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CVE-2021-47160

UNKNOWN
Published 2024-03-25T09:16:14.468Z
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No CVSS data available

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.

Available Exploits

No exploits available for this CVE.

Related News

No news articles found for this CVE.

Affected Products

Linux

Linux

Affected Versions:

83163f7dca5684816d01c8ccf4857aa74801e7b7 83163f7dca5684816d01c8ccf4857aa74801e7b7 83163f7dca5684816d01c8ccf4857aa74801e7b7 83163f7dca5684816d01c8ccf4857aa74801e7b7 83163f7dca5684816d01c8ccf4857aa74801e7b7
Linux

Linux

Affected Versions:

4.16 0 4.19.193 5.4.124 5.10.42 5.12.9 5.13

GitHub Security Advisories

Community-driven vulnerability intelligence from GitHub

⚠ Unreviewed HIGH

GHSA-9r37-jj74-qvw9

Advisory Details

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.

CVSS Scoring

CVSS Score

7.5

CVSS Vector

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H

References

ADVISORY https://nvd.nist.gov/vuln/detail/CVE-2021-47160
WEB https://git.kernel.org/stable/c/474a2ddaa192777522a7499784f1d60691cd831a
WEB https://git.kernel.org/stable/c/4fe4e1f48ba119bdbc7c897c83b04ba0d08f5488
WEB https://git.kernel.org/stable/c/82ae35b6c14feae5f216913d5b433e143c756d4e
WEB https://git.kernel.org/stable/c/ae389812733b1b1e8e07fcc238e41db166b5c78d
WEB https://git.kernel.org/stable/c/b91117b66fe875723a4e79ec6263526fffdb44d2

Advisory provided by GitHub Security Advisory Database. Published: March 25, 2024, Modified: March 13, 2025

References

https://git.kernel.org/stable/c/ae389812733b1b1e8e07fcc238e41db166b5c78d
https://git.kernel.org/stable/c/4fe4e1f48ba119bdbc7c897c83b04ba0d08f5488
https://git.kernel.org/stable/c/b91117b66fe875723a4e79ec6263526fffdb44d2
https://git.kernel.org/stable/c/82ae35b6c14feae5f216913d5b433e143c756d4e
https://git.kernel.org/stable/c/474a2ddaa192777522a7499784f1d60691cd831a
Published: 2024-03-25T09:16:14.468Z
Last Modified: 2025-05-04T07:05:19.037Z
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