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Advisories

MikroTik RouterOS < 7.24 Heap Corruption via SMB1 SessionSetupAndX

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severity
high
date
Affecting

  • RouterOS <= 6.49.18

  • RouterOS >= 7.0.0, <= 7.11.2

CWE
  • CWE-122 Heap-based Buffer Overflow
  • CWE-191 Integer Underflow (Wrap or Wraparound)
CVSS
8.2
CVSS V4 Vector
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
References
Credit
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Description
MikroTik RouterOS before 7.24 contains a heap memory corruption vulnerability in the userspace SMB daemon that allows remote attackers to corrupt adjacent heap memory by supplying a crafted uniPwdLen value in the SMB1 SessionSetupAndX handler. An attacker can send a malformed SMB1 request with a uniPwdLen field that triggers an integer underflow, causing the resulting value to be used as the copy length in a memory copy operation into a smaller heap buffer, corrupting adjacent heap memory.

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