Description (CNA)
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 (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before 0f1f77b821506a4dacab6ce7d29cf9e0c26f14cd; affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before aaa221c1b1d288845b55e9c366e5ef608dfff49d; affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before e6142a8bfc230c7263eb8b0475249c958ce49367 |
| Linux / Linux | affected 2.6.12; unaffected 0 before 2.6.12; unaffected 6.18.53 through 6.18.*; unaffected 7.2.7 through 7.2.*; unaffected 7.3 through * |
CWE
No CWE identifiers supplied.