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hackeroneMonneratH1:1886139
HistoryFeb 24, 2023 - 3:01 p.m.

Internet Bug Bounty: HTTP multi-header compression denial of service

2023-02-2415:01:59
monnerat
hackerone.com
257
internet bug bounty
http
multi-header compression

EPSS

0.002

Percentile

53.6%

A server can send an HTTP response with many occurrences of Transfer-Encoding and/or Content-Encoding headers. Each listed encoding allocates a buffer. The number of encodings listed within each header is already limited but the number of headers is not, allowing an HTTP response to consume all available memory.

Impact

Consumes all available memory, resulting in a DoS.