CVE-2023-23916

An allocation of resources without limits or throttling vulnerability
exists in curl <v7.88.0 based on the “chained” HTTP compression algorithms,
meaning that a server response can be compressed multiple times and
potentially with differentalgorithms. The number of acceptable “links” in
this “decompression chain” wascapped, but the cap was implemented on a
per-header basis allowing a maliciousserver to insert a virtually unlimited
number of compression steps simply byusing many headers. The use of such a
decompression chain could result in a “malloc bomb”, making curl end up
spending enormous amounts of allocated heap memory, or trying to and
returning out of memory errors.

Notes