Race condition vulnerability lies in GNU Parallel's way of creating temporary files while at the same time trying to remove these ASAP, so if GNU Parallel is stopped, there will be no temporary files to clean up. A local attacker can exploit this issue to overwrite a file with one byte file. If an attacker sees the temporary file being created, and then removed, he has 15 ms to create a symlink with the same name to a file owned by the user. And if the file is then being recreated this will overwrite the user's file. GNU Parallel is vulnerable when using --pipe, --tmux, --cat, --fifo, or --compress. This issue was partly fixed in 20150422 and fully fixed in 20150522. External Reference: https://lists.gnu.org/archive/html/parallel/2015-04/msg00045.html
Created parallel tracking bugs for this issue: Affects: fedora-all [bug 1320958]
parallel-20160222-1.fc22 has been pushed to the Fedora 22 stable repository. If problems still persist, please make note of it in this bug report.
parallel-20160222-1.fc23 has been pushed to the Fedora 23 stable repository. If problems still persist, please make note of it in this bug report.
parallel-20160222-1.fc24 has been pushed to the Fedora 24 stable repository. If problems still persist, please make note of it in this bug report.
This CVE Bugzilla entry is for community support informational purposes only as it does not affect a package in a commercially supported Red Hat product. Refer to the dependent bugs for status of those individual community products.