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2020-07 Security Bulletin: Junos OS: Receipt of certain genuine BGP packets from any BGP Speaker causes RPD to crash. (CVE-2020-1640)

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Article ID: JSA11024 SECURITY_ADVISORIES Last Updated: 10 Jul 2020Version: 5.0
Product Affected:
This issue affects Junos OS 16.1, 16.2, 17.1, 17.2, 17.3, 17.4, 18.1, 18.2, 18.2X75, 18.3, 18.4, 19.1, 19.2, 19.3, 19.4, 20.1.
Problem:

An improper use of a validation framework when processing incoming genuine BGP packets within Juniper Networks RPD (routing protocols process) daemon allows an attacker to crash RPD thereby causing a Denial of Service (DoS) condition. This framework requires these packets to be passed. By continuously sending any of these types of formatted genuine packets, an attacker can repeatedly crash the RPD process causing a sustained Denial of Service. 

This issue can be initiated or propagated through eBGP and iBGP and can impact devices in either modes of use as long as the devices are configured to support the compromised framework and a BGP path is activated or active.

This issue affects:

Juniper Networks Junos OS

16.1 versions 16.1R7-S6 and later versions prior to 16.1R7-S8;

17.3 versions 17.3R2-S5, 17.3R3-S6 and later versions prior to 17.3R3-S8;

17.4 versions 17.4R2-S7, 17.4R3 and later versions prior to 17.4R2-S11, 17.4R3-S2;

18.1 versions 18.1R3-S7 and later versions prior to 18.1R3-S10;

18.2 versions 18.2R2-S6, 18.2R3-S2 and later versions prior to 18.2R2-S7, 18.2R3-S5;

18.2X75 versions 18.2X75-D12, 18.2X75-D32, 18.2X75-D33, 18.2X75-D51, 18.2X75-D60, 18.2X75-D411, 18.2X75-D420 and later versions prior to 18.2X75-D32, 18.2X75-D33, 18.2X75-D420, 18.2X75-D52, 18.2X75-D60, 18.2X75-D65, 18.2X75-D70;(*1)

18.3 versions 18.3R1-S6, 18.3R2-S3, 18.3R3 and later versions prior to 18.3R2-S4, 18.3R3-S2;

18.4 versions 18.4R1-S5, 18.4R2-S4, 18.4R3 and later versions prior to 18.4R1-S7, 18.4R2-S5, 18.4R3-S3;

19.1 versions 19.1R1-S3, 19.1R2 and later versions prior to 19.1R1-S5, 19.1R2-S2, 19.1R3-S2;

19.2 versions 19.2R1-S2, 19.2R2 and later versions prior to 19.2R1-S5, 19.2R2, 19.2R3;

19.3 versions prior to 19.3R2-S3, 19.3R3;

19.4 versions prior to 19.4R1-S2, 19.4R2, 19.4R3;

20.1 versions prior to 20.1R1-S1, 20.1R2.

This issue does not affect Junos OS prior to 16.1R1.

This issue affects IPv4 and IPv6 traffic.

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

This issue was seen during production usage.

This issue has been assigned CVE-2020-1640.

Solution:

 The following software releases have been updated to resolve this specific issue: 16.1R7-S8, 17.3R3-S8, 17.4R2-S11, 17.4R3-S2, 18.1R3-S10, 18.2R2-S7, 18.2R3-S5, 18.2X75-D32, 18.2X75-D33, 18.2X75-D420, 18.2X75-D52, 18.2X75-D60, 18.2X75-D65, 18.2X75-D70;(*1), 18.3R2-S4, 18.3R3-S2, 18.4R1-S7, 18.4R2-S5, 18.4R3-S3, 19.1R1-S5, 19.1R2-S2, 19.1R3-S2, 19.2R1-S5, 19.2R2, 19.2R3, 19.3R2-S3, 19.3R3, 19.4R1-S2, 19.4R2, 19.4R3, 20.1R1-S1, 20.1R2, 20.2R1, and subsequent releases.

*1: For 18.2X75 customers. Please speak with your account manager regarding applicable respin release identifiers for affected-to to affected-from, and resolved-in release targets.

This issue is being tracked as 1497721.

Workaround:
There are no available workarounds for this issue.
Implementation:
Software Releases, patches and updates are available at https://www.juniper.net/support/downloads/.        
Modification History:
2020-07-08: Initial Publication.
2020-07-10: Removed *2 errata for pending publication 18.4R3-S3 
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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