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Open Chinese Convert subject to Denial of Service via Out-of-bounds Read

Moderate severity GitHub Reviewed Published May 14, 2022 to the GitHub Advisory Database • Updated Feb 22, 2023

Package

pip OpenCC (pip)

Affected versions

< 1.1.2

Patched versions

1.1.2
npm opencc (npm)
< 1.1.2
1.1.2

Description

Open Chinese Convert (OpenCC) 1.0.5 allows attackers to cause a denial of service (segmentation fault) because BinaryDict::NewFromFile in BinaryDict.cpp may have out-of-bounds keyOffset and valueOffset values via a crafted .ocd file.

References

Published by the National Vulnerability Database Sep 13, 2018
Published to the GitHub Advisory Database May 14, 2022
Reviewed Sep 30, 2022
Last updated Feb 22, 2023

Severity

Moderate

CVSS overall score

This score calculates overall vulnerability severity from 0 to 10 and is based on the Common Vulnerability Scoring System (CVSS).
/ 10

CVSS v3 base metrics

Attack vector
Local
Attack complexity
Low
Privileges required
None
User interaction
Required
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High

CVSS v3 base metrics

Attack vector: More severe the more the remote (logically and physically) an attacker can be in order to exploit the vulnerability.
Attack complexity: More severe for the least complex attacks.
Privileges required: More severe if no privileges are required.
User interaction: More severe when no user interaction is required.
Scope: More severe when a scope change occurs, e.g. one vulnerable component impacts resources in components beyond its security scope.
Confidentiality: More severe when loss of data confidentiality is highest, measuring the level of data access available to an unauthorized user.
Integrity: More severe when loss of data integrity is the highest, measuring the consequence of data modification possible by an unauthorized user.
Availability: More severe when the loss of impacted component availability is highest.
CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

EPSS score

0.067%
(31st percentile)

Weaknesses

CVE ID

CVE-2018-16982

GHSA ID

GHSA-9qh2-6fxg-9m4g

Source code

Credits

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