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CRITICAL · 9.1

CVE-2021-33643

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.

Vulnerability 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.

CVSS Score

9.1

CRITICAL

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
NONE
Availability
HIGH

Affected Products

VendorProductVersions
FeepLibtar< 1.2.21
OpenatomOpeneuler20.03
FedoraprojectFedora35

Related Weaknesses (CWE)

CWE-125

References

FAQ

What is CVE-2021-33643?

CVE-2021-33643 is a vulnerability with a CVSS score of 9.1 (CRITICAL). 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 severe is CVE-2021-33643?

CVE-2021-33643 has been rated CRITICAL with a CVSS base score of 9.1/10. This is considered a critical vulnerability requiring immediate attention.

Is there a patch for CVE-2021-33643?

Check the references section above for vendor advisories and patch information. Affected products include: Feep Libtar, Openatom Openeuler, Fedoraproject Fedora.