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CVE-2018-20847

27
FAUCET Score

CVE-2018-20847 describes an integer overflow vulnerability in OpenJPEG through version 2.3.0, specifically within the opj_get_encoding_parameters function, impacting Debian and UCLouvain distributions using OpenJPEG. This high-severity flaw (CVSS 8.8) is remotely exploitable with low attack complexity, requiring user interaction, and could lead to high impacts on confidentiality, integrity, and availability. Currently, there is no evidence of active exploitation, no publicly available exploit code in common databases like Metasploit or ExploitDB, and minimal community discussion or media coverage.

Impacted Technologies

VendorProductVersion(s)CPE
<= 2.3.0CPE matchmatch criteria
cpe:2.3:a:uclouvain:openjpeg:*:*:*:*:*:*:*:*
8.0CPE matchmatch criteria
cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

8.8HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
2.8
Impact Score
5.9
CvssVersion
3.1

Exploit Intelligence

EPSS Score
2.17%
Probability of exploitation in next 30 days
EPSS Percentile
80.4%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0217 is in the 79th percentile among its peer group of 14,875 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.2 Bluesky, 0.1 Mastodon, and 0.2 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.1 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (2)

github_advisorypatch availablevia nvd_reference
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 8Fixed in: openjpeg2-0:2.4.0-4.el8
View patch

Vendor Advisories (1)

redhatCVE-2018-20847Low

openjpeg: integer overflow in function opj_get_encoding_parameters in openjp2/pi.c

Jun 26, 2019

References

github.com / uclouvain/openjpeg/commit/5d00b719f4b93b1445e6fb4c766b9a9883c57949
Patch
github.com / uclouvain/openjpeg/issues/431
Issue TrackingPatchThird Party Advisory
github.com / uclouvain/openjpeg/pull/1168/commits/c58df149900df862806d0e892859b41115875845
Patch
lists.debian.org / debian-lts-announce/2019/07/msg00010.html
Issue TrackingThird Party Advisory
securityfocus.com / bid/108921
Broken LinkThird Party AdvisoryVDB Entry