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Application crash on OctetString response. #2

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mvystrcil opened this issue Jan 18, 2022 · 2 comments
Open

Application crash on OctetString response. #2

mvystrcil opened this issue Jan 18, 2022 · 2 comments

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@mvystrcil
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On reception of OctetString in response application crashes.

Easily reproducible - walk table ifTable from mib-2. Once response for ifPhysAddress is received, error *** buffer overflow detected ***: terminated is raised.

Not sure if helpful, but if content of octet string in response is printable - "lo" for example, response is processed. In case response is MAC address (hex numbers), crash happens.
@mvystrcil
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After some debugging I found the error is in smi library.
Call in agent.cpp:614 fails.

Variables

  • myvalue - SMI_BASETYPE_OCTETSTRING "abcabc"
  • type - SMI_BASETYPE_OCTETSTRING / SMI_DECL_TEXTUALCONVENTION / format: 1x: / name "PhysAddress"

@mvystrcil
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Ok, asking smi library to format string as 1x: is root cause of this problem, libsmi v0.5.0 used.

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@mvystrcil