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2019-10 Security Bulletin: Junos OS: SRX Series: A weakness in the Veriexec subsystem may allow privilege escalation. (CVE-2019-0058)

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Article ID: JSA10956 SECURITY_ADVISORIES Last Updated: 09 Oct 2019Version: 2.0
Product Affected:
This issue affects Junos OS 12.3X48. Affected platforms: SRX Series.
Problem:
A vulnerability in the Veriexec subsystem of Juniper Networks Junos OS allowing an attacker to fully compromise the host system. A local authenticated user can elevate privileges to gain full control of the system even if they are specifically denied access to perform certain actions.

This issue affects:

Juniper Networks Junos OS:

12.3X48 versions prior to 12.3X48-D80 on SRX Series.

This requires a local authenticated user to have shell privilege.

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

This issue was found during internal product security testing or research.

This issue has been assigned CVE-2019-0058.

Solution:
The following software releases have been updated to resolve this specific issue: Junos OS: 12.3X48-D80 and all subsequent releases.

This issue is being tracked as PR 975878 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:
To reduce the risk of exploitation of this vulnerability, customers should limit access to the Junos shell to only trusted administrators and limit their actions to previously reviewed and agreed-upon commands and command arguments as part of a structured change management workflow. Shell commands which are run should be logged and reviewed as part of standard security practices.
 
Implementation:
Software Releases, patches and updates are available at https://www.juniper.net/support/downloads/.
Modification History:
2019-10-09: Initial Publication.
CVSS Score:
7.8 (CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H)
Severity Level:
High
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."

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