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2019-10 Security Bulletin: Junos OS: PKI key pairs are exported with insecure file permissions (CVE-2019-0073)

  [JSA10974] Show Article Properties


Product Affected:
This issue affects Junos OS 15.1X49, 17.3, 17.4, 18.1, 18.2, 18.3, 18.4.
Problem:

The PKI keys exported using the command "run request security pki key-pair export" on Junos OS may have insecure file permissions. This may allow another user on the Junos OS device with shell access to read them.

This issue affects:

Juniper Networks Junos OS

15.1X49 versions prior to 15.1X49-D180;

17.3 versions prior to 17.3R3-S7;

17.4 versions prior to 17.4R2-S8, 17.4R3;

18.1 versions prior to 18.1R3-S8;

18.2 versions prior to 18.2R3;

18.3 versions prior to 18.3R2;

18.4 versions prior to 18.4R2.

Juniper SIRT is not aware of any malicious exploitation of this vulnerability.

This issue was discovered during an external security research.

This issue has been assigned CVE-2019-0073.

Solution:

The following software releases have been updated to resolve this specific issue: 15.1X49-D180, 17.3R3-S7*, 17.4R2-S8, 17.4R3*, 18.1R3-S8*, 18.2R3, 18.3R2, 18.4R2, 19.1R1, and all subsequent releases.

*pending release.

This issue is being tracked as PR 1419515 which is visible on the Customer Support website.

Note: Juniper SIRT's policy is not to evaluate releases which are beyond End of Engineering (EOE) or End of Life (EOL).

Workaround:
Do not use directories readable by other users (such as /tmp) while exporting PKI keys.

Limit access to the Junos OS device to only trusted administrators.

Implementation:
Software Releases, patches and updates are available at https://www.juniper.net/support/downloads/.
Modification History:
2019-10-09: Initial Publication.
Related Links:
CVSS Score:
6.6 (CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:N)
Severity Level:
Medium
Severity Assessment:
Information for how Juniper Networks uses CVSS can be found at KB 16446 "Common Vulnerability Scoring System (CVSS) and Juniper's Security Advisories."
Acknowledgements:
The Juniper SIRT would like to would like to acknowledge and thank,
  • Torsten Lange of IT-Dienstleistungszentrum Berlin