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Fix dockerfile.security.missing-user rules #3448

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Fix dockerfile.security.missing-user rules #3448

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d486056
Fix dockerfile.security.missing-user rules
saghaulor Aug 2, 2024
e5e8d05
Merge branch 'develop' into fix_dockerfile.security.missing-user
0xDC0DE Aug 13, 2024
c787aa6
Merge branch 'develop' into fix_dockerfile.security.missing-user
0xDC0DE Sep 19, 2024
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4 changes: 2 additions & 2 deletions dockerfile/security/missing-user-entrypoint.dockerfile
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Original file line number Diff line number Diff line change
Expand Up @@ -9,6 +9,6 @@ RUN pip3 install semgrep
# ruleid: missing-user-entrypoint
ENTRYPOINT semgrep -f p/xss

# TODO: metavar bug
# ok: missing-user-entrypoint
# TODO: metavar ellipses bug, this should be a finding but is a false negative
# ruleid: missing-user-entrypoint
Comment on lines +12 to +13
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For failing testcases that are related to the engine instead of the rule, we also have todook and todoruleid. This allows our tests to pass for now, and the rule in its current state to be published. But also allows our developers to verify what the intended behaviour is. If they make an engine update that fixes this problem, they will update the test syntax.

Suggested change
# TODO: metavar ellipses bug, this should be a finding but is a false negative
# ruleid: missing-user-entrypoint
# TODO: metavar ellipses bug, this should be a finding but is a false negative
# todoruleid: missing-user-entrypoint

ENTRYPOINT ["semgrep", "--config", "localfile", "targets"]
5 changes: 3 additions & 2 deletions dockerfile/security/missing-user-entrypoint.fixed.dockerfile
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Expand Up @@ -7,9 +7,10 @@ RUN git clone https://github.com/returntocorp/semgrep
RUN pip3 install semgrep

# ruleid: missing-user-entrypoint
USER non-root
ENTRYPOINT semgrep -f p/xss

# TODO: metavar bug
# TODO: metavar ellipses bug
# ok: missing-user-entrypoint
ENTRYPOINT ["semgrep", "--config", "localfile", "targets"]
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Suggested change
# ok: missing-user-entrypoint
ENTRYPOINT ["semgrep", "--config", "localfile", "targets"]
# todoruleid: missing-user-entrypoint
ENTRYPOINT ["semgrep", "--config", "localfile", "targets"]


USER non-root
1 change: 1 addition & 0 deletions dockerfile/security/missing-user-entrypoint.yaml
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Expand Up @@ -4,6 +4,7 @@ rules:
- pattern: |
ENTRYPOINT $...VARS
- pattern-not-inside: |
...
USER $USER
...
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Not sure if this can be helped, but starting a pattern with an ellipses is very slow! (I think we have CI checks to not allow this)

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To avoid a starting ellipses, maybe we could do something like this?

    - pattern: |
        ENTRYPOINT $...VARS
    - pattern-not-inside:
        USER $USER
        ...
        ENTRYPOINT $...VARS
    - pattern-not-inside:
        CMD $...VARS
        ...
        ENTRYPOINT $USER

fix: |
Expand Down
7 changes: 2 additions & 5 deletions dockerfile/security/missing-user.dockerfile
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Expand Up @@ -6,12 +6,9 @@ FROM busybox
RUN git clone https://github.com/returntocorp/semgrep
RUN pip3 install semgrep

# ruleid: missing-user
CMD semgrep -f p/xss

# ruleid: missing-user
CMD semgrep --config localfile targets

# TODO: metavar ellipses bug
# ok: missing-user
# TODO: metavar ellipses bug, this should be a failure but is a false negative
# ruleid: missing-user
Comment on lines +12 to +13
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Suggested change
# TODO: metavar ellipses bug, this should be a failure but is a false negative
# ruleid: missing-user
# TODO: metavar ellipses bug, this should be a failure but is a false negative
# todoruleid: missing-user

CMD ["semgrep", "--version"]
7 changes: 2 additions & 5 deletions dockerfile/security/missing-user.fixed.dockerfile
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Original file line number Diff line number Diff line change
Expand Up @@ -6,14 +6,11 @@ FROM busybox
RUN git clone https://github.com/returntocorp/semgrep
RUN pip3 install semgrep

# ruleid: missing-user
USER non-root
CMD semgrep -f p/xss

# ruleid: missing-user
USER non-root
CMD semgrep --config localfile targets

# TODO: metavar ellipses bug
# ok: missing-user
CMD ["semgrep", "--version"]
CMD ["semgrep", "--config", "localfile", "targets"]
USER non-root
1 change: 1 addition & 0 deletions dockerfile/security/missing-user.yaml
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Original file line number Diff line number Diff line change
Expand Up @@ -4,6 +4,7 @@ rules:
- pattern: |
CMD $...VARS
- pattern-not-inside: |
...
USER $USER
...
Comment on lines +7 to 9
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To avoid a starting ellipses, maybe we could do something like this?

    - pattern: |
        CMD $...VARS
    - pattern-not-inside:
        USER $USER
        ...
        CMD $...VARS
    - pattern-not-inside:
        CMD $...VARS
        ...
        USER $USER

fix: |
Expand Down
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