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CVE-2021-22570— Nullptr Dereference in Protobuf

Quick assessment

Affected
Google LLC Protobuf
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.

Google protobuf是美国谷歌（Google）公司的一种数据交换格式。 Google protobuf 存在代码问题漏洞，该漏洞源于当原始符号中存在空字符时，Nullptr 取消引用。 符号解析不正确，导致在生成错误消息期间未经检查地调用 proto 文件的名称。 由于符号解析不正确，因此文件为 nullptr。

CVSS 6.5 · Medium EPSS 2.66% · P85

Possible ATT&CK Techniques 1 AI

T1203 · Exploitation for Client Execution
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I. Basic Information for CVE-2021-22570

Vulnerability Information
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Vulnerability Title
Nullptr Dereference in Protobuf
Source: CVE Program / CVE List V5
Vulnerability Description
Nullptr dereference when a null char is present in a proto symbol. The symbol is parsed incorrectly, leading to an unchecked call into the proto file's name during generation of the resulting error message. Since the symbol is incorrectly parsed, the file is nullptr. We recommend upgrading to version 3.15.0 or greater.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
空指针解引用
Source: CVE Program / CVE List V5
Vulnerability Title
Google protobuf 代码问题漏洞
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 存在代码问题漏洞，该漏洞源于当原始符号中存在空字符时，Nullptr 取消引用。 符号解析不正确，导致在生成错误消息期间未经检查地调用 proto 文件的名称。 由于符号解析不正确，因此文件为 nullptr。
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 Protobuf unspecified ~ 3.15.0 -

II. Public POCs for CVE-2021-22570

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III. Intelligence Information for CVE-2021-22570

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Vendor Advisories for CVE-2021-22570 (2)

Mailing List Discussions for CVE-2021-22570 (8)

Other References for CVE-2021-22570 (1)

IV. Related Vulnerabilities

Same product: Protobuf
Same vendor: Google LLC
Same weakness: CWE-476

V. Comments for CVE-2021-22570

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