Home/CVE/A flaw was found in OpenJPEG’s encoder in the opj_dwt_calc_explicit_stepsizes() function. This flaw allows an attacker
CVE

CVE-2020-27824

A flaw was found in OpenJPEG’s encoder in the opj_dwt_calc_explicit_stepsizes() function. This flaw allows an attacker

A flaw was found in OpenJPEG’s encoder in the opj_dwt_calc_explicit_stepsizes() function. This flaw allows an attacker who can supply crafted input to decomposition levels to cause a buffer overflow. The highest threat from this vulnerability is to system availability.

MEDIUM · CVSS 5.5 EPSS 0.00175
Monitor
  • No active-exploitation, high-EPSS, or public-exploit signals - routine patching cadence
Sigma rules0 YARA rules0
⬡

Weakness Classification

CWE-125Out-of-bounds Read
CWE-20Improper Input Validation
▤

Affected Products & Versions

4
uclouvain openjpeg< 2.4.0
redhat enterprise linuxall versions
fedoraproject fedoraall versions
debian linuxall versions
▣

Scoring & Timeline

5.5
MEDIUM · CVSS v3.1 · secalert@redhat.com
View on NVD
Attack Vector
Network Adjacent Local Physical
Attack Complexity
Low High
Privileges Required
None Low High
User Interaction
None Required
Scope
Unchanged Changed
Confidentiality
None Low High
Integrity
None Low High
Availability
None Low High
Published to NVD13 May 2021 · 02:15 PM
CVSS VectorCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
⚑

Vendor Advisories

11
msrcCVE-2020-27824
suse-csafopenSUSE-SU-2024:13571-1
usnUSN-5952-1
suse-csafSUSE-SU-2022:4082-1
suse-csafSUSE-SU-2022:3801-1
🔗

References & Sources

6
Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.
https://bugzilla.redhat.com/show_bug.cgi?id=1905723Issue TrackingPatchThird Party Advisory
https://lists.debian.org/debian-lts-announce/2021/02/msg00011.htmlMailing ListThird 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://www.oracle.com/security-alerts/cpuoct2021.htmlPatchThird Party Advisory
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