DEBIAN-CVE-2026-48687
- Source
- https://security-tracker.debian.org/tracker/CVE-2026-48687
- Import Source
- https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-48687.json
- JSON Data
- https://api.osv.dev/v1/vulns/DEBIAN-CVE-2026-48687
- Upstream
- Published
- 2026-05-26T16:16:26Z
- Modified
- 2026-09-14T17:03:16Z
- Severity
-
- 9.8 (Critical) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H CVSS Calculator
- Summary
- [none]
- Details
-
FastNetMon Community Edition through 1.2.9 contains an OS command injection vulnerability in the Juniper router integration plugin. The _log() function in src/juniper_plugin/fastnetmon_juniper.php (lines 117-118) constructs shell commands by concatenating the $msg parameter directly into exec() calls: exec("echo
date"- {FASTNETMON] - " . $msg . " " >> " . $FILE_LOG_TMP). The $msg variable contains unsanitized data derived from command-line arguments argv[1] through argv[3], which represent the attack IP address, direction, and power. While FastNetMon's C++ core currently passes IP addresses via inet_ntoa() (which only produces safe dotted-decimal notation), the PHP script performs no input validation or shell escaping. If the script is invoked directly, by another orchestration system, or if future code changes pass string-sourced IPs, arbitrary commands can be injected. The correct fix is to replace exec() with file_put_contents() or use escapeshellarg() on all parameters. - References
Affected packages
Debian:12 / fastnetmon
Package
- Name
- fastnetmon
- Purl
- pkg:deb/debian/fastnetmon?arch=source&distro=bookworm
Affected ranges
- Type
- ECOSYSTEM
- Events
-
Introduced0 Unknown introduced version / All previous versions are affected
Debian:13 / fastnetmon
Package
- Name
- fastnetmon
- Purl
- pkg:deb/debian/fastnetmon?arch=source&distro=trixie
Debian:14 / fastnetmon
Package
- Name
- fastnetmon
- Purl
- pkg:deb/debian/fastnetmon?arch=source&distro=forky