CVE-2020-1648 | Junos OS and Junos OS Evolved: RPD crash when processing a specific BGP packet

On Juniper Networks Junos OS and Junos OS Evolved devices, processing a specific BGP packet can lead to a routing process daemon (RPD) crash and restart. This issue can occur even before the BGP session with the peer is established. Repeated receipt of this specific BGP packet can result in an extended Denial of Service (DoS) condition. This issue affects: Juniper Networks Junos OS: 18.2X75 versions starting from 18.2X75-D50.8, 18.2X75-D60 and later versions, prior to 18.2X75-D52.8, 18.2X75-D53, 18.2X75-D60.2, 18.2X75-D65.1, 18.2X75-D70; 19.4 versions 19.4R1 and 19.4R1-S1; 20.1 versions prior to 20.1R1-S2, 20.1R2. Juniper Networks Junos OS Evolved: 19.4-EVO versions prior to 19.4R2-S2-EVO; 20.1-EVO versions prior to 20.1R2-EVO. This issue does not affect: Juniper Networks Junos OS releases prior to 19.4R1. Juniper Networks Junos OS Evolved releases prior to 19.4R1-EVO.

Published: 2020-07-17 Last update: 2024-11-21 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2020-1648 is rated Moderate Risk (49.9/100): CVSS High severity, with medium exploitation likelihood (EPSS 0.39%). 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-2020-1648

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 2025-03-30 0.46% 0.39% -0.08%
2 2025-03-29 0.39% 0.46% +0.08%
3 2025-03-17 — 0.39% —

Full EPSS history (8 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2020-1648

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
7.5 3.1 HIGH
CVSS:3.1/AV:N/AC:L/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:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
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.
 3.9 3.6 [email protected]
7.5 3.1 HIGH
CVSS:3.1/AV:N/AC:L/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:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
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.
 3.9 3.6 [email protected]
5.0 2.0 MEDIUM
AV:N/AC:L/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:L)
Exploitation conditions are straightforward and predictable.
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.
 10.0 2.9 [email protected]

Weakness enumeration for CVE-2020-1648

Affected software / configurations for CVE-2020-1648

Vendor Product Version Raw CPE
juniper junos 18.2x75 cpe:2.3:o:juniper:junos:18.2x75:*:*:*:*:*:*:*
juniper junos 18.2x75 cpe:2.3:o:juniper:junos:18.2x75:-:*:*:*:*:*:*
juniper junos 18.2x75 cpe:2.3:o:juniper:junos:18.2x75:d20:*:*:*:*:*:*
juniper junos 18.2x75 cpe:2.3:o:juniper:junos:18.2x75:d30:*:*:*:*:*:*
juniper junos 18.2x75 cpe:2.3:o:juniper:junos:18.2x75:d40:*:*:*:*:*:*
juniper junos 19.4 cpe:2.3:o:juniper:junos:19.4:r1:*:*:*:*:*:*
juniper junos 19.4 cpe:2.3:o:juniper:junos:19.4:r1-s1:*:*:*:*:*:*
juniper junos 20.1 cpe:2.3:o:juniper:junos:20.1:r1:*:*:*:*:*:*
juniper junos 20.1 cpe:2.3:o:juniper:junos:20.1:r1-s1:*:*:*:*:*:*
juniper junos_os_evolved 19.4 cpe:2.3:o:juniper:junos_os_evolved:19.4:r1:*:*:*:*:*:*
juniper junos_os_evolved 19.4 cpe:2.3:o:juniper:junos_os_evolved:19.4:r2:*:*:*:*:*:*
juniper junos_os_evolved 19.4 cpe:2.3:o:juniper:junos_os_evolved:19.4:r2-s1:*:*:*:*:*:*
juniper junos_os_evolved 20.1 cpe:2.3:o:juniper:junos_os_evolved:20.1:r1:*:*:*:*:*:*

References for CVE-2020-1648

URL Tags
https://kb.juniper.net/JSA11035 Vendor Advisory
cvelogic Threat Intelligence