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CVE-2021-33640

nvd nist
Published: Dec 19, 2022Modified: Apr 2, 2025

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9.8
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Exploitability: 3.9 / Impact: 5.9
Source: NVD

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).

Affected (5)

Openatom
1 product
Openeuler
Fedoraproject
1 product
Fedora
Configuration A
3 vulnerable
Vulnerable SoftwareAffected Versions
Openatom
Openeuler
Version 20.03 sp1
Openeuler
Version 20.03 sp2
Openeuler
Version 22.03
Configuration B
2 vulnerable
Vulnerable SoftwareAffected Versions
Fedoraproject
Fedora
Version 36
Fedora
Version 37

Related CWEs

CWE-416
Use After Free
The product reuses or references memory after it has been freed. At some point afterward, the memory may be allocated again and saved in another pointer, while the original pointer references a location somewhere within the new allocation. Any operations using the original pointer are no longer valid because the memory "belongs" to the code that operates on the new pointer.

References (6)

Source: securities@openeuler.org
Source: securities@openeuler.org
Source: securities@openeuler.org
Vendor Advisory
Source: af854a3a-2127-422b-91ae-364da2661108
Source: af854a3a-2127-422b-91ae-364da2661108
Source: af854a3a-2127-422b-91ae-364da2661108
Vendor Advisory

Timeline

No history available yet.