CVE-2021-33645

libtar: memory leak found in th_read() function

Severity Score

7.5

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

The th_read() function doesn’t free a variable t->th_buf.gnu_longlink after allocating memory, which may cause a memory leak.

La función th_read() no libera una variable t-)th_buf.gnu_longlink después de asignar memoria, lo que puede causar una pérdida de memoria

A flaw was found in libtar. This security vulnerability occurs because the th_read() function in libtar doesn’t free a variable t->th_buf.gnu_longlink after allocating memory, which may cause a memory leak.

*Credits: N/A

CVSS Scores

NISTv3.1 7.5

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

None

Availability

High

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2021-05-28 CVE Reserved
2022-08-09 CVE Published
2024-03-30 EPSS Updated
2024-08-03 CVE Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CWE-401: Missing Release of Memory after Effective Lifetime

CAPEC

References (8)

URL	Tag	Source
https://www.openeuler.org/en/security/safety-bulletin/detail.html?id=openEuler-SA-2022-1807	Third Party Advisory

URL	Date	SRC

URL	Date	SRC

URL	Date	SRC
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/4S4PJRCJLEAWN2EKXGLSOBTL7O57V7NC	2023-11-07
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/5YSHZY753R7XW6CIKJVAWI373WW3YRRJ	2023-11-07
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/7Q26QDNOJDOFYWMJWEIK5XR62M2FF6IJ	2023-11-07
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/7WX5YE66CT7Y5C2HTHXSFDKQWYWYWJ2T	2023-11-07
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/OD4HEBSTI22FNYKOKK7W3X6ZQE6FV3XC	2023-11-07
https://access.redhat.com/security/cve/CVE-2021-33645	2023-05-16
https://bugzilla.redhat.com/show_bug.cgi?id=2121295	2023-05-16

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Feep Search vendor "Feep"		Libtar Search vendor "Feep" for product "Libtar"				< 1.2.21 Search vendor "Feep" for product "Libtar" and version " < 1.2.21"		-		Affected
Huawei Search vendor "Huawei"		Openeuler Search vendor "Huawei" for product "Openeuler"				20.03 Search vendor "Huawei" for product "Openeuler" and version "20.03"		sp1, lts		Affected
Huawei Search vendor "Huawei"		Openeuler Search vendor "Huawei" for product "Openeuler"				20.03 Search vendor "Huawei" for product "Openeuler" and version "20.03"		sp3, lts		Affected
Huawei Search vendor "Huawei"		Openeuler Search vendor "Huawei" for product "Openeuler"				22.03 Search vendor "Huawei" for product "Openeuler" and version "22.03"		lts		Affected
Fedoraproject Search vendor "Fedoraproject"		Fedora Search vendor "Fedoraproject" for product "Fedora"				35 Search vendor "Fedoraproject" for product "Fedora" and version "35"		-		Affected
Fedoraproject Search vendor "Fedoraproject"		Fedora Search vendor "Fedoraproject" for product "Fedora"				36 Search vendor "Fedoraproject" for product "Fedora" and version "36"		-		Affected
Fedoraproject Search vendor "Fedoraproject"		Fedora Search vendor "Fedoraproject" for product "Fedora"				37 Search vendor "Fedoraproject" for product "Fedora" and version "37"		-		Affected