CVE-2018-16982

Exp

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.

Published: 2018-09-13 Last update: 2024-11-21 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2018-16982 is rated Exploit Available (55.4/100): CVSS Medium severity, with medium exploitation likelihood (EPSS 0.30%). 1 public exploit reference(s) are indexed (Exploit-DB). Public exploits are available—assess exposure, apply mitigations, and prioritize patching.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Public exploit references (Exploit-DB) for CVE-2018-16982

EDB-ID Source Kind Published Link
— nvd_ref exploit_tag Exploit-DB ↗

Exploit prediction scoring system (EPSS) score for CVE-2018-16982

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2025-12-02 0.36% 0.30% -0.06%
2 2025-11-21 0.16% 0.36% +0.20%
3 2025-11-18 — 0.16% —

Full EPSS history (16 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2018-16982

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
5.5 3.0 MEDIUM
CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H Click to expand
Attack vector (AV:L)
They already need access on the box, or another person has to do something wrong; it’s not a remote drive-by.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:R)
A real person has to do something—click, install, enable—otherwise it doesn’t land.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:N)
Doesn’t really leak secrets in a meaningful way.
Integrity (I:N)
Data isn’t meaningfully altered or forged.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 1.8 3.6 [email protected]
4.3 2.0 MEDIUM
AV:N/AC:M/Au:N/C:N/I:N/A:P Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:M)
Exploitation needs some favorable conditions, but not exceptional ones.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:N)
No confidentiality impact.
Integrity impact (I:N)
No integrity impact.
Availability impact (A:P)
Partial availability impact.
 8.6 2.9 [email protected]

Weakness enumeration for CVE-2018-16982

GitHub Security Advisory for CVE-2018-16982

GHSA-9qh2-6fxg-9m4g · Severity: medium · Ecosystem: npm — Open Chinese Convert subject to Denial of Service via Out-of-bounds Read

OS Trackers for CVE-2018-16982

vendor priority summary link
redhat low — https://access.redhat.com/security/cve/CVE-2018-16982
suse medium CVE-2018-16982 severity moderate: SUSE including 12 source package names (libopencc1_1, libopencc2-1.0.3-5.3.1, …), 28 product×package rows across 10 product lines (SUSE Linux Enterprise Module for Desktop Applications 15 SP5, SUSE Linux Enterprise Module for Desktop Applications 15 SP6, … (10 product lines)): Fixed 24, Known Not Affected 4. https://www.suse.com/security/cve/CVE-2018-16982/
ubuntu low CVE-2018-16982 low priority: Ubuntu including 1 source packages (opencc), 19 status rows across 19 suites (bionic, cosmic, disco, eoan, focal, groovy, hirsute, impish, jammy, kinetic, lunar, mantic, noble, oracular, plucky, questing, trusty, upstream, xenial): ignored 9, not-affected 5, needed 3, DNE 1, needs-triage 1. https://ubuntu.com/security/CVE-2018-16982

Affected software / configurations for CVE-2018-16982

Vendor Product Version Raw CPE
byvoid open_chinese_convert 1.0.5 cpe:2.3:a:byvoid:open_chinese_convert:1.0.5:*:*:*:*:*:*:*

References for CVE-2018-16982

URL Tags
https://github.com/BYVoid/OpenCC/issues/303 Exploit Vendor Advisory
cvelogic Threat Intelligence