RHEL includes several cryptographic components who's security doesn't remain constant over time. Algorithms such as (cryptographic) hashing and encryption typically have a lifetime after which they are considered either too risky to use or plain insecure. That would mean we need to phase out such algorithms from the default settings, or completely disable if they could cause irreparable issue.
This bug is about removing by default algorithms that are deemed unsafe by the IETF IPSECME Working group (MUST NOT). Algorithms that are in SHOULD NOT state will be kept but removed from the default set.
The relevant (at the moment) drafts are:
currently both drafts only contain 1DES as MUST NOT, which has never been supported since 1995. It further has DH1024 and 3DES as new SHOULD NOT's. Since both are still safe and in common use, I would not change it this late into RHEL6. These changes are also not currently scheduled for RHEL7.3 but will only be done in RHEL-7.4
I would suggest closing this bug
Feel free to close the bug if you think that no action is necessary.