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2017-07 Security Bulletin: Junos OS: Local XML Injection through CLI command can lead to privilege escalation (CVE-2017-10603)

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Article ID: JSA10805 SECURITY_ADVISORIES Last Updated: 12 Jul 2017Version: 1.0
Product Affected:
This issue affects Juniper Networks Junos OS 15.1X53 prior to 15.1X53-D47; 15.1 prior to 15.1R3.
Problem:

An XML injection vulnerability in Junos OS CLI can allow a locally authenticated user to elevate privileges and run arbitrary commands as the root user.

This issue was found during internal product security testing.

Affected releases are Juniper Networks Junos OS 15.1X53 prior to 15.1X53-D47, 15.1 prior to 15.1R3.

Junos versions prior to 15.1 are not affected. No other Juniper Networks products or platforms are affected by this issue.

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

This issue has been assigned CVE-2017-10603.

Solution:

The following software releases have been updated to resolve this specific issue: Junos OS 15.1X53-D47, 15.1R3, and all subsequent releases.

This issue is being tracked as PR 1091037 and is visible on the Customer Support website.

Workaround:

There is no direct workaround to completely eliminate the risk of this vulnerability.

Use access lists or firewall filters to limit access to the router's CLI only from trusted hosts. Restrict access to the CLI to only highly trusted administrators.

Implementation:
Security vulnerabilities in Junos are fixed in the next available Maintenance Release of each supported Junos version. In some cases, a Maintenance Release is not planned to be available in an appropriate time-frame. For these cases, Service Releases are made available in order to be more timely. Security Advisory and Security Notices will indicate which Maintenance and Service Releases contain fixes for the issues described. Upon request to JTAC, customers will be provided download instructions for a Service Release. Although Juniper does not provide formal Release Note documentation for a Service Release, a list of "PRs fixed" can be provided on request.
Modification History:
  • 2017-07-12: Initial Publication.
CVSS Score:
7 (CVSS:3.0/AV:L/AC:H/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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