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CVE-2021-28831

HIGHCVSS 7.5/10EPSS 2.79%

Last modified

CVE-2021-28831 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. decompress_gunzip.c in BusyBox through 1.32.1 mishandles the error bit on the huft_build result pointer, with a resultant invalid free or segmentation fault, via malformed gzip data.. EPSS estimates a 2.79% chance of exploitation in the next 30 days.

Description

decompress_gunzip.c in BusyBox through 1.32.1 mishandles the error bit on the huft_build result pointer, with a resultant invalid free or segmentation fault, via malformed gzip data.

Metrics

CVSS 3.1
7.5/10

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

EPSS Probability
2.79%

84.6th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

VendorProductVersions
BusyboxBusybox>= 1.32.0, <= 1.32.1
FedoraprojectFedora32
FedoraprojectFedora33
FedoraprojectFedora34
DebianDebian Linux9.0

References

Timeline

Published
Last Modified
Status
Modified

Frequently Asked Questions

What is CVE-2021-28831?
decompress_gunzip.c in BusyBox through 1.32.1 mishandles the error bit on the huft_build result pointer, with a resultant invalid free or segmentation fault, via malformed gzip data.
How severe is CVE-2021-28831?
CVE-2021-28831 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 2.79% probability of exploitation in the next 30 days.
How do I fix CVE-2021-28831?
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-2021-28831?

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

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Source: NVD / NIST