CVE-2021-47549
"Freescale Semiconductor SATA driver UAF in sata_fsl_port_stop when removing module"
Description
In the Linux kernel, the following vulnerability has been resolved: sata_fsl: fix UAF in sata_fsl_port_stop when rmmod sata_fsl When the `rmmod sata_fsl.ko` command is executed in the PPC64 GNU/Linux, a bug is reported: ================================================================== BUG: Unable to handle kernel data access on read at 0x80000800805b502c Oops: Kernel access of bad area, sig: 11 [#1] NIP [c0000000000388a4] .ioread32+0x4/0x20 LR [80000000000c6034] .sata_fsl_port_stop+0x44/0xe0 [sata_fsl] Call Trace: .free_irq+0x1c/0x4e0 (unreliable) .ata_host_stop+0x74/0xd0 [libata] .release_nodes+0x330/0x3f0 .device_release_driver_internal+0x178/0x2c0 .driver_detach+0x64/0xd0 .bus_remove_driver+0x70/0xf0 .driver_unregister+0x38/0x80 .platform_driver_unregister+0x14/0x30 .fsl_sata_driver_exit+0x18/0xa20 [sata_fsl] .__se_sys_delete_module+0x1ec/0x2d0 .system_call_exception+0xfc/0x1f0 system_call_common+0xf8/0x200 ================================================================== The triggering of the BUG is shown in the following stack: driver_detach device_release_driver_internal __device_release_driver drv->remove(dev) --> platform_drv_remove/platform_remove drv->remove(dev) --> sata_fsl_remove iounmap(host_priv->hcr_base); <---- unmap kfree(host_priv); <---- free devres_release_all release_nodes dr->node.release(dev, dr->data) --> ata_host_stop ap->ops->port_stop(ap) --> sata_fsl_port_stop ioread32(hcr_base + HCONTROL) <---- UAF host->ops->host_stop(host) The iounmap(host_priv->hcr_base) and kfree(host_priv) functions should not be executed in drv->remove. These functions should be executed in host_stop after port_stop. Therefore, we move these functions to the new function sata_fsl_host_stop and bind the new function to host_stop.
INFO
Published Date :
May 24, 2024, 3:15 p.m.
Last Modified :
Jan. 7, 2025, 5:04 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
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CVE-2021-47549.
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The following list is the news that have been mention
CVE-2021-47549 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2021-47549 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. 07, 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) 2.6.24 up to (excluding) 4.4.294 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 4.5 up to (excluding) 4.9.292 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 4.10 up to (excluding) 4.14.257 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 4.15 up to (excluding) 4.19.220 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 4.20 up to (excluding) 5.4.164 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 5.5 up to (excluding) 5.10.84 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 5.11 up to (excluding) 5.15.7 *cpe:2.3:o:linux:linux_kernel:5.16:rc1:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:5.16:rc2:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:5.16:rc3:*:*:*:*:*:* Changed Reference Type https://git.kernel.org/stable/c/0769449b0a5eabc3545337217ae690e46673e73a No Types Assigned https://git.kernel.org/stable/c/0769449b0a5eabc3545337217ae690e46673e73a Patch Changed Reference Type https://git.kernel.org/stable/c/0769449b0a5eabc3545337217ae690e46673e73a No Types Assigned https://git.kernel.org/stable/c/0769449b0a5eabc3545337217ae690e46673e73a Patch Changed Reference Type https://git.kernel.org/stable/c/325ea49fc43cbc03a5e1e37de8f0ca6357ced4b1 No Types Assigned https://git.kernel.org/stable/c/325ea49fc43cbc03a5e1e37de8f0ca6357ced4b1 Patch Changed Reference Type https://git.kernel.org/stable/c/325ea49fc43cbc03a5e1e37de8f0ca6357ced4b1 No Types Assigned https://git.kernel.org/stable/c/325ea49fc43cbc03a5e1e37de8f0ca6357ced4b1 Patch Changed Reference Type https://git.kernel.org/stable/c/4a46b2f5dce02539e88a300800812bd24a45e097 No Types Assigned https://git.kernel.org/stable/c/4a46b2f5dce02539e88a300800812bd24a45e097 Patch Changed Reference Type https://git.kernel.org/stable/c/4a46b2f5dce02539e88a300800812bd24a45e097 No Types Assigned https://git.kernel.org/stable/c/4a46b2f5dce02539e88a300800812bd24a45e097 Patch Changed Reference Type https://git.kernel.org/stable/c/6c8ad7e8cf29eb55836e7a0215f967746ab2b504 No Types Assigned https://git.kernel.org/stable/c/6c8ad7e8cf29eb55836e7a0215f967746ab2b504 Patch Changed Reference Type https://git.kernel.org/stable/c/6c8ad7e8cf29eb55836e7a0215f967746ab2b504 No Types Assigned https://git.kernel.org/stable/c/6c8ad7e8cf29eb55836e7a0215f967746ab2b504 Patch Changed Reference Type https://git.kernel.org/stable/c/77393806c76b6b44f1c44bd957788c8bd9152c45 No Types Assigned https://git.kernel.org/stable/c/77393806c76b6b44f1c44bd957788c8bd9152c45 Patch Changed Reference Type https://git.kernel.org/stable/c/77393806c76b6b44f1c44bd957788c8bd9152c45 No Types Assigned https://git.kernel.org/stable/c/77393806c76b6b44f1c44bd957788c8bd9152c45 Patch Changed Reference Type https://git.kernel.org/stable/c/91ba94d3f7afca195b224f77a72044fbde1389ce No Types Assigned https://git.kernel.org/stable/c/91ba94d3f7afca195b224f77a72044fbde1389ce Patch Changed Reference Type https://git.kernel.org/stable/c/91ba94d3f7afca195b224f77a72044fbde1389ce No Types Assigned https://git.kernel.org/stable/c/91ba94d3f7afca195b224f77a72044fbde1389ce Patch Changed Reference Type https://git.kernel.org/stable/c/adf098e2a8a1e1fc075d6a5ba2edd13cf7189082 No Types Assigned https://git.kernel.org/stable/c/adf098e2a8a1e1fc075d6a5ba2edd13cf7189082 Patch Changed Reference Type https://git.kernel.org/stable/c/adf098e2a8a1e1fc075d6a5ba2edd13cf7189082 No Types Assigned https://git.kernel.org/stable/c/adf098e2a8a1e1fc075d6a5ba2edd13cf7189082 Patch Changed Reference Type https://git.kernel.org/stable/c/cdcd80292106df5cda325426e96495503e41f947 No Types Assigned https://git.kernel.org/stable/c/cdcd80292106df5cda325426e96495503e41f947 Patch Changed Reference Type https://git.kernel.org/stable/c/cdcd80292106df5cda325426e96495503e41f947 No Types Assigned https://git.kernel.org/stable/c/cdcd80292106df5cda325426e96495503e41f947 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/0769449b0a5eabc3545337217ae690e46673e73a Added Reference https://git.kernel.org/stable/c/325ea49fc43cbc03a5e1e37de8f0ca6357ced4b1 Added Reference https://git.kernel.org/stable/c/4a46b2f5dce02539e88a300800812bd24a45e097 Added Reference https://git.kernel.org/stable/c/6c8ad7e8cf29eb55836e7a0215f967746ab2b504 Added Reference https://git.kernel.org/stable/c/77393806c76b6b44f1c44bd957788c8bd9152c45 Added Reference https://git.kernel.org/stable/c/91ba94d3f7afca195b224f77a72044fbde1389ce Added Reference https://git.kernel.org/stable/c/adf098e2a8a1e1fc075d6a5ba2edd13cf7189082 Added Reference https://git.kernel.org/stable/c/cdcd80292106df5cda325426e96495503e41f947 -
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. 24, 2024
Action Type Old Value New Value Added Description In the Linux kernel, the following vulnerability has been resolved: sata_fsl: fix UAF in sata_fsl_port_stop when rmmod sata_fsl When the `rmmod sata_fsl.ko` command is executed in the PPC64 GNU/Linux, a bug is reported: ================================================================== BUG: Unable to handle kernel data access on read at 0x80000800805b502c Oops: Kernel access of bad area, sig: 11 [#1] NIP [c0000000000388a4] .ioread32+0x4/0x20 LR [80000000000c6034] .sata_fsl_port_stop+0x44/0xe0 [sata_fsl] Call Trace: .free_irq+0x1c/0x4e0 (unreliable) .ata_host_stop+0x74/0xd0 [libata] .release_nodes+0x330/0x3f0 .device_release_driver_internal+0x178/0x2c0 .driver_detach+0x64/0xd0 .bus_remove_driver+0x70/0xf0 .driver_unregister+0x38/0x80 .platform_driver_unregister+0x14/0x30 .fsl_sata_driver_exit+0x18/0xa20 [sata_fsl] .__se_sys_delete_module+0x1ec/0x2d0 .system_call_exception+0xfc/0x1f0 system_call_common+0xf8/0x200 ================================================================== The triggering of the BUG is shown in the following stack: driver_detach device_release_driver_internal __device_release_driver drv->remove(dev) --> platform_drv_remove/platform_remove drv->remove(dev) --> sata_fsl_remove iounmap(host_priv->hcr_base); <---- unmap kfree(host_priv); <---- free devres_release_all release_nodes dr->node.release(dev, dr->data) --> ata_host_stop ap->ops->port_stop(ap) --> sata_fsl_port_stop ioread32(hcr_base + HCONTROL) <---- UAF host->ops->host_stop(host) The iounmap(host_priv->hcr_base) and kfree(host_priv) functions should not be executed in drv->remove. These functions should be executed in host_stop after port_stop. Therefore, we move these functions to the new function sata_fsl_host_stop and bind the new function to host_stop. Added Reference kernel.org https://git.kernel.org/stable/c/cdcd80292106df5cda325426e96495503e41f947 [No types assigned] Added Reference kernel.org https://git.kernel.org/stable/c/91ba94d3f7afca195b224f77a72044fbde1389ce [No types assigned] Added Reference kernel.org https://git.kernel.org/stable/c/325ea49fc43cbc03a5e1e37de8f0ca6357ced4b1 [No types assigned] Added Reference kernel.org https://git.kernel.org/stable/c/0769449b0a5eabc3545337217ae690e46673e73a [No types assigned] Added Reference kernel.org https://git.kernel.org/stable/c/77393806c76b6b44f1c44bd957788c8bd9152c45 [No types assigned] Added Reference kernel.org https://git.kernel.org/stable/c/4a46b2f5dce02539e88a300800812bd24a45e097 [No types assigned] Added Reference kernel.org https://git.kernel.org/stable/c/adf098e2a8a1e1fc075d6a5ba2edd13cf7189082 [No types assigned] Added Reference kernel.org https://git.kernel.org/stable/c/6c8ad7e8cf29eb55836e7a0215f967746ab2b504 [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-2021-47549 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-2021-47549
weaknesses.