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Advisories

Netcore NR256CN through 1.5.140116 Boa Web Server NULL Pointer Dereference DoS

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Severity
high
Date
Affecting

  • NR256CN <= 1.5.140116

CWE
  • CWE-476 NULL Pointer Dereference
CVSS
8.7
CVSS V4 Vector
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
Credit
Zhou Ao, Yin Luxing, Lu Fangzhou, Liu Xin
Description
Netcore NR256CN through 1.5.140116 contains a NULL pointer dereference vulnerability in the Boa web server's user_auth() function that allows unauthenticated attackers to crash the server via a malformed Authorization header. Attackers can send a Basic Authorization value lacking a colon, such as one decoding to a single character, to protected routes like /router/get_user_type.cgi to kill the main Boa process and deny management interface access.

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