CVE-2026-48687

Kaynağa göre önem derecesi

Trivy'nin kendi etiketi CRITICAL. Kritik diyenler: NVD. Daha düşük diyenler: Ubuntu (orta).

Açıklama

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.

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Referanslar

• https://github.com/pavel-odintsov/fastnetmon
• https://github.com/pavel-odintsov/fastnetmon/blob/master/src/juniper_plugin/fastnetmon_juniper.php
• https://github.com/pavel-odintsov/fastnetmon/commit/6f58184fb60248df011c4c379bf445e07609ad27
• https://github.com/pavel-odintsov/fastnetmon/pull/1049
• https://lorikeetsecurity.com/blog/fastnetmon-cve-2026-48687-juniper-cmd-injection
• https://ubuntu.com/security/notices/USN-8429-1
• https://www.cve.org/CVERecord?id=CVE-2026-48687