CVE-2022-22156
Junos OS: Certificate validation is skipped when fetching system scripts from a HTTPS URL
- Published
- Updated
- Reserved
- Assigned by
- juniper
Description
An Improper Certificate Validation weakness in the Juniper Networks Junos OS allows an attacker to perform Person-in-the-Middle (PitM) attacks when a system script is fetched from a remote source at a specified HTTPS URL, which may compromise the integrity and confidentiality of the device. The following command can be executed by an administrator via the CLI to refresh a script from a remote location, which is affected from this vulnerability: >request system scripts refresh-from (commit | event | extension-service | op | snmp) file filename url <https-url> This issue affects: Juniper Networks Junos OS All versions prior to 18.4R2-S9, 18.4R3-S9; 19.1 versions prior to 19.1R2-S3, 19.1R3-S7; 19.2 versions prior to 19.2R1-S7, 19.2R3-S3; 19.3 versions prior to 19.3R3-S4; 19.4 versions prior to 19.4R3-S7; 20.1 versions prior to 20.1R2-S2, 20.1R3; 20.2 versions prior to 20.2R3; 20.3 versions prior to 20.3R2-S1, 20.3R3; 20.4 versions prior to 20.4R2; 21.1 versions prior to 21.1R1-S1, 21.1R2.
Timeline
ID reserved
By juniper
- 29 days later
· 29 days later
Published
- 3 years later
· 3 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:H/PR:N/UI:N/S:U/C:L/I:H/A:N |
| NVDNVD · Modified | 3.1 | High7.4 | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N |
- EPSS (exploitation in 30 days)
- 0.55% · top 54% of all CVEs (7 Nov 2026)
The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 6.5.
Weakness
- CWE-358 Improperly Implemented Security Check for Standard (opens in a new tab)All about CWE-358 and its CVEs
- CWE-295 Improper Certificate Validation (opens in a new tab)All about CWE-295 and its CVEs
- CWE-300 Channel Accessible by Non-Endpoint ('Man-in-the-Middle') (opens in a new tab)All about CWE-300 and its CVEs
Affected products
- affected unspecified – < 18.4R2-S9, 18.4R3-S9
- affected 19.1 – < 19.1R2-S3, 19.1R3-S7
- affected 19.2 – < 19.2R1-S7, 19.2R3-S3
- affected 19.3 – < 19.3R3-S4
- affected 19.4 – < 19.4R3-S7
- affected 20.1 – < 20.1R2-S2, 20.1R3
- affected 20.2 – < 20.2R3
- affected 20.3 – < 20.3R2-S1, 20.3R3
- affected 20.4 – < 20.4R2
- affected 21.1 – < 21.1R1-S1, 21.1R2
What to do
Solution: The following software releases have been updated to resolve this specific issue: 18.4R2-S9, 18.4R3-S9, 19.1R2-S3, 19.1R3-S7, 19.2R1-S7, 19.2R3-S3, 19.3R3-S4, 19.4R3-S7, 20.1R2-S2, 20.1R3, 20.2R3, 20.3R2-S1, 20.3R3, 20.4R2, 21.1R1-S1, 21.1R2, 21.2R1 and all subsequent releases.
Workaround: There are no viable workarounds for this issue.
Exploitation: Juniper SIRT is not aware of any malicious exploitation of this vulnerability.
References (1)
- https://kb.juniper.net/JSA11264 (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)
- 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://trackcve.app/cve/CVE-2022-22156)Record last updated .