CVE-2020-1688Junos OS: SRX and NFX Series: Insufficient Web API private key protection
- 6.5MediumCVSS base score
- 0.32%Exploitation in 30 daysEPSS · top 75% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
Description
On Juniper Networks SRX Series and NFX Series, a local authenticated user with access to the shell may obtain the Web API service private key that is used to provide encrypted communication between the Juniper device and the authenticator services. Exploitation of this vulnerability may allow an attacker to decrypt the communications between the Juniper device and the authenticator service. This Web API service is used for authentication services such as the Juniper Identity Management Service, used to obtain user identity for Integrated User Firewall feature, or the integrated ClearPass authentication and enforcement feature. This issue affects Juniper Networks Junos OS on Networks SRX Series and NFX Series: 12.3X48 versions prior to 12.3X48-D105; 15.1X49 versions prior to 15.1X49-D190; 16.1 versions prior to 16.1R7-S8; 17.2 versions prior to 17.2R3-S4; 17.3 versions prior to 17.3R3-S8; 17.4 versions prior to 17.4R2-S11, 17.4R3; 18.1 versions prior to 18.1R3-S7; 18.2 versions prior to 18.2R3; 18.3 versions prior to 18.3R2-S4, 18.3R3; 18.4 versions prior to 18.4R1-S7, 18.4R2; 19.1 versions prior to 19.1R2; 19.2 versions prior to 19.2R1-S4, 19.2R2.
Timeline
ID reserved
By juniper
- 12 months later
· 12 months later
Published
- 4 years later
· 4 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:L/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N |
| NVDNVD · Modified | 3.1 | Medium6.5 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N |
- EPSS (exploitation in 30 days)
- 0.32% · top 75% of all CVEs (13 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-D105
- affected 15.1X49 – < 15.1X49-D190
- affected 16.1 – < 16.1R7-S8
- affected 17.2 – < 17.2R3-S4
- affected 17.3 – < 17.3R3-S8
- affected 17.4 – < 17.4R2-S11, 17.4R3
- affected 18.1 – < 18.1R3-S7
- affected 18.2 – < 18.2R3
- affected 18.3 – < 18.3R2-S4, 18.3R3
- affected 18.4 – < 18.4R1-S7, 18.4R2,
- affected 19.1 – < 19.1R2
- affected 19.2 – < 19.2R1-S4, 19.2R2
What to do
Solution: The following software releases have been updated to resolve this specific issue: Junos OS 12.3X48-D105, 15.1X49-D190, 16.1R7-S8, 17.2R3-S4, 17.3R3-S8, 17.4R2-S11, 17.4R3, 18.1R3-S7, 18.2R3, 18.3R2-S4, 18.3R3, 18.4R1-S7, 18.4R2, 18.4R3, 19.1R2, 19.2R1-S4, 19.2R2, 19.3R1, and all subsequent releases.
Workaround: Disallow unprivileged authenticated users access to Junos shell. Limit shell access to only trusted administrators.
Exploitation: Juniper SIRT is not aware of any malicious exploitation of this vulnerability.
References
References5
- https://kb.juniper.net/JSA11085 (opens in a new tab)x_refsource_CONFIRMx_transferred
- https://kb.juniper.net/InfoCenter/index?page=content&id=KB30911 (opens in a new tab)x_refsource_MISCx_transferred
- https://www.juniper.net/documentation/en_US/junos/topics/topic-map/security-user-auth-configure-jims.html (opens in a new tab)x_refsource_MISCx_transferred
- https://www.juniper.net/documentation/en_US/junos/topics/topic-map/security-user-auth-intergrated-user-firewall-overview.html (opens in a new tab)x_refsource_MISCx_transferred
- https://www.juniper.net/documentation/en_US/junos/topics/reference/configuration-statement/services-webapi-user-cli.html (opens in a new tab)x_refsource_MISCx_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-2020-12550 (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-2020-1688)Record last updated .