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Unrated severityNVD Advisory· Published Dec 4, 2020· Updated Aug 4, 2024

CVE-2020-27766

CVE-2020-27766

Description

ImageMagick prior to 7.0.8-69 has undefined behavior in statistic.c when processing crafted files, potentially causing application crashes.

AI Insight

LLM-synthesized narrative grounded in this CVE's description and references.

ImageMagick prior to 7.0.8-69 has undefined behavior in statistic.c when processing crafted files, potentially causing application crashes.

Vulnerability

A flaw exists in ImageMagick's MagickCore/statistic.c where values outside the range of type unsigned long can lead to undefined behavior. An attacker who submits a crafted file processed by ImageMagick triggers this condition. This affects ImageMagick versions prior to 7.0.8-69 [1].

Exploitation

The attacker must supply a specially crafted image file and convince a user or automated process to open or convert it using an affected version of ImageMagick. No special privileges or network position are required beyond the ability to deliver the file for processing. The undefined behavior occurs during execution of the statistic functions.

Impact

The primary impact is to application availability, as the undefined behavior most likely causes a crash. However, because undefined behavior can theoretically manifest in other ways, additional consequences cannot be ruled out, though no specific impact was demonstrated [1]. Red Hat rated this as Low severity.

Mitigation

The issue is fixed in ImageMagick version 7.0.8-69 [1]. Users should upgrade to this or a later version. For Red Hat Enterprise Linux, versions 5, 6, and 7 are out of support scope; Inkscape in RHEL 8 uses a bundled ImageMagick that is not affected. No workaround is provided other than applying the patch.

References
  1. outside the range of representable values of type 'unsigned long' at MagickCore/statistic.c

AI Insight generated on May 26, 2026. Synthesized from this CVE's description and the cited reference URLs; citations are validated against the source bundle.

Affected products

40

Patches

0

No patches discovered yet.

Vulnerability mechanics

No source-code context for this CVE — mechanics is only generated when we can read the actual fix diff. Without that, the four sections (root cause, attack vector, affected code, fix) would be speculation rather than analysis.

References

3

News mentions

0

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