UltraJSON (aka ujson) through 5.1.0 has a stack-based buffer overflow in Buffer_AppendIndentUnchecked (called from encode). Exploitation can, for example, use a large amount of indentation.
{ "availability": "Available with Ubuntu Pro: https://ubuntu.com/pro", "ubuntu_priority": "medium", "binaries": [ { "binary_version": "1.33-1ubuntu0.1~esm2", "binary_name": "python-ujson" }, { "binary_version": "1.33-1ubuntu0.1~esm2", "binary_name": "python-ujson-dbg" }, { "binary_version": "1.33-1ubuntu0.1~esm2", "binary_name": "python3-ujson" }, { "binary_version": "1.33-1ubuntu0.1~esm2", "binary_name": "python3-ujson-dbg" } ] }
{ "availability": "Available with Ubuntu Pro: https://ubuntu.com/pro", "ubuntu_priority": "medium", "binaries": [ { "binary_version": "1.35-2ubuntu0.1~esm1", "binary_name": "python-ujson" }, { "binary_version": "1.35-2ubuntu0.1~esm1", "binary_name": "python-ujson-dbg" }, { "binary_version": "1.35-2ubuntu0.1~esm1", "binary_name": "python3-ujson" }, { "binary_version": "1.35-2ubuntu0.1~esm1", "binary_name": "python3-ujson-dbg" } ] }