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Advisories

libsmb2 before 6.3 Integer Overflow in DCE/RPC NDR Decoder via NetrShareEnum

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Severity
high
Date
Affecting

  • libsmb2 >= 0, < 6.3

CWE
  • CWE-190 Integer Overflow or Wraparound
CVSS
7.2
CVSS V4 Vector
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:L/VI:L/VA:H/SC:N/SI:N/SA:N
Credit
HaiND from the Post and Telecommunication Institute of Technology
Description
libsmb2 before 6.3 contains integer overflow vulnerabilities in the DCE/RPC NDR decoder in lib/dcerpc.c that allow heap out-of-bounds reads and writes. A malicious SMB server or machine-in-the-middle on unsigned connections can send crafted NetrShareEnum replies with wrapping actual_count or max_count values when clients call smb2_share_enum_async(), corrupting heap memory.

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