CVE-2021-47160
net: dsa: mt7530: fix VLAN traffic leaks
Description
In the Linux kernel, the following vulnerability has been resolved: net: dsa: mt7530: fix VLAN traffic leaks PCR_MATRIX field was set to all 1's when VLAN filtering is enabled, but was not reset when it is disabled, which may cause traffic leaks: ip link add br0 type bridge vlan_filtering 1 ip link add br1 type bridge vlan_filtering 1 ip link set swp0 master br0 ip link set swp1 master br1 ip link set br0 type bridge vlan_filtering 0 ip link set br1 type bridge vlan_filtering 0 # traffic in br0 and br1 will start leaking to each other As port_bridge_{add,del} have set up PCR_MATRIX properly, remove the PCR_MATRIX write from mt7530_port_set_vlan_aware.
INFO
Published Date :
March 25, 2024, 10:15 a.m.
Last Modified :
March 13, 2025, 9:24 p.m.
Remotely Exploit :
No
Source :
416baaa9-dc9f-4396-8d5f-8c081fb06d67
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 3.1 | HIGH | [email protected] |
Solution
- There is no known solution at this time.
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-2021-47160.
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2021-47160 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-2021-47160
weaknesses.
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-2021-47160 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2021-47160 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.
-
Initial Analysis by [email protected]
Mar. 13, 2025
Action Type Old Value New Value Added CVSS V3.1 AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H Added CWE NVD-CWE-noinfo Added CPE Configuration OR *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 5.11 from (excluding) 5.12.9 *cpe:2.3:o:linux:linux_kernel:5.13:rc1:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:5.13:rc2:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:5.13:rc3:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 5.5 from (excluding) 5.10.42 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 4.20 from (excluding) 5.4.124 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 4.16 from (excluding) 4.19.193 Added Reference Type CVE: https://git.kernel.org/stable/c/474a2ddaa192777522a7499784f1d60691cd831a Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/474a2ddaa192777522a7499784f1d60691cd831a Types: Patch Added Reference Type CVE: https://git.kernel.org/stable/c/4fe4e1f48ba119bdbc7c897c83b04ba0d08f5488 Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/4fe4e1f48ba119bdbc7c897c83b04ba0d08f5488 Types: Patch Added Reference Type CVE: https://git.kernel.org/stable/c/82ae35b6c14feae5f216913d5b433e143c756d4e Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/82ae35b6c14feae5f216913d5b433e143c756d4e Types: Patch Added Reference Type CVE: https://git.kernel.org/stable/c/ae389812733b1b1e8e07fcc238e41db166b5c78d Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/ae389812733b1b1e8e07fcc238e41db166b5c78d Types: Patch Added Reference Type CVE: https://git.kernel.org/stable/c/b91117b66fe875723a4e79ec6263526fffdb44d2 Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/b91117b66fe875723a4e79ec6263526fffdb44d2 Types: 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/474a2ddaa192777522a7499784f1d60691cd831a Added Reference https://git.kernel.org/stable/c/4fe4e1f48ba119bdbc7c897c83b04ba0d08f5488 Added Reference https://git.kernel.org/stable/c/82ae35b6c14feae5f216913d5b433e143c756d4e Added Reference https://git.kernel.org/stable/c/ae389812733b1b1e8e07fcc238e41db166b5c78d Added Reference https://git.kernel.org/stable/c/b91117b66fe875723a4e79ec6263526fffdb44d2 -
CVE Modified by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
May. 28, 2024
Action Type Old Value New Value -
CVE Modified by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
May. 14, 2024
Action Type Old Value New Value -
CVE Received by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Mar. 25, 2024
Action Type Old Value New Value Added Description In the Linux kernel, the following vulnerability has been resolved: net: dsa: mt7530: fix VLAN traffic leaks PCR_MATRIX field was set to all 1's when VLAN filtering is enabled, but was not reset when it is disabled, which may cause traffic leaks: ip link add br0 type bridge vlan_filtering 1 ip link add br1 type bridge vlan_filtering 1 ip link set swp0 master br0 ip link set swp1 master br1 ip link set br0 type bridge vlan_filtering 0 ip link set br1 type bridge vlan_filtering 0 # traffic in br0 and br1 will start leaking to each other As port_bridge_{add,del} have set up PCR_MATRIX properly, remove the PCR_MATRIX write from mt7530_port_set_vlan_aware. Added Reference kernel.org https://git.kernel.org/stable/c/ae389812733b1b1e8e07fcc238e41db166b5c78d [No types assigned] Added Reference kernel.org https://git.kernel.org/stable/c/4fe4e1f48ba119bdbc7c897c83b04ba0d08f5488 [No types assigned] Added Reference kernel.org https://git.kernel.org/stable/c/b91117b66fe875723a4e79ec6263526fffdb44d2 [No types assigned] Added Reference kernel.org https://git.kernel.org/stable/c/82ae35b6c14feae5f216913d5b433e143c756d4e [No types assigned] Added Reference kernel.org https://git.kernel.org/stable/c/474a2ddaa192777522a7499784f1d60691cd831a [No types assigned]