Updated by rbarlow about 7 years ago
In working on another security issue in this same script, I noticed that Pulp's pulp-qpid-ssl-cfg script uses bash's $RANDOM in unsafe ways. One of them is already being fixed as part of another CVE (the TMP directory is unsafe, CVE-2016-3696), but the other two uses are: 0) The default NSS DB password is a single value from $RANDOM, limiting it to the strings from 0 to 32768: https://github.com/pulp/pulp/blob/pulp-2.8.2-1/server/bin/pulp-qpid-ssl-cfg#L25 1) The certutil -z flag receives a "noise file". The script uses $RANDOM to populate a file with numbers to generate this file: https://github.com/pulp/pulp/blob/pulp-2.8.2-1/server/bin/pulp-qpid-ssl-cfg#L97-L105 Since $RANDOM is used in this way, the seed file ends up having low diversity since only 11 possible bytes appear in the file: ASCII 0-9 and newline. pwgen can be used to fix #0, but I'm not sure we want to depend on pwgen. One possibility is to avoid having a default password and force the user to provide one. Suggestions for this problem welcome. For #1 we should just grab 8 kB from /dev/urandom and call it a day.