CVE-2021-20193

LowCVSS 3.3/10Last modified Oct 14, 2026

Description

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.

Metrics

CVSS 3.1 3.3/10CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L

Weakness enumeration

CWE-401 CWE-125

Affected software

Vendor	Product	Versions
n/a	tar	1.33 and earlier
Siemens	SIMATIC S7-1500 CPU 1518-4 PN/DP MFP	>= V3.1.0, < V3.1.5
Siemens	SIMATIC S7-1500 CPU 1518-4 PN/DP MFP	>= V3.1.0, < V3.1.5
Siemens	SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP	>= V3.1.0, < V3.1.5
Siemens	SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP	>= V3.1.0, < V3.1.5
Siemens	SIPLUS S7-1500 CPU 1518-4 PN/DP MFP	>= V3.1.0, < V3.1.5

References

https://bugzilla.redhat.com/show_bug.cgi?id=1917565Issue Tracking, Patch, Third Party Advisory
https://git.savannah.gnu.org/cgit/tar.git/commit/?id=d9d4435692150fa8ff68e1b1a473d187cc3fd777Mailing List, Patch, Third Party Advisory
https://savannah.gnu.org/bugs/?59897Issue Tracking, Patch, Vendor Advisory
https://security.gentoo.org/glsa/202105-29Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=1917565Issue Tracking, Patch, Third Party Advisory
https://git.savannah.gnu.org/cgit/tar.git/commit/?id=d9d4435692150fa8ff68e1b1a473d187cc3fd777Mailing List, Patch, Third Party Advisory
https://savannah.gnu.org/bugs/?59897Issue Tracking, Patch, Vendor Advisory
https://security.gentoo.org/glsa/202105-29Third Party Advisory
https://cert-portal.siemens.com/productcert/html/ssa-398330.html

Timeline

Published: Mar 26, 2021
Last modified: Oct 14, 2026
NVD status: Modified

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