Ensure sshd ReKeyLimit is configured

MoyenneNiveau 1Automatiséeaix

Description

This variable specifies the maximum amount of data that may be transmitted before the session key is renegotiated, optionally followed by a maximum amount of time that may pass before the session key is renegotiated. This recommendation is based on the guidelines outlined in Chapter 9 in [RFC4253], i.e. the recommendation is to release/renew Session keys after one hour or after the transfer of one gigabyte (depending on whichever comes first). Audit: evaluates the effective configuration from `sshd -T` (Match blocks must be reviewed separately).

Méthode de vérification

Méthode d'audit: Commande shell

shell

command -v sshd >/dev/null 2>&1 || exit 1; out=$(sshd -T 2>/dev/null) || exit 1; r=compliant; for p in '^rekeylimit[[:blank:]]+1073741824[[:blank:]]+3600$'; do printf '%s\n' "$out" | grep -Eiq -- "$p" || r="not matched: $p"; done; echo "$r"

Sortie attendue: compliant

Méthode de correction

Méthode de correction: Recommandation ou correctif d'infrastructure

Edit the /etc/ssh/sshd_config file to set the parameter as follows: RekeyLimit 1G 3600

Propriétés

Systèmes d'exploitation: Tous
Étiquettes: aixssh
Référence: CIS IBM AIX 7 Benchmark v1.2.0 - 4.6.3.17 Ensure sshd ReKeyLimit is configured

Vérifier cet hôte

Exécutez cette commande sur une machine que vous êtes autorisé à auditer. L'analyse est en lecture seule.

shell

tmaegis scan --target aix