If Network Security Services (NSS) is being used by SLEM 5 it must prohibit the use of cached authentications after one day.
Severity | Group ID | Group Title | Version | Rule ID | Date | STIG Version |
|---|---|---|---|---|---|---|
| medium | V-261399 | SRG-OS-000383-GPOS-00166 | SLEM-05-631010 | SV-261399r996617_rule | 2026-02-10 | 1 |
Description
If cached authentication information is out of date, the validity of the authentication information may be questionable.
ℹ️ Check
If NSS is used by SLEM 5, verify it prohibits the use of cached authentications after one day with the following command:
Note: If NSS is not used on the operating system, this is not applicable.
> sudo grep -i "memcache_timeout" /etc/sssd/sssd.conf
memcache_timeout = 86400
If "memcache_timeout" has a value greater than "86400", the line is commented out, or the line is missing, this is a finding.
✔️ Fix
Configure NSS, if used by SLEM 5, to prohibit the use of cached authentications after one day.
Add or modify the following line in the "/etc/sssd/sssd.conf" file, below the line "[nss]":
memcache_timeout = 86400