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CVE Record

CVE-2021-29338: Integer Overflow in OpenJPEG v2.4.0 allows remote attackers to crash the application, causing a Denial of S...

Integer Overflow in OpenJPEG v2.4.0 allows remote attackers to crash the application, causing a Denial of Service (DoS). This occurs when the attacker uses the command line option "-ImgDir" on a directory that contains 1048576 files.

UnknownCVSS not scoredNot KEV-listedUpdated
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Glexia's TakeAutomated analysislow

Security readout for executives and security teams

Plain-English summary

This issue can make an OpenJPEG 2.4.0 application crash, causing denial of service. The described trigger is unusual: processing a directory with 1,048,576 files through the -ImgDir option. Business urgency depends on whether OpenJPEG is exposed to untrusted batch processing.

Executive priority

Treat as a targeted availability risk for image-processing environments, not a broad emergency. Prioritize patching where OpenJPEG handles untrusted batch inputs or supports customer-facing processing workflows.

Technical view

CVE-2021-29338 is described as an integer overflow in OpenJPEG 2.4.0 causing application crash. The public description ties the condition to -ImgDir directory processing with 1,048,576 files. The bundle provides no CVSS, CWE, or confirmed code-level fix details.

Likely exposure

Likely exposure is limited to systems using OpenJPEG command-line or library workflows that process attacker-influenced directories. Standard image decoding paths may not match the described condition, based on the provided sources.

Exploitation context

The bundle does not show KEV listing or cited evidence of active exploitation. The trigger appears resource-shaping dependent and focused on denial of service, not code execution, based on the supplied description.

Researcher notes

Evidence is sparse: no CVSS, CWE, exploit status, or detailed fixed-version mapping is included in the bundle. Focus validation on the specific -ImgDir directory-processing scenario and distro advisory coverage.

Mitigation direction

  • Inventory OpenJPEG and openjpeg2 packages across servers and image-processing pipelines.
  • Apply vendor security updates from Fedora, Debian, Gentoo, or your platform vendor.
  • Restrict untrusted users from controlling OpenJPEG directory-processing inputs.
  • Monitor vendor advisories for precise fixed versions and backported package status.

Validation and detection

  • Check whether OpenJPEG 2.4.0 or vulnerable openjpeg2 packages are installed.
  • Review jobs or services that invoke OpenJPEG with directory-based batch processing.
  • Confirm package versions against applicable Fedora, Debian, Gentoo, or vendor advisories.
  • Verify no public service lets users supply processing directories or file batches.
Prepared
Confidence
medium
Sources
6

Public sources used

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.

Potential ATT&CK relevance

Conservative CVE-to-ATT&CK context

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CVE-2021-29338 mapping review

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Vulnerability profileCVE Program record
Severity
Unknown
CVSS
Not scored
Known Exploited
No
Published
Official CVE source material

CNA and ADP enrichment extracted from CVE v5

These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.

0CVSS vectors
0Timeline events
0ADP providers
7Source links

CVSS and timeline data

No CVSS vectors or timeline events were available in the normalized CVE source material.

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
n/an/an/aListed
Weakness

CWE details

No CWE listed

CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.