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15 lines
500 B
Markdown
15 lines
500 B
Markdown
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---
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synopsis: Fix a FOD sandbox escape
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issues:
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prs:
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---
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Cooperating Nix derivations could send file descriptors to files in the Nix
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store to each other via Unix domain sockets in the abstract namespace. This
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allowed one derivation to modify the output of the other derivation, after Nix
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has registered the path as "valid" and immutable in the Nix database.
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In particular, this allowed the output of fixed-output derivations to be
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modified from their expected content.
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This isn't the case any more.
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