CVE-2020-1629 | Junos OS: A race condition vulnerability may cause RPD daemon to crash when processing a BGP NOTIFICATION message.

A race condition vulnerability on Juniper Network Junos OS devices may cause the routing protocol daemon (RPD) process to crash and restart while processing a BGP NOTIFICATION message. This issue affects Juniper Networks Junos OS: 16.1 versions prior to 16.1R7-S6; 16.2 versions prior to 16.2R2-S11; 17.1 versions prior to 17.1R2-S11, 17.1R3-S1; 17.2 versions prior to 17.2R1-S9, 17.2R3-S3; 17.2 version 17.2R2 and later versions; 17.2X75 versions prior to 17.2X75-D105, 17.2X75-D110; 17.3 versions prior to 17.3R2-S5, 17.3R3-S6; 17.4 versions prior to 17.4R2-S7, 17.4R3; 18.1 versions prior to 18.1R3-S8; 18.2 versions prior to 18.2R3-S3; 18.2X75 versions prior to 18.2X75-D410, 18.2X75-D420, 18.2X75-D50, 18.2X75-D60; 18.3 versions prior to 18.3R1-S5, 18.3R2-S2, 18.3R3; 18.4 versions prior to 18.4R2-S2, 18.4R3; 19.1 versions prior to 19.1R1-S2, 19.1R2; 19.2 versions prior to 19.2R1-S4, 19.2R2. This issue does not affect Juniper Networks Junos OS prior to version 16.1R1.

Published: 2020-04-08 Last update: 2024-11-21 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2020-1629 is rated Moderate Risk (40.3/100): CVSS Medium severity, with low exploitation likelihood (EPSS 0.67%). Review affected assets and schedule remediation.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2020-1629

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-06-15 0.31% 0.67% +0.35%
2 2025-11-21 0.21% 0.31% +0.10%
3 2025-11-18 — 0.21% —

Full EPSS history (11 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2020-1629

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
5.9 3.1 MEDIUM
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:H)
Even with access, the exploit needs extra luck, timing, or a fussy environment to actually work.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:N)
Doesn’t really leak secrets in a meaningful way.
Integrity (I:N)
Data isn’t meaningfully altered or forged.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 2.2 3.6 [email protected]
5.9 3.1 MEDIUM
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:H)
Even with access, the exploit needs extra luck, timing, or a fussy environment to actually work.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:N)
Doesn’t really leak secrets in a meaningful way.
Integrity (I:N)
Data isn’t meaningfully altered or forged.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 2.2 3.6 [email protected]
4.3 2.0 MEDIUM
AV:N/AC:M/Au:N/C:N/I:N/A:P Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:M)
Exploitation needs some favorable conditions, but not exceptional ones.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:N)
No confidentiality impact.
Integrity impact (I:N)
No integrity impact.
Availability impact (A:P)
Partial availability impact.
 8.6 2.9 [email protected]

Weakness enumeration for CVE-2020-1629

Affected software / configurations for CVE-2020-1629

Vendor Product Version Raw CPE
juniper junos 16.1 cpe:2.3:o:juniper:junos:16.1:-:*:*:*:*:*:*
juniper junos 16.1 cpe:2.3:o:juniper:junos:16.1:r1:*:*:*:*:*:*
juniper junos 16.1 cpe:2.3:o:juniper:junos:16.1:r2:*:*:*:*:*:*
juniper junos 16.1 cpe:2.3:o:juniper:junos:16.1:r3:*:*:*:*:*:*
juniper junos 16.1 cpe:2.3:o:juniper:junos:16.1:r3-s10:*:*:*:*:*:*
juniper junos 16.1 cpe:2.3:o:juniper:junos:16.1:r3-s11:*:*:*:*:*:*
juniper junos 16.1 cpe:2.3:o:juniper:junos:16.1:r4:*:*:*:*:*:*
juniper junos 16.1 cpe:2.3:o:juniper:junos:16.1:r4-s12:*:*:*:*:*:*
juniper junos 16.1 cpe:2.3:o:juniper:junos:16.1:r4-s2:*:*:*:*:*:*
juniper junos 16.1 cpe:2.3:o:juniper:junos:16.1:r4-s3:*:*:*:*:*:*
juniper junos 16.1 cpe:2.3:o:juniper:junos:16.1:r4-s4:*:*:*:*:*:*
juniper junos 16.1 cpe:2.3:o:juniper:junos:16.1:r4-s6:*:*:*:*:*:*
juniper junos 16.1 cpe:2.3:o:juniper:junos:16.1:r5:*:*:*:*:*:*
juniper junos 16.1 cpe:2.3:o:juniper:junos:16.1:r5-s4:*:*:*:*:*:*
juniper junos 16.1 cpe:2.3:o:juniper:junos:16.1:r6-s1:*:*:*:*:*:*
juniper junos 16.1 cpe:2.3:o:juniper:junos:16.1:r6-s6:*:*:*:*:*:*
juniper junos 16.1 cpe:2.3:o:juniper:junos:16.1:r7:*:*:*:*:*:*
juniper junos 16.1 cpe:2.3:o:juniper:junos:16.1:r7-s2:*:*:*:*:*:*
juniper junos 16.1 cpe:2.3:o:juniper:junos:16.1:r7-s3:*:*:*:*:*:*
juniper junos 16.1 cpe:2.3:o:juniper:junos:16.1:r7-s4:*:*:*:*:*:*
juniper junos 16.1 cpe:2.3:o:juniper:junos:16.1:r7-s5:*:*:*:*:*:*
juniper junos 16.2 cpe:2.3:o:juniper:junos:16.2:-:*:*:*:*:*:*
juniper junos 16.2 cpe:2.3:o:juniper:junos:16.2:r1:*:*:*:*:*:*
juniper junos 16.2 cpe:2.3:o:juniper:junos:16.2:r2:*:*:*:*:*:*
juniper junos 16.2 cpe:2.3:o:juniper:junos:16.2:r2-s1:*:*:*:*:*:*
juniper junos 16.2 cpe:2.3:o:juniper:junos:16.2:r2-s10:*:*:*:*:*:*
juniper junos 16.2 cpe:2.3:o:juniper:junos:16.2:r2-s2:*:*:*:*:*:*
juniper junos 16.2 cpe:2.3:o:juniper:junos:16.2:r2-s5:*:*:*:*:*:*
juniper junos 16.2 cpe:2.3:o:juniper:junos:16.2:r2-s6:*:*:*:*:*:*
juniper junos 16.2 cpe:2.3:o:juniper:junos:16.2:r2-s7:*:*:*:*:*:*
juniper junos 16.2 cpe:2.3:o:juniper:junos:16.2:r2-s8:*:*:*:*:*:*
juniper junos 16.2 cpe:2.3:o:juniper:junos:16.2:r2-s9:*:*:*:*:*:*
juniper junos 17.1 cpe:2.3:o:juniper:junos:17.1:-:*:*:*:*:*:*
juniper junos 17.1 cpe:2.3:o:juniper:junos:17.1:r1:*:*:*:*:*:*
juniper junos 17.1 cpe:2.3:o:juniper:junos:17.1:r2:*:*:*:*:*:*
juniper junos 17.1 cpe:2.3:o:juniper:junos:17.1:r2-s1:*:*:*:*:*:*
juniper junos 17.1 cpe:2.3:o:juniper:junos:17.1:r2-s10:*:*:*:*:*:*
juniper junos 17.1 cpe:2.3:o:juniper:junos:17.1:r2-s2:*:*:*:*:*:*
juniper junos 17.1 cpe:2.3:o:juniper:junos:17.1:r2-s3:*:*:*:*:*:*
juniper junos 17.1 cpe:2.3:o:juniper:junos:17.1:r2-s4:*:*:*:*:*:*
juniper junos 17.1 cpe:2.3:o:juniper:junos:17.1:r2-s5:*:*:*:*:*:*
juniper junos 17.1 cpe:2.3:o:juniper:junos:17.1:r2-s6:*:*:*:*:*:*
juniper junos 17.1 cpe:2.3:o:juniper:junos:17.1:r2-s7:*:*:*:*:*:*
juniper junos 17.1 cpe:2.3:o:juniper:junos:17.1:r2-s8:*:*:*:*:*:*
juniper junos 17.1 cpe:2.3:o:juniper:junos:17.1:r2-s9:*:*:*:*:*:*
juniper junos 17.1 cpe:2.3:o:juniper:junos:17.1:r3:*:*:*:*:*:*
juniper junos 17.2 cpe:2.3:o:juniper:junos:17.2:-:*:*:*:*:*:*
juniper junos 17.2 cpe:2.3:o:juniper:junos:17.2:r1:*:*:*:*:*:*
juniper junos 17.2 cpe:2.3:o:juniper:junos:17.2:r1-s1:*:*:*:*:*:*
juniper junos 17.2 cpe:2.3:o:juniper:junos:17.2:r1-s2:*:*:*:*:*:*
juniper junos 17.2 cpe:2.3:o:juniper:junos:17.2:r1-s3:*:*:*:*:*:*
juniper junos 17.2 cpe:2.3:o:juniper:junos:17.2:r1-s4:*:*:*:*:*:*
juniper junos 17.2 cpe:2.3:o:juniper:junos:17.2:r1-s5:*:*:*:*:*:*
juniper junos 17.2 cpe:2.3:o:juniper:junos:17.2:r1-s7:*:*:*:*:*:*
juniper junos 17.2 cpe:2.3:o:juniper:junos:17.2:r1-s8:*:*:*:*:*:*
juniper junos 17.2 cpe:2.3:o:juniper:junos:17.2:r2:*:*:*:*:*:*
juniper junos 17.2 cpe:2.3:o:juniper:junos:17.2:r2-s6:*:*:*:*:*:*
juniper junos 17.2 cpe:2.3:o:juniper:junos:17.2:r2-s7:*:*:*:*:*:*
juniper junos 17.2 cpe:2.3:o:juniper:junos:17.2:r3:*:*:*:*:*:*
juniper junos 17.2 cpe:2.3:o:juniper:junos:17.2:r3-s1:*:*:*:*:*:*
juniper junos 17.2 cpe:2.3:o:juniper:junos:17.2:r3-s2:*:*:*:*:*:*
juniper junos 17.2x75 cpe:2.3:o:juniper:junos:17.2x75:-:*:*:*:*:*:*
juniper junos 17.2x75 cpe:2.3:o:juniper:junos:17.2x75:d102:*:*:*:*:*:*
juniper junos 17.2x75 cpe:2.3:o:juniper:junos:17.2x75:d50:*:*:*:*:*:*
juniper junos 17.2x75 cpe:2.3:o:juniper:junos:17.2x75:d70:*:*:*:*:*:*
juniper junos 17.2x75 cpe:2.3:o:juniper:junos:17.2x75:d92:*:*:*:*:*:*
juniper junos 17.3 cpe:2.3:o:juniper:junos:17.3:-:*:*:*:*:*:*
juniper junos 17.3 cpe:2.3:o:juniper:junos:17.3:r1-s1:*:*:*:*:*:*
juniper junos 17.3 cpe:2.3:o:juniper:junos:17.3:r2:*:*:*:*:*:*
juniper junos 17.3 cpe:2.3:o:juniper:junos:17.3:r2-s1:*:*:*:*:*:*
juniper junos 17.3 cpe:2.3:o:juniper:junos:17.3:r2-s2:*:*:*:*:*:*
juniper junos 17.3 cpe:2.3:o:juniper:junos:17.3:r2-s3:*:*:*:*:*:*
juniper junos 17.3 cpe:2.3:o:juniper:junos:17.3:r2-s4:*:*:*:*:*:*
juniper junos 17.3 cpe:2.3:o:juniper:junos:17.3:r3:-:*:*:*:*:*
juniper junos 17.3 cpe:2.3:o:juniper:junos:17.3:r3-s1:*:*:*:*:*:*
juniper junos 17.3 cpe:2.3:o:juniper:junos:17.3:r3-s2:*:*:*:*:*:*
juniper junos 17.3 cpe:2.3:o:juniper:junos:17.3:r3-s3:*:*:*:*:*:*
juniper junos 17.3 cpe:2.3:o:juniper:junos:17.3:r3-s4:*:*:*:*:*:*
juniper junos 17.3 cpe:2.3:o:juniper:junos:17.3:r3-s5:*:*:*:*:*:*
juniper junos 17.4 cpe:2.3:o:juniper:junos:17.4:-:*:*:*:*:*:*

References for CVE-2020-1629

URL Tags
https://kb.juniper.net/JSA11009 Vendor Advisory
cvelogic Threat Intelligence