Description
An integer overflow in the PngImg::InitStorage_() function of png-img before 3.1.0 leads to an under-allocation of heap memory and subsequently an exploitable heap-based buffer overflow when loading a crafted PNG file.
Remediation
References
https://github.com/gemini-testing/png-img
https://github.com/gemini-testing/png-img/commit/14ac462a32ca4b3b78f56502ac976d5b0222ce3d
https://github.com/gemini-testing/png-img/compare/v3.0.0...v3.1.0
https://securitylab.github.com/advisories/GHSL-2020-142-gemini-png-img
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