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Advisories

Nanobot < 0.2.1 Denial of Service via Matrix Media Download Handler

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severity
medium
date
Affecting

  • Nanobot < 0.2.1

CWE
  • CWE-770 Allocation of Resources Without Limits or Throttling
CVSS
5.3
CVSS V4 Vector
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N
Credit
Chia Min Jun Lennon
Description
Nanobot prior to version 0.2.1 contains a denial of service vulnerability in the Matrix channel media download handler that allows authenticated room members to exhaust process memory and bandwidth by sending media events with missing or invalid size metadata. Attackers can send multiple concurrent Matrix media events with omitted or invalid declared sizes to trigger simultaneous large media downloads that fully materialize response bodies before post-download rejection, consuming process resources until service degradation occurs.

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