List V5
Vulnerability Title
gRPC 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
gRPC是gRPC开源的一种现代、开源、高性能的远程过程调用 (RPC) 框架。 gRPC存在安全漏洞，该漏洞源于当 gRPC HTTP2 堆栈引发标头大小超出错误时，它会跳过解析 HPACK 帧的其余部分。这导致任何 HPACK 表的改动也被跳过，导致发送方和接收方之间的 HPACK 表不同步。攻击者利用该漏洞导致信息泄露和权限提升。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
II. Public POCs for CVE-2023-32731
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Patches & Fixes for CVE-2023-32731 (1)
Same Patch Batch · Google · 2023-06-09 · 3 CVEs total
| CVE-2023-1428 | 7.5 HIGH | Denial-of-Service in gRPC |
| CVE-2023-32732 | 5.3 MEDIUM | Denial-of-Service in gRPC |
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