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Unknown
CVE-2020-21677
Disclosure Date: August 10, 2021 (last updated February 23, 2025)
A heap-based buffer overflow in the sixel_encoder_output_without_macro function in encoder.c of Libsixel 1.8.4 allows attackers to cause a denial of service (DOS) via converting a crafted PNG file into Sixel format.
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