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CVE-2022-3171— Memory handling vulnerability in ProtocolBuffers Java core and lite

Quick assessment

Affected
Google LLC Protocolbuffers
Exploitation
Public or AI PoC available; prioritize validation
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Google protobuf是美国谷歌（Google）公司的一种数据交换格式。 Google protobuf 3.21.7、3.20.3、3.19.6 和 3.16.3之前版本存在安全漏洞，该漏洞源于在解析二进制和文本格式数据的过程中发现了 core 和 lite 中潜在的拒绝服务问题，包含多个具有重复或未知字段的非重复嵌入消息实例的输入流会导致对象在可变和不可变形式之间来回转换，从而导致潜在的长时间垃圾收集暂停。

CVSS 4.3 · Medium EPSS 1.14% · P65

Possible ATT&CK Techniques 1 AI

T1499 · Endpoint Denial of Service
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I. Basic Information for CVE-2022-3171

Vulnerability Information
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Vulnerability Title
Memory handling vulnerability in ProtocolBuffers Java core and lite
Source: CVE Program / CVE List V5
Vulnerability Description
A parsing issue with binary data in protobuf-java core and lite versions prior to 3.21.7, 3.20.3, 3.19.6 and 3.16.3 can lead to a denial of service attack. Inputs containing multiple instances of non-repeated embedded messages with repeated or unknown fields causes objects to be converted back-n-forth between mutable and immutable forms, resulting in potentially long garbage collection pauses. We recommend updating to the versions mentioned above.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
Source: CVE Program / CVE List V5
Vulnerability Type
输入验证不恰当
Source: CVE Program / CVE List V5
Vulnerability Title
Google protobuf 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Google protobuf是美国谷歌（Google）公司的一种数据交换格式。 Google protobuf 3.21.7、3.20.3、3.19.6 和 3.16.3之前版本存在安全漏洞，该漏洞源于在解析二进制和文本格式数据的过程中发现了 core 和 lite 中潜在的拒绝服务问题，包含多个具有重复或未知字段的非重复嵌入消息实例的输入流会导致对象在可变和不可变形式之间来回转换，从而导致潜在的长时间垃圾收集暂停。
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

Vendor Product Affected Versions CPE Subscribe
Google LLC Protocolbuffers 3.21.7 ~ 3.21.7 -

II. Public POCs for CVE-2022-3171

# POC Description Source Link Shenlong Link
AI-Generated POC Verified env Premium
Reproduced successfully in a real sandbox · Below is the actual recording of building the environment and exploiting the vulnerability.
Reproduction recording is a Pro+ exclusive
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claude_code · 2611 chars
GitHub 复现环境（可 clone 直接跑）
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POC zip download
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III. Intelligence Information for CVE-2022-3171

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Vendor Advisories for CVE-2022-3171 (2)

Mailing List Discussions for CVE-2022-3171 (2)

IV. Related Vulnerabilities

Same product: Protocolbuffers
Same vendor: Google LLC
Same weakness: CWE-20

V. Comments for CVE-2022-3171

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