An issue was discovered in RubyGems 2.6 and later through 3.0.2. Gem::GemcutterUtilities#with_response may output the API response to stdout as it is. Therefore, if the API side modifies the response, escape sequence injection may occur.
{
"availability": "No subscription required",
"binaries": [
{
"binary_name": "libruby1.9.1",
"binary_version": "1.9.3.484-2ubuntu1.14"
},
{
"binary_name": "libtcltk-ruby1.9.1",
"binary_version": "1.9.3.484-2ubuntu1.14"
},
{
"binary_name": "ri1.9.1",
"binary_version": "1.9.3.484-2ubuntu1.14"
},
{
"binary_name": "ruby1.9.1",
"binary_version": "1.9.3.484-2ubuntu1.14"
},
{
"binary_name": "ruby1.9.1-dev",
"binary_version": "1.9.3.484-2ubuntu1.14"
},
{
"binary_name": "ruby1.9.1-examples",
"binary_version": "1.9.3.484-2ubuntu1.14"
},
{
"binary_name": "ruby1.9.1-full",
"binary_version": "1.9.3.484-2ubuntu1.14"
},
{
"binary_name": "ruby1.9.3",
"binary_version": "1.9.3.484-2ubuntu1.14"
}
]
}{
"availability": "No subscription required",
"binaries": [
{
"binary_name": "libruby2.0",
"binary_version": "2.0.0.484-1ubuntu2.13"
},
{
"binary_name": "ruby2.0",
"binary_version": "2.0.0.484-1ubuntu2.13"
},
{
"binary_name": "ruby2.0-dev",
"binary_version": "2.0.0.484-1ubuntu2.13"
},
{
"binary_name": "ruby2.0-tcltk",
"binary_version": "2.0.0.484-1ubuntu2.13"
}
]
}{
"availability": "No subscription required",
"binaries": [
{
"binary_name": "libruby2.3",
"binary_version": "2.3.1-2~16.04.12"
},
{
"binary_name": "ruby2.3",
"binary_version": "2.3.1-2~16.04.12"
},
{
"binary_name": "ruby2.3-dev",
"binary_version": "2.3.1-2~16.04.12"
},
{
"binary_name": "ruby2.3-tcltk",
"binary_version": "2.3.1-2~16.04.12"
}
]
}