CVE-2020-1600Junos OS: A specific SNMP command can trigger a high CPU usage Denial of Service in the RPD daemon.
- 6.5MediumCVSS base score
- 1.2%Exploitation in 30 daysEPSS · top 31% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
Description
In a Point-to-Multipoint (P2MP) Label Switched Path (LSP) scenario, an uncontrolled resource consumption vulnerability in the Routing Protocol Daemon (RPD) in Juniper Networks Junos OS allows a specific SNMP request to trigger an infinite loop causing a high CPU usage Denial of Service (DoS) condition. This issue affects both SNMP over IPv4 and IPv6. This issue affects: Juniper Networks Junos OS: 12.3X48 versions prior to 12.3X48-D90; 15.1 versions prior to 15.1R7-S6; 15.1X49 versions prior to 15.1X49-D200; 15.1X53 versions prior to 15.1X53-D238, 15.1X53-D592; 16.1 versions prior to 16.1R7-S5; 16.2 versions prior to 16.2R2-S11; 17.1 versions prior to 17.1R3-S1; 17.2 versions prior to 17.2R3-S2; 17.3 versions prior to 17.3R3-S7; 17.4 versions prior to 17.4R2-S4, 17.4R3; 18.1 versions prior to 18.1R3-S5; 18.2 versions prior to 18.2R3; 18.2X75 versions prior to 18.2X75-D50; 18.3 versions prior to 18.3R2; 18.4 versions prior to 18.4R2; 19.1 versions prior to 19.1R2.
Timeline
ID reserved
By juniper
- 2 months later
· 2 months later
Published
- 5 years later
· 5 years later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| juniperCNA (assigner) | 3.1 | Medium6.5 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H |
| NVDNVD · Modified | 3.1 | Medium6.5 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H |
- EPSS (exploitation in 30 days)
- 1.2% · top 31% of all CVEs (12 Nov 2026)
The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 6.5.
Affected products
- affected 12.3X48 – < 12.3X48-D90
- affected 15.1X53 – < 15.1X53-D238, 15.1X53-D592
- affected 16.1 – < 16.1R7-S5
- affected 16.2 – < 16.2R2-S11
- affected 17.1 – < 17.1R2-S11, 17.1R3-S1
- affected 17.2 – < 17.2R3-S2
- affected 17.3 – < 17.3R3-S7
- affected 17.4 – < 17.4R2-S4, 17.4R3
- affected 18.1 – < 18.1R3-S5
- affected 18.2 – < 18.2R3
- affected 18.2X75 – < 18.2X75-D50
- affected 18.3 – < 18.3R2
- affected 18.4 – < 18.4R2
- affected 19.1 – < 19.1R2
- affected 19.2 – < 19.2R1
- affected 15.1X49 – < 15.1X49-D200
- affected 15.1 – < 15.1R7-S6
What to do
Solution: The following software releases have been updated to resolve this specific issue: 12.3X48-D90, 15.1X49-D200, 15.1R7-S6, 15.1X53-D238, 15.1X53-D592, 16.1R7-S5, 16.2R2-S11, 17.1R3-S1, 17.2R3-S2, 17.3R3-S7, 17.4R2-S4, 17.4R3, 18.1R3-S5, 18.2R3, 18.2X75-D50, 18.3R2, 18.4R2, 19.1R2, 19.2R1, and all subsequent releases.
Workaround: If SNMP is not needed, remove SNMP from the system, otherwise, there are no available workarounds for this issue. SNMP is disabled by default. Additional steps which may reduce the risk of exploitation include: Utilizing edge filtering with source-address validation (uRPF, etc.), access control lists (ACLs), and/or SNMPv3 authentication to limit access to the device only from trusted hosts.
Exploitation: Juniper SIRT is not aware of any malicious exploitation of this vulnerability.
References
References2
- https://prsearch.juniper.net/InfoCenter/index?page=prcontent&id=PR1402185 (opens in a new tab)x_refsource_MISCx_transferred
- https://kb.juniper.net/JSA10979 (opens in a new tab)x_refsource_CONFIRMx_transferred
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2020-12470 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2020-1600)Record last updated .