smb: client: reject short READ responses in CIFSSMBRead()
- Published
- Last modified
- Where the record stands: published, rejected by its publisher, or superseded by another id.What do these mean? →
- published
- Whether CISA lists it in its Known Exploited Vulnerabilities catalog: proof that attackers are using it.What do these mean? →
- Not listed in CISA KEV
- Fix
- Fixed in 6.18.53, 7.2.7
- Whether working attack code is public (Exploit-DB, Metasploit, Nuclei or GitHub). Public code makes attacks easier.What do these mean? →
- None on Exploit-DB, Metasploit or GitHub
Summary
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.
Timeline
- CVE published
- Record last updated
Affected versions
- Linux Linux
From 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 · fixed in 0f1f77b821506a4dacab6ce7d29cf9e0c26f14cd; From 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 · fixed in aaa221c1b1d288845b55e9c366e5ef608dfff49d; From 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 · fixed in e6142a8bfc230c7263eb8b0475249c958ce49367
- Linux Linux
2.6.12
- KernelLinux
From 2.6.12 · fixed in 6.18.53; From 6.19.0 · fixed in 7.2.7