medium
6.7
CWE
787
Advisory Published
Updated

CVE-2023-20821

First published: Mon Sep 04 2023(Updated: )

In nvram, there is a possible out of bounds write due to a missing bounds check. This could lead to local escalation of privilege with System execution privileges needed. User interaction is not needed for exploitation. Patch ID: ALPS07937113; Issue ID: ALPS07937113.

Credit: security@mediatek.com security@mediatek.com

Affected SoftwareAffected VersionHow to fix
Linuxfoundation Yocto=2.6
Rdkcentral Rdk-b=2022q3
Google Android=11.0
Google Android=12.0
Google Android=13.0
OpenWrt OpenWrt=19.07.0
OpenWrt OpenWrt=21.02.0
Mediatek Mt2713
Mediatek Mt2735
Mediatek Mt6833
Mediatek Mt6835
Mediatek Mt6853
Mediatek Mt6855
Mediatek Mt6873
Mediatek Mt6875
Mediatek Mt6877
Mediatek Mt6879
Mediatek Mt6880
Mediatek Mt6883
Mediatek Mt6885
Mediatek Mt6886
Mediatek Mt6889
Mediatek Mt6890
Mediatek Mt6891
Mediatek Mt6893
Mediatek Mt6895
Mediatek Mt6980
Mediatek Mt6983
Mediatek Mt6985
Mediatek Mt6990
Mediatek Mt8167
Mediatek Mt8167s
Mediatek Mt8168
Mediatek Mt8173
Mediatek Mt8175
Mediatek Mt8185
Mediatek Mt8188
Mediatek Mt8195
Mediatek Mt8321
Mediatek Mt8362a
Mediatek Mt8365
Mediatek Mt8385
Mediatek Mt8395
Mediatek Mt8666
Mediatek Mt8673
Mediatek Mt8675
Mediatek Mt8765
Mediatek Mt8766
Mediatek Mt8768
Mediatek Mt8781
Mediatek Mt8786
Mediatek Mt8788
Mediatek Mt8789
Mediatek Mt8791
Mediatek Mt8791t
Mediatek Mt8797
All of
Any of
Linuxfoundation Yocto=2.6
Rdkcentral Rdk-b=2022q3
Google Android=11.0
Google Android=12.0
Google Android=13.0
OpenWrt OpenWrt=19.07.0
OpenWrt OpenWrt=21.02.0
Any of
Mediatek Mt2713
Mediatek Mt2735
Mediatek Mt6833
Mediatek Mt6835
Mediatek Mt6853
Mediatek Mt6855
Mediatek Mt6873
Mediatek Mt6875
Mediatek Mt6877
Mediatek Mt6879
Mediatek Mt6880
Mediatek Mt6883
Mediatek Mt6885
Mediatek Mt6886
Mediatek Mt6889
Mediatek Mt6890
Mediatek Mt6891
Mediatek Mt6893
Mediatek Mt6895
Mediatek Mt6980
Mediatek Mt6983
Mediatek Mt6985
Mediatek Mt6990
Mediatek Mt8167
Mediatek Mt8167s
Mediatek Mt8168
Mediatek Mt8173
Mediatek Mt8175
Mediatek Mt8185
Mediatek Mt8188
Mediatek Mt8195
Mediatek Mt8321
Mediatek Mt8362a
Mediatek Mt8365
Mediatek Mt8385
Mediatek Mt8395
Mediatek Mt8666
Mediatek Mt8673
Mediatek Mt8675
Mediatek Mt8765
Mediatek Mt8766
Mediatek Mt8768
Mediatek Mt8781
Mediatek Mt8786
Mediatek Mt8788
Mediatek Mt8789
Mediatek Mt8791
Mediatek Mt8791t
Mediatek Mt8797

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Reference Links

Frequently Asked Questions

  • What is CVE-2023-20821?

    CVE-2023-20821 is a vulnerability in nvram that allows for a possible out of bounds write due to a missing bounds check, potentially leading to local escalation of privilege.

  • How severe is CVE-2023-20821?

    CVE-2023-20821 has a severity rating of 6.7 out of 10, which is considered medium severity.

  • What software is affected by CVE-2023-20821?

    The affected software includes Linuxfoundation Yocto 2.6, Rdkcentral Rdk-b 2022q3, Google Android 11.0, Google Android 12.0, Google Android 13.0, Openwrt Openwrt 19.07.0, and Openwrt Openwrt 21.02.0.

  • Is user interaction required to exploit CVE-2023-20821?

    No, user interaction is not needed for exploitation of CVE-2023-20821.

  • How can CVE-2023-20821 be patched?

    To patch CVE-2023-20821, apply the provided Patch ID: ALPS07937113 or Issue ID: ALPS07937113.

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