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16 October 2020

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             AUSCERT External Security Bulletin Redistribution

  JSA11050 - 2020-10 Security Bulletin: Junos OS: SRX Series: An attacker
       sending spoofed packets to IPSec peers may cause a Denial of
                         Service. (CVE-2020-1657)
                              16 October 2020


        AusCERT Security Bulletin Summary

Product:           Junos OS
                   SRX Series
Publisher:         Juniper Networks
Operating System:  Juniper
Impact/Access:     Denial of Service -- Remote/Unauthenticated
Resolution:        Patch/Upgrade
CVE Names:         CVE-2020-1657  

Original Bulletin: 

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2020-10 Security Bulletin: Junos OS: SRX Series: An attacker sending spoofed packets to IPSec peers may cause a Denial of Service. (CVE-2020-1657)

Article ID  : JSA11050
Last Updated: 14 Oct 2020
Version     : 1.0

Product Affected:
This issue affects Junos OS 12.3X48, 15.1X49, 17.4, 18.1, 18.2, 18.3, 18.4,
19.1. Affected platforms: SRX Series.


On SRX Series devices, a vulnerability in the key-management-daemon (kmd)
daemon of Juniper Networks Junos OS allows an attacker to spoof packets
targeted to IPSec peers before a security association (SA) is established
thereby causing a failure to set up the IPSec channel.

Sustained receipt of these spoofed packets can cause a sustained Denial of
Service (DoS) condition.

This issue affects IPv4 and IPv6 implementations.

This issue affects Juniper Networks Junos OS on SRX Series:

  o 12.3X48 versions prior to 12.3X48-D90;
  o 15.1X49 versions prior to 15.1X49-D190;
  o 17.4 versions prior to 17.4R2-S9, 17.4R3;
  o 18.1 versions prior to 18.1R3-S9;
  o 18.2 versions prior to 18.2R3;
  o 18.3 versions prior to 18.3R1-S7, 18.3R2-S3, 18.3R3;
  o 18.4 versions prior to 18.4R1-S6, 18.4R2-S3, 18.4R3;
  o 19.1 versions prior to 19.1R1-S4, 19.1R2.

This issue does not affect 12.3 or 15.1 releases which are non-SRX Series

The example of minimum config stanza affected by this issue:

[security ipsec]

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-2020-1657 .


The following software releases have been updated to resolve this specific
issue: 12.3X48-D90, 15.1X49-D190, 17.4R2-S9, 17.4R3, 18.1R3-S9, 18.2R3,
18.3R1-S7, 18.3R2-S3, 18.3R3, 18.4R1-S6, 18.4R2-S3, 18.4R3, 19.1R1-S4, 19.1R2,
19.2R1, and all subsequent releases.

This issue is being tracked as 977435 .


There are no known workarounds for this issue.

Software releases or updates are available for download at https://
www.juniper.net/support/downloads/ .

Modification History:
2020-10-14: 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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