Attacker Value
Unknown
(0 users assessed)
Exploitability
Unknown
(0 users assessed)
User Interaction
None
Privileges Required
Low
Attack Vector
Local
0

CVE-2024-43839

Disclosure Date: August 17, 2024
Add MITRE ATT&CK tactics and techniques that apply to this CVE.

Description

In the Linux kernel, the following vulnerability has been resolved:

bna: adjust ‘name’ buf size of bna_tcb and bna_ccb structures

To have enough space to write all possible sprintf() args. Currently
‘name’ size is 16, but the first ‘%s’ specifier may already need at
least 16 characters, since ‘bnad->netdev->name’ is used there.

For ‘%d’ specifiers, assume that they require:

  • 1 char for ‘tx_id + tx_info->tcb[i]–>id’ sum, BNAD_MAX_TXQ_PER_TX is 8
  • 2 chars for ‘rx_id + rx_info->rx_ctrl[i].ccb->id’, BNAD_MAX_RXP_PER_RX
    is 16

And replace sprintf with snprintf.

Detected using the static analysis tool – Svace.

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CVSS V3 Severity and Metrics
Base Score:
7.8 High
Impact Score:
5.9
Exploitability Score:
1.8
Vector:
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Attack Vector (AV):
Local
Attack Complexity (AC):
Low
Privileges Required (PR):
Low
User Interaction (UI):
None
Scope (S):
Unchanged
Confidentiality (C):
High
Integrity (I):
High
Availability (A):
High

General Information

Vendors

  • linux

Products

  • linux kernel
Technical Analysis