CVE-2022-39224 — Vulnerability in arr-pm — CVE Details

### Impact Arbitrary shell execution is possible when using RPM::File#files and RPM::File#extract if the RPM contains a malicious "payload compressor" field. This vulnerability impacts the `extract` and `files` methods of the `RPM::File` class in the affected versions of this library. ### Patches Version 0.0.12 is available with a fix for these issues. ### Workarounds When using an affected version of this library (arr-pm), ensure any RPMs being processed contain valid/known payload compressor values. Such values include: gzip, bzip2, xz, zstd, and lzma. You can check the payload compressor field in an rpm by using the rpm command line tool. For example: ``` % rpm -qp example-1.0-1.x86_64.rpm --qf "%{PAYLOADCOMPRESSOR}\n" gzip ``` ### Impact on known dependent projects This library is used by [fpm](https://github.com/jordansissel/fpm). The vulnerability may impact fpm only when using the flag `-s rpm` or `--input-type rpm` to convert a malicious rpm to another format. It does not impact creating rpms. ### References * https://github.com/jordansissel/ruby-arr-pm/pull/14 * https://github.com/jordansissel/ruby-arr-pm/pull/15 ### Credit Thanks to @joernchen for reporting this problem and contributing to the resolution :) ### For more information If you have any questions or comments about this advisory: * Open an issue in [the arr-pm issue tracker](https://github.com/jordansissel/ruby-arr-pm/)