HOMEVULNERABILITIESCVE-2020-27823
HIGH

CVE-2020-27823

CWE-20Published: May 13, 2021· Updated: Jun 17, 2026

7.8
CVSS v3.1

Official Description

A flaw was found in OpenJPEG’s encoder. This flaw allows an attacker to pass specially crafted x,y offset input to OpenJPEG to use during encoding. The highest threat from this vulnerability is to confidentiality, integrity, as well as system availability.

NVD Source

Technical Analysis

CVE-2020-27823 requires local access, meaning attackers must already have a foothold on the target system.

Exploitation does not require any privileges, though user interaction (Required) is needed, which slightly reduces the risk of mass automated attacks.

A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), availability disruption (denial of service), with a CVSS base score of 7.8.

CVSS v3.1 Vector Breakdown

Exploitability
Attack VectorLocal
Attack ComplexityLow
Privileges Req.None
User InteractionRequired
ScopeUnchanged
Impact
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Affected Vendors & Products

Debian1 product(s)
debian linux
Fedora1 product(s)
fedora
uclouvain1 product(s)
openjpeg
Source: NVD CPE · 5 total CPE entries

Exploit & PoC Resources

NO KNOWN EXPLOITNo public exploit confirmed at this time
Exploit-DB
Offensive Security exploit database
GitHub PoC Search
Community PoC repositories
Rapid7 / Metasploit
Metasploit module search
PacketStorm
Security advisories & exploits
NVD Detail
Official NIST entry
MITRE CVE
CVE Program entry
External links open in a new tab. Always verify in a controlled environment before use.

Official Patches & Advisories

PATCHhttps://bugzilla.redhat.com/show_bug.cgi?id=1905762
PATCHhttps://bugzilla.redhat.com/show_bug.cgi?id=1905762
ADVISORYhttps://lists.debian.org/debian-lts-announce/2021/02/msg00011.html
ADVISORYhttps://www.debian.org/security/2021/dsa-4882
ADVISORYhttps://lists.debian.org/debian-lts-announce/2021/02/msg00011.html
ADVISORYhttps://www.debian.org/security/2021/dsa-4882

All References (10)

→
https://bugzilla.redhat.com/show_bug.cgi?id=1905762Issue Tracking · Patch · Third Party Advisory
→
https://lists.debian.org/debian-lts-announce/2021/02/msg00011.htmlMailing List · Third Party Advisory
→
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/OQR4EWRFFZQDMFPZKFZ6I3USLMW6TKTP/
→
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/WJUPGIZE6A4O52EBOF75MCXJOL6MUCRV/
→
https://www.debian.org/security/2021/dsa-4882Third Party Advisory
→
https://bugzilla.redhat.com/show_bug.cgi?id=1905762Issue Tracking · Patch · Third Party Advisory
→
https://lists.debian.org/debian-lts-announce/2021/02/msg00011.htmlMailing List · Third Party Advisory
→
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/OQR4EWRFFZQDMFPZKFZ6I3USLMW6TKTP/
→
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/WJUPGIZE6A4O52EBOF75MCXJOL6MUCRV/
→
https://www.debian.org/security/2021/dsa-4882Third Party Advisory

Quick Facts

CVE IDCVE-2020-27823
CVSS Score7.8 / 10
SeverityHIGH
WeaknessCWE-20
CISA KEVNo
Affected3 vendor(s)
PublishedMay 13, 2021

Related CVEs (CWE-20)

CVE-2008-6555
10.0
CVE-2011-0285
10.0
CVE-2023-41917
10.0
CVE-2003-1425
10.0
CVE-2011-1018
10.0
CVE-2013-1710
10.0

Recommended Actions

  • →Apply vendor patches immediately
  • →Monitor CVE-2020-27823 in threat intel feeds
  • →Review IDS/IPS signatures for exploitation attempts
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWATCH.COM. CVE data is provided under the NVD usage policy.
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