UBUNTU-CVE-2023-38431
An issue was discovered in the Linux kernel before 6.3.8. fs/smb/server/connection.c in ksmbd does not validate the relationship between the NetBIOS header's length field and the SMB header sizes, via pdu_size in ksmbd_conn_handler_loop, leading to an out-of-bounds read.
02 / AFFECTED SOFTWARE
Affected packages
27 explicit affected versions
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5 explicit affected versions
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23 explicit affected versions
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7 explicit affected versions
34 explicit affected versions
26 explicit affected versions
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10 explicit affected versions
26 explicit affected versions
1 explicit affected versions
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45 explicit affected versions
35 explicit affected versions
3 explicit affected versions
2 explicit affected versions
12 explicit affected versions
32 explicit affected versions
10 explicit affected versions
18 explicit affected versions
8 explicit affected versions
6 explicit affected versions
5 explicit affected versions
8 explicit affected versions
5 explicit affected versions
13 explicit affected versions
7 explicit affected versions
37 explicit affected versions
10 explicit affected versions
11 explicit affected versions
12 explicit affected versions
44 explicit affected versions
16 explicit affected versions
13 explicit affected versions
31 explicit affected versions
37 explicit affected versions
38 explicit affected versions
35 explicit affected versions
9 explicit affected versions
34 explicit affected versions
11 explicit affected versions
42 explicit affected versions
3 explicit affected versions
16 explicit affected versions
4 explicit affected versions
1 explicit affected versions
1 explicit affected versions
40 explicit affected versions
43 explicit affected versions
10 explicit affected versions
8 explicit affected versions
8 explicit affected versions
4 explicit affected versions
1 explicit affected versions
03 / CONNECTIONS
Connected vulnerabilities
04 / EVIDENCE
Source records
An issue was discovered in the Linux kernel before 6.3.8. fs/smb/server/connection.c in ksmbd does not validate the relationship between the NetBIOS header's length field and the SMB header sizes, via pdu_size in ksmbd_conn_handler_loop, leading to an out-of-bounds read.
05 / REFERENCES
Further evidence
- https://cdn.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.3.8
- https://git.kernel.org/linus/368ba06881c395f1c9a7ba22203cf8d78b4addc0
- https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/fs/smb/server?id=368ba06881c395f1c9a7ba22203cf8d78b4addc0
- https://ubuntu.com/security/CVE-2023-38431
- https://ubuntu.com/security/notices/USN-6412-1
- https://ubuntu.com/security/notices/USN-6466-1
- https://ubuntu.com/security/notices/USN-6725-1
- https://ubuntu.com/security/notices/USN-6725-2
- https://www.cve.org/CVERecord?id=CVE-2023-38431