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2017-01 Security Bulletin: Junos: Denial of Service vulnerability in RPD (CVE-2017-2302)

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Article ID: JSA10771 SECURITY_ADVISORIES Last Updated: 28 Feb 2019Version: 4.0
Product Affected:
This issue can affect any product or platform running Junos OS.
Problem:

On Junos OS devices where the BGP add-path feature is enabled with 'send' option or with both 'send' and 'receive' options, a network based attacker can cause the Junos OS rpd daemon to crash and restart. Repeated crashes of the rpd daemon can result in an extended denial of service condition.

Junos OS devices that do not have the BGP add-path feature enabled are not affected by this issue.

Junos OS devices that only have the 'receive' option with BGP add-path feature enabled are not affected by this issue.

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

No other Juniper Networks products or platforms are affected by this issue.

This issue has been assigned CVE-2017-2302.

Solution:

The following software releases have been updated to resolve this specific issue: Junos OS 12.1X46-D55, 12.1X47-D45, 12.3R12-S4, 12.3R13, 12.3X48-D35, 13.3R10, 14.1R8, 14.1X53-D40, 14.1X55-D35, 14.2R6, 15.1F2, 15.1R1, 15.1X49-D20 and all subsequent releases.

This issue is being tracked as PR 1027048 and is visible on the Customer Support website.

KB16765 - "In which releases are vulnerabilities fixed?" describes which release vulnerabilities are fixed as per our End of Engineering and End of Life support policies.

Workaround:

Disabling the BGP add-path feature completely, or disabling the 'send' option of BGP add-path will prevent the issue from occurring.
If BGP add-path feature is required then there are no known workarounds that can avoid the rpd crash.

Implementation:
How to obtain fixed software:
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:
2017-01-11: Initial release.
2017-01-13: Included 15.1F2 in the Solution as the issue is fixed in 15.1F2 and later F releases.
2019-02-28: Included 12.3R12-S4 in the Solution as the issue is fixed in 12.3R12-S4 and later S releases.
CVSS Score:
7.5 (CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/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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