CVE-2021-20193

A flaw was found in the src/list.c of tar 1.33 and earlier. This flaw allows an attacker who can submit a crafted input file to tar to cause uncontrolled consumption of memory. The highest threat from this vulnerability is to system availability.

CVSS v3 3.3 LOW
CVSS v2.0 4.3 MEDIUM

3.3^/10

CVSS v3 : LOW

Vector :

Exploitability : 1.8 / Impact : 1.4

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required NONE

User Interaction REQUIRED

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact LOW

Scope UNCHANGED

4.3^/10

CVSS v2.0 : MEDIUM

Vector : AV:N/AC:M/Au:N/C:N/I:N/A:P

Exploitability : 8.6 / Impact : 2.9

Access Vector NETWORK

Access Complexity MEDIUM

Authentication NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact PARTIAL

References

Link	Resource
https://bugzilla.redhat.com/show_bug.cgi?id=1917565	Issue Tracking Patch Third Party Advisory
https://git.savannah.gnu.org/cgit/tar.git/commit/?id=d9d4435692150fa8ff68e1b1a473d187cc3fd777	Mailing List Patch Third Party Advisory
https://savannah.gnu.org/bugs/?59897	Issue Tracking Patch Vendor Advisory
https://security.gentoo.org/glsa/202105-29	Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=1917565	Issue Tracking Patch Third Party Advisory
https://git.savannah.gnu.org/cgit/tar.git/commit/?id=d9d4435692150fa8ff68e1b1a473d187cc3fd777	Mailing List Patch Third Party Advisory
https://savannah.gnu.org/bugs/?59897	Issue Tracking Patch Vendor Advisory
https://security.gentoo.org/glsa/202105-29	Third Party Advisory
https://cert-portal.siemens.com/productcert/html/ssa-398330.html

Configurations

Configuration 1 (hide)

cpe:2.3:a:gnu:tar:*:*:*:*:*:*:*:*

History

14 Oct 2026, 11:16

Type	Values Removed	Values Added
References		() https://cert-portal.siemens.com/productcert/html/ssa-398330.html -

Information

Published : 2021-03-26 17:15

Updated : 2026-10-14 11:16

NVD link : CVE-2021-20193

Mitre link : CVE-2021-20193

CVE.ORG link : CVE-2021-20193

JSON object : View

Products Affected

gnu

tar

CWE

CWE-401

Missing Release of Memory after Effective Lifetime

CWE-125

Out-of-bounds Read

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