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Advisories

DrayTek VigorSwitch Multiple Models Buffer Overflow via mail_mailalert

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severity
high
date
Affecting

  • VigorSwitch G2540xs >= 0, < 3.9.10

  • VigorSwitch P2540xs >= 0, < 3.9.10

  • VigorSwitch FX2120 >= 0, < 3.9.10

  • VigorSwitch G2282x >= 0, < 2.10.6

  • VigorSwitch P2282x >= 0, < 2.10.6

  • VigorSwitch Q2300x >= 0, < 2.10.7

  • VigorSwitch PQ2300xb >= 0, < 2.10.7

  • VigorSwitch G2542x >= 0, < 3.10.6

  • VigorSwitch P2542x >= 0, < 3.10.6

  • VigorSwitch P2542xh >= 0, < 3.10.6

  • VigorSwitch PX2060 >= 0, < 2.9.10

  • VigorSwitch G1280 >= 0, < 2.9.10

  • VigorSwitch P1280 >= 0, < 2.9.10

  • VigorSwitch P1281x >= 0, < 2.9.10

  • VigorSwitch G1282 >= 0, < 2.9.10

  • VigorSwitch P1282 >= 0, < 2.9.10

  • VigorSwitch G2121 >= 0, < 2.9.10

  • VigorSwitch P2121 >= 0, < 2.9.10

  • VigorSwitch PQ2121x >= 0, < 2.9.10

  • VigorSwitch Q2121x >= 0, < 2.9.10

  • VigorSwitch G2280x >= 0, < 2.9.10

  • VigorSwitch P2280x >= 0, < 2.9.10

  • VigorSwitch Q2200x >= 0, < 2.9.10

  • VigorSwitch PQ2200xb >= 0, < 2.9.10

  • VigorSwitch G2100 >= 0, < 2.9.10

  • VigorSwitch P2100 >= 0, < 2.9.10

  • VigorSwitch G2540x >= 0, < 2.9.10

  • VigorSwitch P2540x >= 0, < 2.9.10

CWE
  • CWE-120 Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')
CVSS
8.6
CVSS V4 Vector
CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
Credit
Jincheng Wang (@winmt), Le Yu (Nanjing University of Posts and Telecommunications), Xiapu Luo (The Hong Kong Polytechnic University)
Description
Multiple DrayTek VigorSwitch models contain a buffer overflow vulnerability in the mail_mailalert function. The vulnerability is caused by concatenating multiple smtpReceiver email addresses into a fixed-size buffer without checking the remaining buffer size. A remote attacker can trigger this vulnerability via crafted input, causing a denial of service or potentially executing arbitrary commands. Exploitation requires valid administrative credentials for the device's web management interface.

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