Ensure TMOUT is configured

MédiaNível 2Automatizadaaix

Descrição

TMOUT and TIMEOUT are environmental setting that activate the timeout of a shell. The value is in seconds. TMOUT=n - Sets the shell timeout to n seconds. A setting of TMOUT=0, or unset TMOUT disables the automatic session timeout. readonly TMOUT- Both export and lock TMOUT environmental variable to it's present value, preventing unwanted modification during run-time. Audit: /etc/profile must set TMOUT and TIMEOUT to 1-900 seconds and export them (the CIS `readonly` check needs a login shell).

Como é verificado

Método de auditoria: Comando shell

shell

[ -r /etc/profile ] || exit 1; t=$(sed -n "s/^[[:blank:]]*TMOUT=\([0-9][0-9]*\).*/\1/p" /etc/profile | tail -n 1); u=$(sed -n "s/^[[:blank:]]*TIMEOUT=\([0-9][0-9]*\).*/\1/p" /etc/profile | tail -n 1); if [ -n "$t" ] && [ "$t" -ge 1 ] && [ "$t" -le 900 ] && [ -n "$u" ] && [ "$u" -ge 1 ] && [ "$u" -le 900 ] && grep -Eq "^[[:blank:]]*(export|readonly)[[:blank:]].*TMOUT" /etc/profile; then echo compliant; else echo "TMOUT=$t TIMEOUT=$u"; fi

Saída esperada: compliant

Como é corrigido

Método de correção: Orientação ou patch de infraestrutura

Review /etc/profile to verify that TMOUT and TIMEOUT are configured to: include a timeout of no more than 900 seconds to be readonly verify readonly statement is the last statement /usr/bin/egrep -e "TMOUT|TIMEOUT" /etc/profile This should return something similar to: # TMOUT=120 TMOUT=900 TIMEOUT=900 readonly TMOUT TIMEOUT If either setting is missing, and/or the readonly statement, add these to /etc/profile.

Propriedades

Sistemas operacionais: Qualquer
Tags: aixhardening
Referência: CIS IBM AIX 7 Benchmark v1.2.0 - 4.7.5 Ensure TMOUT is configured

Verificar este host

Execute isto em uma máquina que você tenha permissão para auditar. A varredura é somente leitura.

shell

tmaegis scan --target aix --level 2