What is CVE-2021-3403?

CVE-2021-3403 is a high-severity vulnerability in Ytnef_project Ytnef, classified under Use After Free. CVSS score: 7.8/10. Published 2021-03-04.

How severe is CVE-2021-3403?

High severity. CVSS v3 base score is 7.8 out of 10.

Use After Free in Ytnef_project Ytnef

CVE-2021-3403

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

Vulnerability class: Use-After-Free

EPSS: 0.018 (74.9th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.8 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.

Affected products

Ytnef_project Ytnef — versions 1.9.3
Fedoraproject Fedora — versions 33
Redhat Enterprise_linux — versions 7.0
N/a Ytnef — versions All versions

Weakness classification (CWE)

References

secalert@redhat.com (Third Party Advisory, x_refsource_MISC, Issue Tracking)
secalert@redhat.com (Exploit, Third Party Advisory, x_refsource_MISC, Issue Tracking)

Frequently asked questions

What is CVE-2021-3403?: CVE-2021-3403 is a high-severity vulnerability in Ytnef_project Ytnef, classified under Use After Free. CVSS score: 7.8/10. Published 2021-03-04.
How severe is CVE-2021-3403?: High severity. CVSS v3 base score is 7.8 out of 10.