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CVE-2021-33640

Published: Dec 19, 2022Updated: Apr 2, 2025 Sources: CVE List NVDCWE-416
6.2MEDIUM
NVD MITRE
EPSS Score
0.6%
Top 52.4%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available
Self-Check
OpenVAS

Description

After tar_close(), libtar.c releases the memory pointed to by pointer t. After tar_close() is called in the list() function, it continues to use pointer t: free_longlink_longname(t->th_buf) . As a result, the released memory is used (use-after-free).

No summary for this CVE yet.

CVSS Vector Breakdown

AV:LAC:LPR:NUI:NS:UC:NI:NA:H
Exploitability
AV:LAttack Vector
Local
AC:LAttack Complexity
Low
PR:NPrivileges Required
None
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:NConfidentiality
None
I:NIntegrity
None
A:HAvailability
High
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Weaknesses

CWE-416

Affected Products

openEuler
oss-project·CN
openEuler 22.03 LTSOn-prem
Operating Systems / linux-distro
openEuler 20.03 LTS SP1On-prem
Operating Systems / linux-distro
openEuler 20.03 LTS SP3On-prem
Operating Systems / linux-distro
openatom
oss-project·CNaka openharmony, openeuler
openeulerOn-premOS
Operating Systems / linux-distro
fedoraproject
oss-project·USaka fedora project
fedoraOn-premOS
Operating Systems / linux-distro

Exploitability

Official Patch Available
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Attack Graph

Products CVE Techniques Tactics

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MITRE ATT&CK

2 techniques
Initial Access
Privilege Escalation
View detailed technique mapping

References

https://www.openeuler.org/en/security/cve/detail/?cveId=CVE-2021-33640&packageName=libtar
openeuler.org
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/4S4PJRCJLEAWN2EKXGLSOBTL7O57V7NC/
lists.fedoraproject.org
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/7WX5YE66CT7Y5C2HTHXSFDKQWYWYWJ2T/
lists.fedoraproject.org

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