curl < 7.84.0 supports "chained" HTTP compression algorithms, meaning that a serverresponse can be compressed multiple times and potentially with different algorithms. The number of acceptable "links" in this "decompression chain" was unbounded, allowing a malicious server to insert a virtually unlimited number of compression steps.The use of such a decompression chain could result in a "malloc bomb", makingcurl end up spending enormous amounts of allocated heap memory, or trying toand returning out of memory errors.
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{ "availability": "No subscription required", "ubuntu_priority": "medium", "binaries": [ { "curl-dbgsym": "7.81.0-1ubuntu1.3", "curl": "7.81.0-1ubuntu1.3", "libcurl4": "7.81.0-1ubuntu1.3", "libcurl4-gnutls-dev": "7.81.0-1ubuntu1.3", "libcurl4-dbgsym": "7.81.0-1ubuntu1.3", "libcurl3-nss": "7.81.0-1ubuntu1.3", "libcurl4-doc": "7.81.0-1ubuntu1.3", "libcurl3-nss-dbgsym": "7.81.0-1ubuntu1.3", "libcurl3-gnutls": "7.81.0-1ubuntu1.3", "libcurl3-gnutls-dbgsym": "7.81.0-1ubuntu1.3", "libcurl4-openssl-dev": "7.81.0-1ubuntu1.3", "libcurl4-nss-dev": "7.81.0-1ubuntu1.3" } ] }