Home/CVE/Nullptr dereference when a null char is present in a proto symbol. The symbol is parsed incorrectly, leading to an unche
CVE

CVE-2021-22570

Nullptr dereference when a null char is present in a proto symbol. The symbol is parsed incorrectly, leading to an unche

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.

MEDIUM · CVSS 6.5 EPSS 0.00138
Monitor
  • No active-exploitation, high-EPSS, or public-exploit signals - routine patching cadence
Sigma rules2 YARA rules0

Weakness Classification

Affected Products & Versions

8

Affected Packages

5
Language-ecosystem packages (from OSV) tied to this CVE, with the version that fixes it - the dependency-level detail NVD doesn’t carry.
Go github.com/protocolbuffers/protobuf HIGH fixed in 0.0.0-20210218195015-ae50d9b99025
Maven com.google.protobuf:protobuf-java HIGH fixed in 3.15.0
NuGet Google.Protobuf HIGH fixed in 3.15.0
Packagist google/protobuf HIGH fixed in 3.15.0
PyPI protobuf fixed in 3.15.0

Sigma Hunt Rules

2
Exact rules name this CVE ID. Product rules name an affected product in their title. Related rules cover techniques used by actors who exploited this CVE. Showing the most relevant matches; the complete related set is on the full drill-down.
producthighOpenCanary - MySQL Login Attempt
producthighUncommon File Creation By Mysql Daemon Process

Scoring & Timeline

6.5
MEDIUM · CVSS v3.1 · cve-coordination@google.com
View on NVD
Attack Vector
Network Adjacent Local Physical
Attack Complexity
Low High
Privileges Required
None Low High
User Interaction
None Required
Scope
Unchanged Changed
Confidentiality
None Low High
Integrity
None Low High
Availability
None Low High
Published to NVD26 Jan 2022 · 02:15 PM
CVSS VectorCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
SSVC triage · cisa-vulnrichment
Exploitation
none
Automatable
no
Technical impact
partial
SSVC asks the questions that actually drive patch urgency: is it being exploited, can attacks be automated, and how total is the impact.

Vendor Advisories

16
suse-csafSUSE-SU-2023:2783-2
suse-csafSUSE-SU-2023:2783-1
suse-csafSUSE-SU-2022:1040-3
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