| CVE |
Vendors |
Products |
Updated |
CVSS v3.1 |
| Exposure of sensitive information to an unauthorized actor in Windows Client Side Caching driver (csc.sys) allows an authorized attacker to disclose information locally. |
| Heap-based buffer overflow in Windows System Information Console allows an unauthorized attacker to execute code over a network. |
| Stack-based buffer overflow in Windows Resilient File System (ReFS) allows an unauthorized attacker to bypass a security feature with a physical attack. |
| Out-of-bounds read in Windows HTTP.sys allows an authorized attacker to disclose information locally. |
| Heap-based buffer overflow in Windows OLE DB allows an unauthorized attacker to elevate privileges over a network. |
| In the Linux kernel, the following vulnerability has been resolved:
smb: client: reject SetEA requests that do not fit the request buffer
CIFSSMBSetEA() copies the caller's extended attribute value into the
SMB request buffer without checking that it fits. The requirement is
stated in the source but was never implemented:
/*BB add length check to see if it would fit in
negotiated SMB buffer size BB */
/* if (ea_value_len > buffer_size - 512 (enough for header)) */
if (ea_value_len)
memcpy(parm_data->list.name + name_len + 1,
ea_value, ea_value_len);
The only bound applied on the way in is in cifs_xattr_set():
#define MAX_EA_VALUE_SIZE CIFSMaxBufSize
...
if (size > MAX_EA_VALUE_SIZE)
CIFSMaxBufSize is the full payload capacity of the buffer, so a value
of exactly that size leaves no room for the SMB header, the TRANS2
parameter block, the fealist header and the EA name that are written
ahead of it in the same object.
SendReceive() already enforces the correct limit on this very length:
if (in_len > CIFSMaxBufSize + MAX_CIFS_HDR_SIZE)
but it is called after the copy has taken place. An unprivileged
setxattr(2) on an SMB1 mount with a 250-byte name and a 16384-byte
value writes 16384 bytes starting 345 bytes into a 16588-byte
cifs_request object, ending 141 bytes past it:
BUG: KASAN: slab-out-of-bounds in CIFSSMBSetEA+0xabc/0xde0
Write of size 16384 at addr ffff888003aa0159 by task init/68
__asan_memcpy+0x3c/0x60
CIFSSMBSetEA+0xabc/0xde0
cifs_xattr_set+0xd3a/0xff0
__vfs_setxattr+0x13e/0x1a0
The buggy address is located 345 bytes inside of
allocated 16588-byte region
Apply SendReceive()'s limit to the assembled request before the copy
rather than after it, and widen the byte counters so the sum cannot
wrap before it is tested.
byte_count is also tested against U16_MAX, because it is stored in the
16-bit pSMB->ByteCount. That becomes reachable when CIFSMaxBufSize is
raised at module load, where it may be set as high as 1024*127: with a
5-byte EA name and a 65521-byte value, count is exactly U16_MAX while
byte_count is 65556, and cpu_to_le16() would truncate it to 20 and
transmit a frame whose ByteCount does not match its length. Testing
byte_count covers count as well, since byte_count is the larger of the
two and count's only 16-bit consumer is written after this point.
check_add_overflow() is evaluated first so that total_len is assigned
before it is reported. |
| Out-of-bounds read in Network Device Enrollment Service (NDES) allows an unauthorized attacker to deny service over a network. |
| Heap-based buffer overflow in Windows Storage Port Driver allows an unauthorized attacker to elevate privileges with a physical attack. |
| Out-of-bounds read in Windows Spaceport.sys allows an authorized attacker to elevate privileges locally. |
| Out-of-bounds read in Network Device Enrollment Service (NDES) allows an unauthorized attacker to deny service over a network. |
| Heap-based buffer overflow in Windows UI Immersive Server allows an authorized attacker to elevate privileges locally. |
| Heap-based buffer overflow in Windows Win32K - GRFX allows an authorized attacker to elevate privileges locally. |
| Heap-based buffer overflow in Windows Universal Plug and Play (UPnP) Device Host allows an authorized attacker to elevate privileges locally. |
| Heap-based buffer overflow in Windows TCP/IP allows an authorized attacker to elevate privileges locally. |
| Insufficient granularity of access control in Windows Mobile Device Management allows an authorized attacker to perform tampering locally. |
| Out-of-bounds read in Windows Hyper-V allows an authorized attacker to elevate privileges locally. |
| Heap-based buffer overflow in Windows Volume Manager Extension Driver allows an unauthorized attacker to execute code over a network. |
| Out-of-bounds read in Windows Device Association Service allows an authorized attacker to disclose information locally. |
| Insufficient granularity of access control in Windows StateRepository API allows an authorized attacker to elevate privileges locally. |
| Heap-based buffer overflow in Windows Distributed File System (DFS) allows an authorized attacker to execute code over a network. |
