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DpicApplication · Dpic Project

CVE-2021-33388

CRITICAL · 9.8 CVSS v3.1 Published 2023-08-22
Mitigation only
No fix yet — a mitigation exists. There is no fixed release. A documented workaround reduces exposure in the meantime.
See remediation →
100/100
Remediation priority · Urgent
Remotely reachable No privileges Zero-click

Official description Straight from the sourceThe vendor's or NVD's own wording, published unedited. Authoritative, but often terse — it says what broke, rarely what to do.

NVD · unedited
dpic 2021.04.10 has a Heap Buffer Overflow in themakevar() function in dpic.y

Technical summary Written by usOur analysis, written from the advisory, the CVSS vector and the affected-version data. It adds context the advisory leaves out, and never invents facts that are not in the source.

dbcve analysis · moderate confidence

A heap buffer overflow vulnerability exists in the makevar() function in dpic.y (version 2021.04.10). This memory corruption issue in the parser code could allow an attacker to overwrite heap metadata or adjacent memory, potentially leading to arbitrary code execution.

MitigationUpdate to a patched version of dpic if available, or implement proper bounds checking in the makevar() function to validate buffer sizes before heap operations.

Verify against the referenced sources before acting — the references below are authoritative for this CVE, this summary is not.

Affected products & versions What the vendor confirmedThe version ranges the vendor confirmed as vulnerable. If your version sits inside a range here, treat yourself as exposed until you have upgraded.

NVD · CPE data
DpicApplication
Affected:= 2021-04-10

CVSS breakdown How the score is builtThe industry scoring standard. It rates how the flaw is reached, what it takes to exploit, and what an attacker gains — the score is derived from those, not the other way round.

From the vector
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

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

Am I affected? How to checkSteps we derive from the advisory and the affected-version data, so you can decide whether this CVE reaches your setup. They are a guide, not a scan — your own configuration is the authority.

dbcve checks

Work through these to decide whether this CVE applies to you.

  1. Identify dpic installation
    Run 'dpic -V' or 'dpic --version' to retrieve the installed dpic version
    Affected if Version shown is 2021-04-10 exactly
  2. Check dpic binary or source version
    Inspect the dpic binary metadata, or check the source file dpic.y for version string '2021.04.10'
    Affected if The version string matches 2021-04-10 or 2021.04.10
  3. Verify makevar function presence
    Check if the dpic binary was built from the vulnerable dpic.y source containing the makevar() function in parser code
    Affected if The makevar() function exists in the parser source and the build is from the 2021-04-10 release

You are affected if the installed dpic version is exactly 2021-04-10 (or 2021.04.10), as this specific release contains the heap buffer overflow in the makevar() parser function.

Generated from the published advisory. Verify against your own configuration.

Check your environment

Paste your version and any relevant configuration and it will be compared against the affected criteria above. Do not include secrets or credentials.

AI-assisted, checked against the advisory. Informational, not a guarantee.

Remediation Closing itWhat it takes to close this. Where a vendor fix exists we point at it; where none exists we say so plainly, and can build one. Effort estimates are scoped from the advisory, not from your codebase.

From vendor data
Mitigation available No clean upgrade yet — mitigate in the meantime
Mitigation

Update to a patched version of dpic if available, or implement proper bounds checking in the makevar() function to validate buffer sizes before heap operations.

Fix this in Dpic Scoped from the published advisory
  • Consultation2.0 h
  • Implementation4.0 h
  • Testing4.0 h
  • Review / QA2.0 h
12.0 hours of engineering $2,080
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References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.

Primary sources

Practitioner notes

Contributed

Peer-ranked notes from engineers who’ve handled CVE-2021-33388 in production — separate from our analysis above.

No notes yet

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What this is

A place for practitioners to share what actually worked: a mitigation you’ve tested, a configuration change, a version- or environment-specific caveat, or a link to a verified patch. The most useful notes rise to the top as peers upvote them, so the signal stays high.

What belongs here
  • Verified mitigations, workarounds, and config changes
  • Version or environment caveats, and links to real fixes
  • No weaponised exploit code, or anything meant to cause harm
  • No spam, self-promotion, credentials, or personal data