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CVE-2021-3404

HIGHCVSS 7.8/10EPSS 1.93%

Last modified

CVE-2021-3404 is a high-severity vulnerability rated 7.8/10 on the CVSS scale. In ytnef 1.9.3, the SwapWord function in lib/ytnef.c allows remote attackers to cause a denial-of-service (and potentially code execution) due to a heap buffer overflow which can be triggered via a crafted file.. EPSS estimates a 1.93% chance of exploitation in the next 30 days.

Description

In ytnef 1.9.3, the SwapWord function in lib/ytnef.c allows remote attackers to cause a denial-of-service (and potentially code execution) due to a heap buffer overflow which can be triggered via a crafted file.

Metrics

CVSS 3.1
7.8/10

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

EPSS Probability
1.93%

77.4th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

VendorProductVersions
Ytnef ProjectYtnef1.9.3
RedhatEnterprise Linux7.0
FedoraprojectFedora33

References

Timeline

Published
Last Modified
Status
Modified

Frequently Asked Questions

What is CVE-2021-3404?
In ytnef 1.9.3, the SwapWord function in lib/ytnef.c allows remote attackers to cause a denial-of-service (and potentially code execution) due to a heap buffer overflow which can be triggered via a crafted file.
How severe is CVE-2021-3404?
CVE-2021-3404 has a CVSS score of 7.8/10 (HIGH severity). The EPSS model estimates a 1.93% probability of exploitation in the next 30 days.
How do I fix CVE-2021-3404?
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-2021-3404?

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

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Source: NVD / NIST