Description
Allocation of Resources Without Limits or Throttling vulnerability in benoitc hackney allows Flooding. The URL parser in src/hackney_url.erl converts every unrecognized URL scheme to a permanent BEAM atom via binary_to_atom/2. BEAM atoms are never garbage-collected and the atom table defaults to a hard limit of 1,048,576 entries. An attacker who can supply URLs with attacker-chosen scheme prefixes — directly as request targets, as configured webhook URLs, or via Location headers followed during redirects — can exhaust the atom table and crash the entire BEAM VM with system_limit. This issue affects hackney: from 2.0.0 before 4.0.1.
Affected products
Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.
benoitc hackney
Default version status: unaffected
2.0.0 to < 4.0.1affected
pkg:hex/hackneybenoitc hackney
Default version status: unaffected
d9713695c0d99855d12c73fd8a0b4be0543950c4 to < 31f6f0e27e096ad88743dfded4f030a3ee74972eaffected
pkg:github/benoitc/hackney