Astra Linux – Vulnerability in Linux, Linux 5.10

A issue was discovered in fs/nfs/dir.c in the Linux kernel before version 5.16.5. If an application sets the ODIRECTORY flag and attempts to open a regular file, nfsatomicopen performs a regular lookup. If a regular file is found, ENOTDIR should be returned; however, the server instead returns...

Astra Linux – Vulnerability in Linux 5.10

In the Linux kernel, the following vulnerability has been resolved: NFSD: Initialize the struct nfsd4copy earlier. Ensure that the refcount and asynccopies fields are initialized early. The cleanupasynccopy function will reference these fields if an error occurs in nfsd4copy. If these fields are...

Astra Linux – Vulnerability found in Linux 6.1, Linux 5.10, and Linux 5.15

In the Linux kernel, the following vulnerabilities have been resolved: cifs: Fixed a UAF in cifsdemultiplexthread There is a UAF when performing xfstests on cifs: BUG: KASAN: Use-after-free in smb2isnetworknamedeleted+0x27/0x160 Reading a size 4 value at address ffff88810103fc08 by task cifsd/923...

Astra Linux – Vulnerability in Linux, Linux 5.10

In the Linux kernel, the following vulnerability has been resolved: NFS: Fixed a potential NULL dereference in nfsgetclient. None of the callers is expected to receive a NULL return value from nfsgetclient. Therefore, this code will result in an Oops error. It’s better to return an error pointer....

Astra Linux – Vulnerability in Linux 5.10

In the Linux kernel, the following vulnerabilities have been resolved: NFSD: Fixed the handling of large file sizes in NFSv3 SETATTR/CREATE procedures. iattr::iasize is a lofft; therefore, these NFSv3 procedures must be careful to handle incoming client size values that are larger than s64max...

Astra Linux – Vulnerability in Linux 5.10, Linux

In the Linux kernel, the following vulnerability has been resolved: NFSD: prevented underflow in nfssvcdecodewriteargs Smatch reported the issue as follows: fs/nfsd/nfsxdr.c:341 nfssvcDecodeWriteArgs Warning: no lower bound on ‘args-len’ The type of the variable has been changed to unsigned to...

Astra Linux – Vulnerability in Linux 5.10

In the Linux kernel, the following vulnerability has been resolved: NFSD: The encoder for NFSv2 GETACL results has been completed. The xdrstream conversion inadvertently left some code that set the pagelen of the send buffer. The XDR stream encoders should now handle this automatically. This...

Astra Linux – Vulnerability found in Linux 5.10, Linux 6.1

In the Linux kernel, the following vulnerability has been resolved: NFSv4.2: Rework the handling of scratch space for READPLUS again. I found that the read code might send multiple requests using the same nfspgioheader. However, the nfs4procreadsetup function is only called once. As a result, we...

Astra Linux – Vulnerability in Linux, Linux 5.10

In the Linux kernel, the following vulnerability has been resolved: cifs: Prevent NULL dereferencing in cifscomposemountoptions. The optional @ref parameter may contain a NULL nodename. Therefore, prevent dereferencing it in cifscomposemountoptions. Addresses-Coverity: 1476408 “Explicit NULL...

Astra Linux – Vulnerability in Linux

A memory-bound write flaw 1 or 2 bytes of memory was identified in the Linux kernel’s NFS subsystem, related to the way users use mirroring replication of files via NFS. A user with access to the NFS mount could potentially exploit this flaw to crash the system or escalate privileges on the syste...

Astra Linux – Vulnerability found in Linux 5.10, Linux 6.1

In the Linux kernel, the following vulnerabilities have been resolved: nfs: fixed a panic that occurred when nfs4fflayoutprepareds failed. We have observed the following panics in production: BUG: NULL pointer dereferencing in the kernel, address: 0000000000000065 PGD: 2f485f067; P4D: 2f485f067;...

Astra Linux – Vulnerability in Samba

All versions of Samba prior to 4.13.16 are vulnerable to a malicious client that can exploit the race condition of SMB1 or NFS to create a directory in an area of the server file system that is not exported under the share definition. Note that SMB1 must be enabled, or the share must also be...

Astra Linux – Vulnerability in Linux 5.10

In the Linux kernel, the following vulnerability has been resolved: NFS: Fixed an error in nfsdautomount When mounting from an NFSv4 reference, path-dentry may end up being a negative dentry. Therefore, the struct nfsserver structure is derived from the dentry itself instead...

Astra Linux – Vulnerability in Linux, Linux 5.10

In the Linux kernel, the following vulnerabilities have been resolved: NFS: Fixed a use-after-free in nfs4initclient. KASAN reported a use-after-free when attempting to mount two different exports through two different NICs that belong to the same server. Olga was able to exploit this issue with...

Astra Linux – Vulnerability in Linux 6.1

In the Linux kernel, the following vulnerability has been resolved: nfsd: fixed RELEASELOCKOWNER The test on socount in nfsd4releaselockowner is pointless and harmful. revert to using checkforlocks, and change it to not sleep. Firstly, it’s harmful. As documented in the kdoc comment for...

Astra Linux - уязвимость в u-boot

A issue was discovered in Das U-Boot during the period from 2019.07. There is an unbounded memcpy operation with a failed length check at nfsreadreply, when calling storeblock in the NFSv3 case...

Astra Linux – Vulnerability in Linux

In the Linux kernel, the following vulnerability has been resolved: NFSv4: Fixed a NULL pointer dereference in pnfsmarkmatchinglsegsreturn. The commit de144ff4234f fixes the issue by changing pnfsreturnlayout to call pnfsmarkmatchinglsegsreturn, with NULL passed as the argument to the...

Astra Linux – Vulnerability in Linux

In the Linux kernel, the following vulnerability has been resolved: NFS: Do not corrupt the value of pgbyteswritten in nfsdorecoalesce The value of mirror-pgbyteswritten should only be updated after a successful attempt to flush out the requests on the list...

Astra Linux – Vulnerability in Linux

In the Linux kernel, the following vulnerabilities have been resolved: NFS: Fixed an incorrect limit in the filelayoutdecodelayout function. The value of sizeofstruct nfsfh is two bytes too large, which could lead to memory corruption. The correct value should be NFSMAXFHSIZE, as that is the size...

Astra Linux – Vulnerability in Linux 5.10

In the Linux kernel, the following vulnerabilities have been resolved: NFSv4: Fixed an error in pnfsmarkrequestcommit, when performing ODIRECT operations. Fixed an error-prone condition in pnfsmarkrequestcommit, when adding a set of write operations to the commit list in order to reschedule them...