CVE-2021-33640

State: Published
Severity: 6.2 Medium
Published: Dec 19, 2022
Updated: Apr 17, 2025
Reserved: May 28, 2021

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).

Scores

CVSS	Score	Vector	Source
3.1	6.2 Medium	CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H	openEuler

Weaknesses

CWE-416 Use After Free

Affected Products

Product	Versions
openEuler 22.03 LTSopenEuler	libtar 1.2.20-21Affected
openEuler 20.03 LTS SP1openEuler	libtar 1.2.20-19Affected
openEuler 20.03 LTS SP3openEuler	libtar 1.2.20-19Affected

References

https://www.openeuler.org/en/security/cve/detail/?cveId=CVE-2021-33640&packageName=libtar
FEDORA-2022-88772d0a2dvendor-advisory
FEDORA-2022-ccc68b06ccvendor-advisory

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