CVE-2021-47459
"CAN: J1939 Use After Free Vulnerability in Linux Kernel"
Description
In the Linux kernel, the following vulnerability has been resolved: can: j1939: j1939_netdev_start(): fix UAF for rx_kref of j1939_priv It will trigger UAF for rx_kref of j1939_priv as following. cpu0 cpu1 j1939_sk_bind(socket0, ndev0, ...) j1939_netdev_start j1939_sk_bind(socket1, ndev0, ...) j1939_netdev_start j1939_priv_set j1939_priv_get_by_ndev_locked j1939_jsk_add ..... j1939_netdev_stop kref_put_lock(&priv->rx_kref, ...) kref_get(&priv->rx_kref, ...) REFCOUNT_WARN("addition on 0;...") ==================================================== refcount_t: addition on 0; use-after-free. WARNING: CPU: 1 PID: 20874 at lib/refcount.c:25 refcount_warn_saturate+0x169/0x1e0 RIP: 0010:refcount_warn_saturate+0x169/0x1e0 Call Trace: j1939_netdev_start+0x68b/0x920 j1939_sk_bind+0x426/0xeb0 ? security_socket_bind+0x83/0xb0 The rx_kref's kref_get() and kref_put() should use j1939_netdev_lock to protect.
INFO
Published Date :
May 22, 2024, 7:15 a.m.
Last Modified :
Jan. 14, 2025, 5:32 p.m.
Source :
416baaa9-dc9f-4396-8d5f-8c081fb06d67
Remotely Exploitable :
No
Impact Score :
5.9
Exploitability Score :
1.8
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2021-47459.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2021-47459 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2021-47459 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
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Initial Analysis by [email protected]
Jan. 14, 2025
Action Type Old Value New Value Added CVSS V3.1 NIST AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H Added CWE NIST CWE-416 Added CPE Configuration OR *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 5.4 up to (excluding) 5.4.156 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 5.5 up to (excluding) 5.10.76 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 5.11 up to (excluding) 5.14.15 *cpe:2.3:o:linux:linux_kernel:5.15:rc1:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:5.15:rc2:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:5.15:rc3:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:5.15:rc4:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:5.15:rc5:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:5.15:rc6:*:*:*:*:*:* Changed Reference Type https://git.kernel.org/stable/c/6e8811707e2df0c6ba920f0cad3a3bca7b42132f No Types Assigned https://git.kernel.org/stable/c/6e8811707e2df0c6ba920f0cad3a3bca7b42132f Patch Changed Reference Type https://git.kernel.org/stable/c/6e8811707e2df0c6ba920f0cad3a3bca7b42132f No Types Assigned https://git.kernel.org/stable/c/6e8811707e2df0c6ba920f0cad3a3bca7b42132f Patch Changed Reference Type https://git.kernel.org/stable/c/864e77771a24c877aaf53aee019f78619cbcd668 No Types Assigned https://git.kernel.org/stable/c/864e77771a24c877aaf53aee019f78619cbcd668 Patch Changed Reference Type https://git.kernel.org/stable/c/864e77771a24c877aaf53aee019f78619cbcd668 No Types Assigned https://git.kernel.org/stable/c/864e77771a24c877aaf53aee019f78619cbcd668 Patch Changed Reference Type https://git.kernel.org/stable/c/a0e47d2833b4f65e6c799f28c6b636d36b8b936d No Types Assigned https://git.kernel.org/stable/c/a0e47d2833b4f65e6c799f28c6b636d36b8b936d Patch Changed Reference Type https://git.kernel.org/stable/c/a0e47d2833b4f65e6c799f28c6b636d36b8b936d No Types Assigned https://git.kernel.org/stable/c/a0e47d2833b4f65e6c799f28c6b636d36b8b936d Patch Changed Reference Type https://git.kernel.org/stable/c/d9d52a3ebd284882f5562c88e55991add5d01586 No Types Assigned https://git.kernel.org/stable/c/d9d52a3ebd284882f5562c88e55991add5d01586 Patch Changed Reference Type https://git.kernel.org/stable/c/d9d52a3ebd284882f5562c88e55991add5d01586 No Types Assigned https://git.kernel.org/stable/c/d9d52a3ebd284882f5562c88e55991add5d01586 Patch -
CVE Modified by af854a3a-2127-422b-91ae-364da2661108
Nov. 21, 2024
Action Type Old Value New Value Added Reference https://git.kernel.org/stable/c/6e8811707e2df0c6ba920f0cad3a3bca7b42132f Added Reference https://git.kernel.org/stable/c/864e77771a24c877aaf53aee019f78619cbcd668 Added Reference https://git.kernel.org/stable/c/a0e47d2833b4f65e6c799f28c6b636d36b8b936d Added Reference https://git.kernel.org/stable/c/d9d52a3ebd284882f5562c88e55991add5d01586 -
CVE Modified by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
May. 28, 2024
Action Type Old Value New Value -
CVE Received by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
May. 22, 2024
Action Type Old Value New Value Added Description In the Linux kernel, the following vulnerability has been resolved: can: j1939: j1939_netdev_start(): fix UAF for rx_kref of j1939_priv It will trigger UAF for rx_kref of j1939_priv as following. cpu0 cpu1 j1939_sk_bind(socket0, ndev0, ...) j1939_netdev_start j1939_sk_bind(socket1, ndev0, ...) j1939_netdev_start j1939_priv_set j1939_priv_get_by_ndev_locked j1939_jsk_add ..... j1939_netdev_stop kref_put_lock(&priv->rx_kref, ...) kref_get(&priv->rx_kref, ...) REFCOUNT_WARN("addition on 0;...") ==================================================== refcount_t: addition on 0; use-after-free. WARNING: CPU: 1 PID: 20874 at lib/refcount.c:25 refcount_warn_saturate+0x169/0x1e0 RIP: 0010:refcount_warn_saturate+0x169/0x1e0 Call Trace: j1939_netdev_start+0x68b/0x920 j1939_sk_bind+0x426/0xeb0 ? security_socket_bind+0x83/0xb0 The rx_kref's kref_get() and kref_put() should use j1939_netdev_lock to protect. Added Reference kernel.org https://git.kernel.org/stable/c/a0e47d2833b4f65e6c799f28c6b636d36b8b936d [No types assigned] Added Reference kernel.org https://git.kernel.org/stable/c/864e77771a24c877aaf53aee019f78619cbcd668 [No types assigned] Added Reference kernel.org https://git.kernel.org/stable/c/6e8811707e2df0c6ba920f0cad3a3bca7b42132f [No types assigned] Added Reference kernel.org https://git.kernel.org/stable/c/d9d52a3ebd284882f5562c88e55991add5d01586 [No types assigned]
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2021-47459 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2021-47459
weaknesses.