Protocol::HTTP2 versions before 1.13 for Perl is vulnerable to a HTTP/2 Bomb. Protocol::HTTP2's inbound HPACK path has no header-list size limit, so a small HTTP/2 request can expand into large server memory (the "HTTP/2 bomb"). The headers_decode method materialises a full key+value copy per indexed reference with no running size check, and the stream_header_block_add method appends (since version 1.12) every CONTINUATION frame to the per-stream buffer unbounded. MAX_HEADER_LIST_SIZE (default 65536) is advertised in SETTINGS but never consulted on decode. It is absent from the decoder and from the :limits export tag.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
< 1.13CPE matchmatch criteria | cpe:2.3:a:crux:protocol\:\:http2:*:*:*:*:*:perl:*:* | ||
>= 0, < 1.13CPE match | cpe:2.3:a:crux:protocol\:\:http2:*:*:*:*:*:perl:*:* |
CVSS version used by this source: 3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
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