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Status Not under consideration
Workspace Instana
Categories Agent
Created by Guest
Created on May 11, 2022

RELATED IDEAS

Secure files in /tmp/.instana

Original issue description:

Our security policy does not accept files with permission to write and execute inside the directory "/tmp", as INSTANA creates this type of file in "/tmp/.instana" we have several issues of vulnerability. We verified in the Instana documentation that these files cannot be removed, we also tried to change their permissions but every time the Instana agent is restarted it returns to the original permissions with (read, write and execute) we would like these files to keep only permission to read, even after restarting the Instana agent.

Additional information:

As per the IBM's ITSS for Linux Redhat v7/8 servers is not allowed to use word-writable files and it’s considered as a security deviation (Section IZ.1.8.22.4, "Protecting Resources - non-OSRs"). But, if you can remove the “write for all” from that file that won’t be a deviation (it might not to be really needed to have write access to that jar file for all users). Basically just 777 and 776 permissions are not allowed.


Also you can take a look at the sticky bit configuration for directories with world-writable access - it might be useful:


More details about the TechSpec for Linux in this link: https://ibm.box.com/s/sb017bgb8o8sdcwpr8uih96pzs46jfovMain Tech Spec web: https://w3.ibm.com/ocean/w3publisher/gts-technical-specifications/technical-specifications/sponsored


Slack Support Channel for TechSpec Linux: https://kyndryl.slack.com/archives/C028DSC60MC


  • Guest
    Reply
    |     Mar 3, 2023

    The files in /tmp/.instana created with 777 permissions cause failures in our Tenable compliance scans

    Ensure no world writable files exist

    CIS Red Hat Enterprise Linux 7 Benchmark v3.1.1

    Source: Tenable Security Center"6.1.10 Ensure no world writable files exist" : [FAILED]

    Unix-based systems support variable settings to control access to files. World writable files are the least secure. See the chmod(2) man page for more information.

    Rationale:

    Data in world-writable files can be modified and compromised by any user on the system. World writable files may also indicate an incorrectly written script or program that could potentially be the cause of a larger compromise to the system's integrity.

    Solution:
    Removing write access for the 'other' category ( chmod o-w ) is advisable, but always consult relevant vendor documentation to avoid breaking any application dependencies on a given file.

    See Also: https://workbench.cisecurity.org/files/3393

    Reference: 800-171|3.1.5,800-53|AC-6,CIS_Recommendation|6.1.10,CN-L3|7.1.3.2(b),CN-L3|7.1.3.2(g),CN-L3|8.1.4.2(d),CN-L3|8.1.10.6(a),CSCv7|5.1,CSCv8|3.3,CSCv8|4.1,CSF|PR.AC-4,CSF|PR.DS-5,ITSG-33|AC-6,LEVEL|1A,NESA|T5.1.1,NESA|T5.2.2,NESA|T5.4.1,NESA|T5.4.4,NESA|T5.4.5,NESA|T5.5.4,NESA|T5.6.1,NESA|T7.5.3,NIAv2|AM1,NIAv2|AM23f,NIAv2|SS13c,NIAv2|SS15c,PCI-DSSv3.1|7.1.2,PCI-DSSv3.2|7.1.2,QCSC-v1|5.2.2,QCSC-v1|6.2,QCSC-v1|13.2,SWIFT-CSCv1|5.1,TBA-FIISB|31.4.2,TBA-FIISB|31.4.3

  • Guest
    Reply
    |     Mar 1, 2023

    Tenable CIS Red Hat Enterprise Linux Benchmark security scans report failures for
    "6.1.10 Ensure no world writable files exist" : [FAILED]

    Rationale:

    Data in world-writable files can be modified and compromised by any user on the system. World writable files may also indicate an incorrectly written script or program that could potentially be the cause of a larger compromise to the system's integrity.


    See Also: https://workbench.cisecurity.org/files/3393

    Reference: 800-171|3.1.5,800-53|AC-6,CIS_Recommendation|6.1.10,CN-L3|7.1.3.2(b),CN-L3|7.1.3.2(g),CN-L3|8.1.4.2(d),CN-L3|8.1.10.6(a),CSCv7|5.1,CSCv8|3.3,CSCv8|4.1,CSF|PR.AC-4,CSF|PR.DS-5,ITSG-33|AC-6,LEVEL|1A,NESA|T5.1.1,NESA|T5.2.2,NESA|T5.4.1,NESA|T5.4.4,NESA|T5.4.5,NESA|T5.5.4,NESA|T5.6.1,NESA|T7.5.3,NIAv2|AM1,NIAv2|AM23f,NIAv2|SS13c,NIAv2|SS15c,PCI-DSSv3.1|7.1.2,PCI-DSSv3.2|7.1.2,QCSC-v1|5.2.2,QCSC-v1|6.2,QCSC-v1|13.2,SWIFT-CSCv1|5.1,TBA-FIISB|31.4.2,TBA-FIISB|31.4.3

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