// For flags

CVE-2021-47548

ethernet: hisilicon: hns: hns_dsaf_misc: fix a possible array overflow in hns_dsaf_ge_srst_by_port()

Severity Score

9.8
*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

0
*Multiple Sources

Exploited in Wild

-
*KEV

Decision

Attend
*SSVC
Descriptions

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

ethernet: hisilicon: hns: hns_dsaf_misc: fix a possible array overflow in hns_dsaf_ge_srst_by_port()

The if statement:
if (port >= DSAF_GE_NUM)
return;

limits the value of port less than DSAF_GE_NUM (i.e., 8).
However, if the value of port is 6 or 7, an array overflow could occur:
port_rst_off = dsaf_dev->mac_cb[port]->port_rst_off;

because the length of dsaf_dev->mac_cb is DSAF_MAX_PORT_NUM (i.e., 6).

To fix this possible array overflow, we first check port and if it is
greater than or equal to DSAF_MAX_PORT_NUM, the function returns.

En el kernel de Linux se ha resuelto la siguiente vulnerabilidad: ethernet: hisilicon: hns: hns_dsaf_misc: corrige un posible desbordamiento de matriz en hns_dsaf_ge_srst_by_port() La sentencia if: if (port >= DSAF_GE_NUM) return; limita el valor del puerto a menos de DSAF_GE_NUM (es decir, 8). Sin embargo, si el valor del puerto es 6 o 7, podría producirse un desbordamiento de la matriz: port_rst_off = dsaf_dev->mac_cb[port]->port_rst_off; porque la longitud de dsaf_dev->mac_cb es DSAF_MAX_PORT_NUM (es decir, 6). Para solucionar este posible desbordamiento de la matriz, primero verificamos el puerto y si es mayor o igual a DSAF_MAX_PORT_NUM, la función regresa.

*Credits: N/A
CVSS Scores
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High
Attack Vector
Network
Attack Complexity
Low
Privileges Required
High
User Interaction
None
Scope
Unchanged
Confidentiality
Low
Integrity
Low
Availability
High
* Common Vulnerability Scoring System
SSVC
  • Decision:Attend
Exploitation
None
Automatable
Yes
Tech. Impact
Total
* Organization's Worst-case Scenario
Timeline
  • 2024-05-24 CVE Reserved
  • 2024-05-24 CVE Published
  • 2024-05-25 EPSS Updated
  • 2024-08-04 CVE Updated
  • ---------- Exploited in Wild
  • ---------- KEV Due Date
  • ---------- First Exploit
CWE
  • CWE-129: Improper Validation of Array Index
CAPEC
Affected Vendors, Products, and Versions
Vendor Product Version Other Status
Vendor Product Version Other Status <-- --> Vendor Product Version Other Status
Linux
Search vendor "Linux"
 Linux Kernel
Search vendor "Linux" for product "Linux Kernel"
 < 4.9.292
Search vendor "Linux" for product "Linux Kernel" and version " < 4.9.292"
en
Affected
Linux
Search vendor "Linux"
 Linux Kernel
Search vendor "Linux" for product "Linux Kernel"
 < 4.14.257
Search vendor "Linux" for product "Linux Kernel" and version " < 4.14.257"
en
Affected
Linux
Search vendor "Linux"
 Linux Kernel
Search vendor "Linux" for product "Linux Kernel"
 < 4.19.220
Search vendor "Linux" for product "Linux Kernel" and version " < 4.19.220"
en
Affected
Linux
Search vendor "Linux"
 Linux Kernel
Search vendor "Linux" for product "Linux Kernel"
 < 5.4.164
Search vendor "Linux" for product "Linux Kernel" and version " < 5.4.164"
en
Affected
Linux
Search vendor "Linux"
 Linux Kernel
Search vendor "Linux" for product "Linux Kernel"
 < 5.10.84
Search vendor "Linux" for product "Linux Kernel" and version " < 5.10.84"
en
Affected
Linux
Search vendor "Linux"
 Linux Kernel
Search vendor "Linux" for product "Linux Kernel"
 < 5.15.7
Search vendor "Linux" for product "Linux Kernel" and version " < 5.15.7"
en
Affected
Linux
Search vendor "Linux"
 Linux Kernel
Search vendor "Linux" for product "Linux Kernel"
 < 5.16
Search vendor "Linux" for product "Linux Kernel" and version " < 5.16"
en
Affected