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CVE Record

CVE-2020-36281: Leptonica before 1.80.0 allows a heap-based buffer over-read in pixFewColorsOctcubeQuantMixed in colorquant...

Leptonica before 1.80.0 allows a heap-based buffer over-read in pixFewColorsOctcubeQuantMixed in colorquant1.c.

UnknownCVSS not scoredNot KEV-listedUpdated
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Glexia's TakeAutomated analysismoderate

Security readout for executives and security teams

Plain-English summary

Leptonica versions before 1.80.0 can read past a heap buffer while processing certain color quantization logic. For executives, the concern is services that accept or process untrusted images through Leptonica or leptonlib, including embedded OCR or document pipelines.

Executive priority

Prioritize patching systems that process customer-supplied or internet-sourced images. Internal-only systems with controlled inputs are lower urgency, but should still be updated during normal maintenance.

Technical view

CVE-2020-36281 is a heap-based buffer over-read in pixFewColorsOctcubeQuantMixed in colorquant1.c. The public record identifies Leptonica before 1.80.0, with upstream commit and 1.80.0 comparison references, plus Debian, Fedora, and Gentoo security updates.

Likely exposure

Exposure is most likely in Linux packages or applications embedding Leptonica/leptonlib for image processing, OCR, document conversion, or thumbnailing. Risk depends on whether attacker-controlled images reach the affected code path.

Exploitation context

The provided bundle does not show CISA KEV listing or active exploitation. It references an OSS-Fuzz issue, which supports malformed-input discovery, but not real-world exploitation. Treat internet-facing image processing as higher priority.

Researcher notes

Evidence is sparse: no CVSS, CWE, or exploit details are included. Focus analysis on version exposure, reachable image-processing paths, and whether downstream packages have backported the upstream fix.

Mitigation direction

  • Upgrade Leptonica to 1.80.0 or later where available.
  • Apply distro security updates for leptonlib on Debian, Fedora, and Gentoo systems.
  • Update applications that bundle Leptonica instead of using system packages.
  • Limit processing of untrusted images until affected systems are patched.

Validation and detection

  • Inventory installed Leptonica or leptonlib versions across servers and containers.
  • Check application dependency manifests for bundled Leptonica copies.
  • Confirm distro package versions include the cited security update.
  • Test exposed image, OCR, and document-conversion workflows after patching.
Prepared
Confidence
medium
Sources
8

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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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
8Source 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

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