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Fencer Vulns
medium 5.5

CVE-2018-16982 json

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

published 2018-09-13 8 y ago modified 2026-06-17 4 mo ago also GHSA-9qh2-6fxg-9m4g , EUVD-2018-0150

cvss
5.5
version 3.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
1.1%
EPSS 1.1% chance of exploitation in 30 days, percentile 65%
public exploits
0
none known

Summary

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.

Patch / fix

  • npm opencc 1.1.2
  • opencc SLE Module for Desktop Applications 15 SP6, SLE Module for Desktop Applications 15 SP5, openSUSE Leap 15.5 1.0.5-150000.5.3.1
  • opencc SLES for SAP 12 SP5, SLES 12 SP5, SLE Software Development Kit 12 SP5 1.0.3-5.3.1

suse advisories SUSE-SU-2024:2102-1SUSE-SU-2022:4288-1

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2018-16982 updated cvss 4.7

opencc: out-of-bounds keyOffset and valueOffset values in BinaryDict::NewFromFile in BinaryDict.cpp

  • Red Hat Enterprise Linux 7 opencc, opencc-tools Red Hat Enterprise Linux 8 opencc
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Exploit prediction

1.09% chance of exploitation in the next 30 days, higher than 65% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • github.com https://github.com/BYVoid/OpenCC/issues/303 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
NVD 3.0 5.5 CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
NVD 2.0 4.3 AV:N/AC:M/Au:N/C:N/I:N/A:P
GitHub 3.0 5.5 CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

Affected packages

ecosystem package affected fixed in
npm opencc
<1.1.2
1.1.2

Classification

Weakness

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.