CVE-2021-3404

moderate-risk

Published 2021-03-04

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.

Do I need to act?

2.1% chance of exploitation in next 30 days

EPSS score — moderate exploit probability

Not on CISA KEV list

No confirmed active exploitation reported to CISA

Patch status unknown

Check vendor advisories for fix availability and mitigation guidance

CVSS 7.8/10 High

LOCAL / LOW complexity

Affected Products (3)

Ytnef

Enterprise Linux

Fedora

Affected Vendors

Redhat Fedoraproject Ytnef Project

References (4)

Issue Tracking https://bugzilla.redhat.com/show_bug.cgi?id=1926965

Exploit https://github.com/Yeraze/ytnef/issues/86

Issue Tracking https://bugzilla.redhat.com/show_bug.cgi?id=1926965

Exploit https://github.com/Yeraze/ytnef/issues/86

/ 100

moderate-risk

Severity 24/34 · High

Exploitability 5/34 · Minimal

Exposure 9/34 · Low