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.
Affected products
Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.
sahlberg libsmb2
Default version status: unaffected
0 to < 6.3affected
References
- https://hackmd.io/@haindpwn/libsmb2-dcerpc-ndr-count-overflow-oob ↗
- https://github.com/sahlberg/libsmb2/issues/496 ↗
- https://github.com/sahlberg/libsmb2/commit/a79f6914cb5ed3f74293d15cdea901261ce179ff ↗
- https://github.com/sahlberg/libsmb2/releases/tag/libsmb2-6.3 ↗
- https://github.com/sahlberg/libsmb2 ↗
- https://www.vulncheck.com/advisories/libsmb2-before-6.3-integer-overflow-in-dce-rpc-ndr-decoder-via-netrshareenum ↗