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2019-10 Security Bulletin: Junos OS: A malformed IPv4 packet received by Junos in an NG-mVPN scenario may cause the routing protocol daemon (rpd) process to core (CVE-2019-0066)

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Article ID: JSA10965 SECURITY_ADVISORIES Last Updated: 09 Oct 2019Version: 3.0
Product Affected:
This issue affects Junos OS 15.1, 15.1X49, 15.1X53, 16.1, 16.2, 17.1, 17.2, 17.3.
Problem:
An unexpected status return value weakness in the Next-Generation Multicast VPN (NG-mVPN) service of Juniper Networks Junos OS allows attacker to cause a Denial of Service (DoS) condition and core the routing protocol daemon (rpd) process when a specific malformed IPv4 packet is received by the device running BGP.

This malformed packet can be crafted and sent to a victim device including when forwarded directly through a device receiving such a malformed packet, but not if the malformed packet is first de-encapsulated from an encapsulated format by a receiving device.

Continued receipt of the malformed packet will result in a sustained Denial of Service condition.

This issue affects:

Juniper Networks Junos OS

15.1 versions prior to 15.1F6-S12, 15.1R7-S2;

15.1X49 versions prior to 15.1X49-D150 on SRX Series;

15.1X53 versions prior to 15.1X53-D68, 15.1X53-D235, 15.1X53-D495, 15.1X53-D590;

16.1 versions prior to 16.1R3-S10, 16.1R4-S12, 16.1R6-S6, 16.1R7-S2;

16.2 versions prior to 16.2R2-S7;

17.1 versions prior to 17.1R2-S9, 17.1R3;

17.2 versions prior to 17.2R1-S7, 17.2R2-S6, 17.2R3;

17.3 versions prior to 17.3R2-S4, 17.3R3.

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-2019-0066.

Solution:
The following software releases have been updated to resolve this specific issue: 15.1F6-S12, 15.1R7-S2, 15.1X49-D150, 15.1X53-D68, 15.1X53-D235, 15.1X53-D495, 15.1X53-D590, 16.1R3-S10, 16.1R4-S12, 16.1R6-S6, 16.1R7-S2, 16.2R2-S7, 17.1R2-S9, 17.1R3, 17.2R1-S7, 17.2R2-S6, 17.2R3, 17.3R2-S4, 17.3R3, 17.4R1, and all subsequent releases.

This issue is being tracked as PR 1309982 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:
Discontinue use of BGP services if not needed. Otherwise, there are no viable workarounds for this issue.
Implementation:
Software Releases, patches and updates are available at https://www.juniper.net/support/downloads/.
Modification History:
2019-10-09: Initial Publication.
CVSS Score:
7.5 (CVSS:3.1/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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