CVE-2021-33643
libtar - security update
9.1
CRITICAL
CVSS 3.1
EPSS 0.22%
Description
An attacker who submits a crafted tar file with size in header struct being 0 may be able to trigger an calling of malloc(0) for a variable gnu_longlink, causing an out-of-bounds read.
How to fix CVE-2021-33643
To remediate CVE-2021-33643, upgrade the affected package to a fixed version below.
- Debian/libtar—upgrade to 1.2.20-8+deb12u1~deb11u1 or later
- —upgrade to 1.2.20-8+deb12u1~deb11u1 or later
Is CVE-2021-33643 being exploited?
Low — EPSS is 0.2%, meaning exploitation activity has not been observed at scale.
Affected packages (2)
- from 0, < 1.2.20-8+deb12u1~deb11u1
- from 0, < 1.2.20-8+deb12u1~deb11u1
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | CRITICAL9.1 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H |