Ensure actions as another user are always logged

NiskaNivo 2Automatskalinux

Opis

sudo provides users with temporary elevated privileges to perform operations, either as the superuser or another user.

Kako se proverava

Metod provere: Komanda ljuske

shell

alt0() { o=$(bash -c 'awk '"'"'/^ *-a *always,exit/ &&/ -F *arch=b(32|64)/ &&(/ -F *auid!=unset/||/ -F *auid!=-1/||/ -F *auid!=4294967295/) &&(/ -C *euid!=uid/||/ -C *uid!=euid/) &&/ -S *execve/ &&(/ key= *[!-~]* *$/||/ -k *[!-~]* *$/)'"'"' /etc/audit/rules.d/*.rules' 2>&1); printf '%s\n' "$o" | tr -s ' \t' '  ' | sed 's/^ //;s/ $//' | grep -Fxq -- '-a always,exit -F arch=b64 -C euid!=uid -F auid!=unset -S execve -k user_emulation' || { echo step1: missing '-a always,exit -F arch=b64 -C euid!=uid -F auid!=unset -S ex'; return 1; }; printf '%s\n' "$o" | tr -s ' \t' '  ' | sed 's/^ //;s/ $//' | grep -Fxq -- '-a always,exit -F arch=b32 -C euid!=uid -F auid!=unset -S execve -k user_emulation' || { echo step1: missing '-a always,exit -F arch=b32 -C euid!=uid -F auid!=unset -S ex'; return 1; }; o=$(bash -c 'auditctl -l | awk '"'"'/^ *-a *always,exit/ &&/ -F *arch=b(32|64)/ &&(/ -F *auid!=unset/||/ -F *auid!=-1/||/ -F *auid!=4294967295/) &&(/ -C *euid!=uid/||/ -C *uid!=euid/) &&/ -S *execve/ &&(/ key= *[!-~]* *$/||/ -k *[!-~]* *$/)'"'"'' 2>&1); printf '%s\n' "$o" | tr -s ' \t' '  ' | sed 's/^ //;s/ $//' | grep -Fxq -- '-a always,exit -F arch=b64 -S execve -C uid!=euid -F auid!=-1 -F key=user_emulation' || { echo step2: missing '-a always,exit -F arch=b64 -S execve -C uid!=euid -F auid!=-'; return 1; }; printf '%s\n' "$o" | tr -s ' \t' '  ' | sed 's/^ //;s/ $//' | grep -Fxq -- '-a always,exit -F arch=b32 -S execve -C uid!=euid -F auid!=-1 -F key=user_emulation' || { echo step2: missing '-a always,exit -F arch=b32 -S execve -C uid!=euid -F auid!=-'; return 1; }; }; if alt0; then echo compliant; fi

Očekivani izlaz: compliant

Kako se ispravlja

Metod ispravke: Smernica ili zakrpa infrastrukture

Create audit rules Edit or create a file in the /etc/audit/rules.d/ directory, ending in .rules extension, with the relevant rules to monitor elevated privileges. Example: # printf " -a always,exit -F arch=b64 -C euid!=uid -F auid!=unset -S execve -k user_emulation -a always,exit -F arch=b32 -C euid!=uid -F auid!=unset -S execve -k user_emulation " >> /etc/audit/rules.d/50-user_emulation.rules Load audit rules Merge and load the rules into active configuration: # augenrules --load Check if reboot is required. # if [[ $(auditctl -s | grep "enabled") =~ "2" ]]; then printf "Reboot required to load rules\n"; fi

Svojstva

Operativni sistemi: ubuntu-20.04
Oznake: cis-convertedlinux
Referenca: CIS Ubuntu Linux 20.04 LTS Benchmark v3.0.0 - 6.3.3.2

Proverite ovaj računar

Pokrenite ovo na računaru za koji imate dozvolu za proveru. Skeniranje radi u režimu samo za čitanje.

shell

tmaegis scan --target linux --level 2