Description
In the Linux kernel, the following vulnerability has been resolved: smb: client: reject short READ responses in CIFSSMBRead() CIFSSMBRead() reads DataLengthHigh, DataLength and DataOffset out of the READ_RSP returned by the server without first checking that a whole READ_RSP was actually received. The length of the response is recorded in rsp_iov.iov_len, but nothing constrains it to be at least read_rsp_size before those fields are dereferenced. A malicious or compromised SMB1 server can return a response shorter than the READ_RSP header, so that parsing the header itself reads past the end of the receive buffer. SMB1 is not negotiated by default; reaching this code requires an explicit vers=1.0 mount. Reject the response unless it is at least read_rsp_size bytes long.
Affected products
Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.
Linux Linux
Default version status: unaffected
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to < 0f1f77b821506a4dacab6ce7d29cf9e0c26f14cdaffected1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to < aaa221c1b1d288845b55e9c366e5ef608dfff49daffected1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to < e6142a8bfc230c7263eb8b0475249c958ce49367affected
Linux Linux
Default version status: affected
2.6.12affected0 to < 2.6.12unaffected6.18.53 to ≤ 6.18.*unaffected7.2.7 to ≤ 7.2.*unaffected7.3 to ≤ *unaffected