CVE-2017-20286

CVSS 8.5 (high) · published 2026-10-14

DevIL through 1.8.0 contains a heap-based buffer overflow in iGetPalette() in il_gif.cpp that allows attackers to write beyond a 768-byte palette buffer when loading GIF images. Attackers can supply a crafted two-frame GIF whose second frame uses disposal method 1 with a local colour table, writing up to 384 controlled bytes past the heap allocation and possibly executing code.

Weakness: CWE-787

Source: NVD CVE-2017-20286

References

• https://github.com/DentonW/DevIL/blob/a2d9193fed0c7f93519c0c4c28b3348e0cb5759b/DevIL/src-IL/src/il_gif.cpp#L189-L226
• https://github.com/DentonW/DevIL/blob/a2d9193fed0c7f93519c0c4c28b3348e0cb5759b/DevIL/src-IL/src/il_gif.cpp#L314-L324
• https://github.com/DentonW/DevIL/issues/67
• https://hackmd.io/@haind-pwn/devil-gif-palette-reuse-heap-overflow
• https://www.vulncheck.com/advisories/devil-through-1.8.0-heap-buffer-overflow-via-gif-igetpalette

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