Astra Linux – Vulnerability found in Linux 5.15, Linux 6.1

In the Linux kernel, the following vulnerabilities have been resolved: ksmbd: fixed a UAF Unauthorized File Access issue in smb20oplockbreakack. Also, the reference was removed after using opinfo...

Astra Linux – Vulnerability in Linux 5.15

In the Linux kernel, the following vulnerability has been resolved: cifs: fixed a small mempool leak in SMB2negotiate. In some cases of failures dialect mismatches in SMB2negotiate, after the request is sent, the checks would return -EIO. Instead, it should return rc = -EIO and proceed to negexit...

Astra Linux – Vulnerability in Linux 5.15

A issue was discovered in ksmbd within the Linux kernel versions 5.15 through 5.19, prior to 5.19.2. There is a heap-based buffer overflow in the setntacldacl function, which is related to the use of the SMB2QUERYINFOHE function after an incorrectly formatted SMB2SETINFOHE command...

Astra Linux – Vulnerability in Linux 5.10

In the Linux kernel, the following vulnerability has been resolved: TCP: fixed page frag corruption upon a page fault. Steffen reported a corruption of the TCP stream for HTTP requests served by the Apache web-server, using a CIFS mount-point and the corresponding file’s memory mapping. The root...

Astra Linux – Vulnerability in Linux 6.1

In the Linux kernel, the following vulnerability has been resolved: smb: Client: Fixed a potential Use-after-Free UAF in smb2isvalidoplockbreak. Skipped sessions that are being torn down status == SESEXITING to avoid UAF...

Astra Linux – Vulnerability in Linux 5.15

A use-after-free flaw was discovered in the smb2isstatusiotimeout function in CIFS within the Linux kernel. After CIFS transfers response data via a system call, there are still local variables pointing to the memory region. If the system call frees those pointers faster than CIFS uses them, CIFS...

Astra Linux – Vulnerability in Samba

A vulnerability was discovered in Samba, where the flaw allows SMB clients to truncate files, even with read-only permissions, when the Samba VFS module “aclxattr” is configured with “aclxattr:ignore system acls = yes”. The SMB protocol allows opening files when the client requests read-only...

Astra Linux – Vulnerabilities in Linux 5.10, Linux 5.15

In the Linux kernel, the following vulnerability has been resolved: cifs: Fixed the error in the length of the VALIDATENEGOTIATEINFO message. The commit code d5c7076b772a includes the following changes: - Added smb3.1.1 to the default dialect list. - Extended the number of dialects from 3 to 4. -...

Astra Linux – Vulnerability in Linux 6.1

In the Linux kernel, the following vulnerabilities have been resolved: ksmbd: A use-after-free issue was fixed in ksmbdsessionrpcopen. A UAF Use-After-Free issue may occur due to a race condition between ksmbdsessionrpcopen and sessionrpcclose. Adding rpclock to the session can help protect it fr...

Astra Linux – Vulnerabilities in Linux 5.10, Linux 5.15

In the Linux kernel, the following vulnerability has been resolved: cifs: Fixed an oops due to uninitialized server-smbdconn during reconnection. In smbdDestroy, the server-smbdconn pointer is cleared after freeing the smbdconnection structure it points to, so that reconnection won’t be confused...

Astra Linux – Vulnerability found in Linux 5.15, Linux 6.1

In the Linux kernel, the following vulnerability has been resolved: smb: Client: Fix deadlock in smb2findsmbtcon Unlock cifstcpseslock before calling cifsputsmbses to avoid such deadlocks...

Astra Linux – Vulnerability in Linux 6.1

In the Linux kernel, the following vulnerability has been resolved: ksmbd: When a multichannel SMB2SESSIONSETUP request with SMB2SESSIONREQFLAGBINDING fails, ksmbd sets conn-binding = true, but never clears this value during the error path. As a result, the connection remains in a binding state,...

Astra Linux – Vulnerability in Linux 5.15

A flaw was discovered in the ksmbd component of the Linux kernel, a high-performance in-kernel SMB server. The specific flaw occurs during the handling of the SMB2TREECONNECT and SMB2QUERYINFO commands. The issue arises from the lack of proper validation of a pointer before accessing it. An...

Astra Linux – Vulnerability found in Linux 6.1, Linux 5.15

In the Linux kernel, the following vulnerability has been resolved: smb: client: Fixed a potential Use-after-Free UAF in cifsdumpfullkey. Skipped sessions that are being terminated status == SESEXITING to avoid UAF...

Astra Linux – Vulnerability found in Linux 6.1, Linux 5.15

In the Linux kernel, the following vulnerability has been resolved: ksmbd: prevents out-of-bounds stream writes by validating pos. The ksmbdvfsstreamwrite function did not validate whether the write offset pos was within the bounds of the existing stream data length vlen. If pos was greater than ...

Astra Linux – Vulnerability in Linux 6.1

In the Linux kernel, the following vulnerability has been resolved: ksmbd: The issue of a null pointer dereference error in generateencryptionkey has been fixed. If a client sends two session setups with KRB5 authentication to ksmbd, a null pointer dereference error in generateencryptionkey can...

Astra Linux – Vulnerability in Samba

A flaw was discovered in the way Samba implemented SMB1 authentication. An attacker could exploit this flaw to retrieve the plain-text password sent over the network, even if Kerberos authentication was required...

Astra Linux – Vulnerability in Linux 5.15

In the Linux kernel, the following vulnerabilities have been resolved: ksmbd: Corrected the incorrect validation of the next buffer length in smb2setea. There are multiple smb2eainfo buffers in the FILEFULLEAINFORMATION request from the client. ksmbd uses the NextEntryOffset of the current...

Astra Linux – Vulnerabilities in Linux, Linux-5.10, Linux-5.15, Linux-6.1

In the Linux kernel, the following vulnerabilities have been resolved: cifs: Fixed a buffer overflow issue when parsing NFS reparse points. ReparseDataLength is the sum of the InodeType size and the DataBuffer size. To obtain the DataBuffer size, it is necessary to subtract the InodeType size fro...

Astra Linux – Vulnerabilities in Linux 5.10, Linux 5.15, Linux 6.1

In the Linux kernel, the following vulnerabilities have been resolved: smb: client: fixed potential OOBs in smb2ParseContexts Validated offsets and lengths before dereferencing to create contexts in smb2ParseContexts. This fix addresses the following OOPs when accessing invalid create contexts fr...