Debian thumbor: Thumbor is an open-source photo thumbnail service by globo.com. Prior to 7.8.0, …

Thumbor is an open-source photo thumbnail service by globo.com. Prior to 7.8.0, the convolution filter regular expression performs exponential backtracking on crafted repeated numeric input, allowing a URL request to exhaust processing time. This issue is fixed in 7.8.0.