HTTP Response Splitting via Non-VCHAR Bytes in cowhttpstructhd:escapestring/2

Improper Handling of Highly Compressed Data (Data Amplification) vulnerability in ninenines cowlib allows unauthenticated remote denial of service via memory exhaustion.

cowspdy:inflate/2 in cowlib passes peer-supplied compressed bytes directly to zlib:inflate/2 with no output size bound. The SPDY header compression dictionary (?ZDICT) is public, and zlib compresses long runs of repeated bytes at roughly 1024:1, so a few kilobytes of SPDY frame payload can decompress to gigabytes on the BEAM heap, OOM-killing the node. A single unauthenticated SPDY frame is sufficient to trigger the condition. The parsers for synstream, synreply, and headers frame types are all affected via cowspdy:parseheaders/2.

This issue affects cowlib from 0.1.0 before 2.16.1.

CR Injection in SSE Encoder Enables Event Splitting via cowsse:event/1

Unbounded chunk-size hex digits in cowlib cause quadratic CPU and memory DoS