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secure-code-practice
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python
/
dynamic-code-exec.py
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main
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secure-code-practice
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python
/
dynamic-code-exec.py
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'''
취약점 개요
코드를 동적으로 실행하는 응용 프로그램은 코드를 구성하는 데 사용되는 모든 외부 제공 값을 무효화해야 합니다.
그렇게 하지 않으면 공격자가 임의의 코드를 실행할 수 있습니다.
이는 민감한 정보에 대한 액세스/수정 또는 전체 시스템 액세스 권한 획득과 같은 광범위한 심각한 공격을 가능하게 할 수 있습니다.
완화 전략은 허용된 값의 화이트리스트 지정 또는 안전한 유형으로의 캐스팅을 기반으로 해야 합니다.
'''
# Noncompliant Code Example
from
flask
import
request
@
app
.
route
(
'/'
)
def
index
():
module
=
request
.
args
.
get
(
"module"
)
exec
(
"import urllib%s as urllib"
%
module
)
# Noncompliant
# Compliant Solution
from
flask
import
request
@
app
.
route
(
'/'
)
def
index
():
module
=
request
.
args
.
get
(
"module"
)
exec
(
"import urllib%d as urllib"
%
int
(
module
))
# Compliant; module is safely cast to an integer
You can’t perform that action at this time.