Junos OS: SRX and EX Series: Local privilege escalation flaw in "download" functionality

Description

An Improper Neutralization of Special Elements vulnerability in the download manager of Juniper Networks Junos OS on SRX Series and EX Series allows a locally authenticated attacker with low privileges to take full control over the device. One aspect of this vulnerability is that the attacker needs to be able to execute any of the "request ..." or "show system download ..." commands. This issue affects Juniper Networks Junos OS on SRX Series and EX Series: All versions prior to 19.2R1-S9, 19.2R3-S5; 19.3 versions prior to 19.3R3-S6; 19.4 versions prior to 19.4R3-S8; 20.1 versions prior to 20.1R3-S4; 20.2 versions prior to 20.2R3-S4; 20.3 versions prior to 20.3R3-S3; 20.4 versions prior to 20.4R3-S2, 20.4R3-S3; 21.1 versions prior to 21.1R3-S1; 21.2 versions prior to 21.2R2-S2, 21.2R3; 21.3 versions prior to 21.3R2, 21.3R3; 21.4 versions prior to 21.4R1-S1, 21.4R2.

Scores

EPSS (exploitation in 30 days)

0.22% · top 88% of all CVEs (6 Nov 2026)

The list uses the assigner's score when there is one, then CISA's, then NVD's: High 7.8.

Weakness

• 78

Affected products

• Juniper Networks · Junos OS

  • affected unspecified – < 19.1R3-S9
  • affected 19.2 – < 19.2R1-S9, 19.2R3-S5
  • affected 19.3 – < 19.3R3-S6
  • affected 19.4 – < 19.4R3-S8
  • affected 20.1 – < 20.1R3-S4
  • affected 20.2 – < 20.2R3-S4
  • affected 20.3 – < 20.3R3-S3
  • affected 20.4 – < 20.4R3-S2, 20.4R3-S3
  • affected 21.1 – < 21.1R3-S1
  • affected 21.2 – < 21.2R2-S2, 21.2R3
  • affected 21.3 – < 21.3R2, 21.3R3
  • affected 21.4 – < 21.4R1-S1, 21.4R2

What to do

Solution: The following software releases have been updated to resolve this specific issue: 19.1R3-S9, 19.2R1-S9, 19.2R3-S5, 19.4R3-S8, 20.2R3-S4, 20.3R3-S3, 20.4R3-S2, 20.4R3-S3, 21.1R3-S1, 21.2R2-S2, 21.2R3, 21.3R2, 21.3R3, 21.4R1-S1, 21.4R2, 22.1R1, and all subsequent releases.

Workaround: A workaround would be to deny users access to the "request system download ..." and "show system download ..." CLI commands.

Exploitation: Juniper SIRT is not aware of any malicious exploitation of this vulnerability.

References (1)

• https://kb.juniper.net/JSA69725 (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

[![CVE-2022-22221](https://trackcve.app/badge/CVE-2022-22221.svg)](https://trackcve.app/cve/CVE-2022-22221)

Record last updated 17 Sept 2024, 00:15 UTC.