CVE-2021-3403
7.8
HIGH
CVSS 3.1
EPSS 1.0%
Description
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.
How to fix CVE-2021-3403
To remediate CVE-2021-3403, upgrade the affected package to a fixed version below.
- Debian/libytnef—upgrade to 1.9.3-3 or later
Is CVE-2021-3403 being exploited?
Low — EPSS is 1.0%, meaning exploitation activity has not been observed at scale.
Affected packages (1)
- from 0, < 1.9.3-3
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | HIGH7.8 | CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H |