CVE-2021-3404

7.8 HIGH

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...

Published: 2021-03-04 · Last updated: 2026-06-17

Severity and scoring

CVSS: 7.8 HIGH
Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
CWE: CWE-119, CWE-787

Affected products

Vendor	Product
fedoraproject	enterprise_linux, fedora, ytnef
redhat	enterprise_linux, fedora, ytnef
ytnef_project	enterprise_linux, fedora, ytnef

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.

Source: NVD

References

[NVD]https://nvd.nist.gov/vuln/detail/CVE-2021-3404
[Other]https://bugzilla.redhat.com/show_bug.cgi?id=1926965
[Exploit reference]https://github.com/Yeraze/ytnef/issues/86
[Other]https://bugzilla.redhat.com/show_bug.cgi?id=1926965
[Exploit reference]https://github.com/Yeraze/ytnef/issues/86

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