| 제목 | WAVLINK NU516U1 2026-05-15 (build 708c073-mt7628) Command Injection |
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| 설명 |
WAVLINK NU516U1 has an OS command injection vulnerability in the `adm.cgi` binary. The `page=lan` handler stores the `lan_ip` POST parameter to UCI config without sanitizing shell metacharacters. The `page=openDHCP` handler subsequently reads this value back and interpolates it into an `ifconfig` command passed to `system()`. An authenticated attacker can inject arbitrary commands by sending two HTTP requests: the first poisons the stored LAN IP address with shell metacharacters, the second triggers the `system()` call that evaluates them. Commands execute as `uid=0(root)`.
The POST parameter parser (`FUN_0040ab18`) only filters control characters (`≤0x1f` and `0x7f`) — shell metacharacters (`;`, `>`, `$`, `|`) all pass through unmodified. |
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| 원천 | ⚠️ https://github.com/oduoke567/WAVLINK-NU516U1-2026-05-1/blob/main/report4.md |
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| 사용자 | oduoke (UID 98772) |
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| 제출 | 2026. 06. 06. PM 12:35 (4 개월 ago) |
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| 모더레이션 | 2026. 08. 02. PM 10:34 (2 months later) |
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| 상태 | 중복 |
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| VulDB 항목 | 377842 [Wavlink WL-NU516U1 260515 /cgi-bin/adm.cgi wlink_uci_set_value lan_ip 권한 상승] |
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| 포인트들 | 0 |
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