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CVE-2023-20821

MEDIUMCVSS 6.7/10EPSS 0.09%

Last modified

CVE-2023-20821 is a medium-severity vulnerability rated 6.7/10 on the CVSS scale. 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. EPSS estimates a 0.09% chance of exploitation in the next 30 days.

Description

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.

Metrics

CVSS 3.1
6.7/10

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

EPSS Probability
0.09%

0.5th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

VendorProductVersions
LinuxfoundationYocto2.6
RdkcentralRdk-B2022q3
GoogleAndroid11.0
GoogleAndroid12.0
GoogleAndroid13.0
OpenwrtOpenwrt19.07.0
OpenwrtOpenwrt21.02.0

References

Timeline

Published
Last Modified
Status
Modified

Frequently Asked Questions

What is CVE-2023-20821?
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.
How severe is CVE-2023-20821?
CVE-2023-20821 has a CVSS score of 6.7/10 (MEDIUM severity). The EPSS model estimates a 0.09% probability of exploitation in the next 30 days.
How do I fix CVE-2023-20821?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2023-20821?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST