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             AUSCERT External Security Bulletin Redistribution

JSA11024 - 2020-07 Security Bulletin: Junos OS: Receipt of certain genuine
   BGP packets from any BGP Speaker causes RPD to crash. (CVE-2020-1640)
                                9 July 2020


        AusCERT Security Bulletin Summary

Product:           Junos OS
Publisher:         Juniper Networks
Operating System:  Juniper
Impact/Access:     Denial of Service -- Remote/Unauthenticated
Resolution:        Patch/Upgrade
CVE Names:         CVE-2020-1640  

Original Bulletin: 

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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)

Article ID  : JSA11024
Last Updated: 08 Jul 2020
Version     : 4.0

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.

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,

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,

18.2X75 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,

18.3 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(*2);

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,

19.3 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 .


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(*2), 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.

*2: Pending publication.

This issue is being tracked as 1497721 .

There are no available workarounds for this issue.
Software Releases, patches and updates are available at https://www.juniper.net
/support/downloads/ .
Modification History:

2020-07-08: 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:
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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