Advisories

lwIP 2.0.0 through 2.2.1 SNMP Agent Out-of-Bounds Read via snmp_pbuf_stream_writeto()

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Severity
medium
Date
Affecting
  • lwIP >= 2.0.0, <= 2.2.1

CWE
  • CWE-125 Out-of-bounds Read
CVSS
6.9
CVSS V4 Vector
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N
Credit
Julio Fort (Blaze Information Security), Julio Fort (Blaze Information Security)
Description
lwIP 2.0.0 through 2.2.1 built with the SNMP agent contains an out-of-bounds read vulnerability in snmp_pbuf_stream_writeto() that bounds copies by pbuf->len instead of remaining bytes. Remote unauthenticated attackers knowing the read community can send fragmented SNMP requests to receive adjacent receive-buffer or pool memory echoed in responses.

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