8.8 HIGH
- CVSS version (CVSS): 3.1
- Attack Vector (AV): Adjacent (A)
- Attack Complexity (AC): Low (L)
- Privileges Required (PR): None (N)
- User Interaction (UI): None (N)
- Scope (S): Unchanged (U)
- Confidentiality (C): High (H)
- Integrity (I): High (H)
- Availability (A): High (H)
- Modified Attack Vector (MAV): Adjacent (A)
- Modified Attack Complexity (MAC): Low (L)
- Modified Privileges Required (MPR): None (N)
- Modified User Interaction (MUI): None (N)
- Modified Confidentiality (MC): High (H)
- Modified Scope (MS): Unchanged (U)
- Modified Integrity (MI): High (H)
- Modified Availability (MA): High (H)
Activity log
- Created & dismissed (max. allowed matches exceeded) suggestion
nfc: hci: fix out-of-bounds read in HCP header parsing
In the Linux kernel, the following vulnerability has been resolved: nfc: hci: fix out-of-bounds read in HCP header parsing Both nfc_hci_recv_from_llc() and nci_hci_data_received_cb() read packet->header from skb->data at function entry without first checking that the buffer holds at least one byte. A malicious NFC peer can send a 0-byte HCP frame that passes through the SHDLC layer and reaches these functions, causing an out-of-bounds heap read of packet->header. The same 0-byte frame, if queued as a non-final fragment, also causes the reassembly loop to underflow msg_len to UINT_MAX, triggering skb_over_panic() when the reassembled skb is written. Fix this by adding a pskb_may_pull() check at the entry of each function before packet->header is first accessed. The existing pskb_may_pull() checks before the reassembled hcp_skb is cast to struct hcp_packet remain in place to guard the 2-byte HCP message header.
References
Affected products
- <1905f5ec3641b2b234bb63549c8ca11ab85466eb
- =<5.10.*
- =<6.18.*
- =<7.0.*
- <22d41b176b9989efd21c3b2d3abf6728f05b9d9a
- <f040e590c035bfd9553fe79ee9585caf1b14d67b
- ==3.5
- =<6.12.*
- <37382293f174b82a0616c8295e32b1fc8e13d1ed
- <ed6d5d97dad0334a7f43d218753429cbe2f70a4f
- <83b1362edc9d6ae376c6f36da116e2c70f2e70a6
- =<6.1.*
- <c4cc6b3b0013acb3ed0b2b60e57dfae98647fe98
- <3.5
- =<6.6.*
- =<*
- =<5.15.*
- <b99366d74b535d0cadb1ef73e04639415d9ff3b7