CVE-2021-31566

An improper link resolution flaw can occur while extracting an archive leading to changing modes, times, access control lists, and flags of a file outside of the archive. An attacker may provide a malicious archive to a victim user, who would trigger this flaw when trying to extract the archive. A local attacker may use this flaw to gain more privileges in a system.

CVSS v3.0 7.8 HIGH

7.8^/10

CVSS v3.0 : HIGH

V3 Legend

Vector :

Exploitability : 1.8 / Impact : 5.9

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required NONE

User Interaction REQUIRED

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://github.com/libarchive/libarchive/commit/b41daecb5ccb4c8e3b2c53fd6147109fc12c3043	Patch Third Party Advisory
https://access.redhat.com/security/cve/CVE-2021-31566	Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=2024237	Issue Tracking Patch Third Party Advisory
https://github.com/libarchive/libarchive/issues/1566	Issue Tracking Patch Third Party Advisory
https://lists.debian.org/debian-lts-announce/2022/11/msg00030.html	Mailing List Third Party Advisory

Configurations

Configuration 1 (hide)

cpe:2.3:a:libarchive:libarchive:*:*:*:*:*:*:*:*

Configuration 2 (hide)

cpe:2.3:o:fedoraproject:fedora:35:*:*:*:*:*:*:*

Configuration 3 (hide)

OR	cpe:2.3:o:redhat:enterprise_linux:8.0:::::::*
	cpe:2.3:o:redhat:enterprise_linux_for_power_little_endian:8.0:::::::*
	cpe:2.3:o:redhat:enterprise_linux_for_ibm_z_systems:8.0:::::::*
	cpe:2.3:o:redhat:enterprise_linux_server_for_power_little_endian_update_services_for_sap_solutions:8.6:::::::*
	cpe:2.3:o:redhat:enterprise_linux_for_ibm_z_systems_eus:8.6:::::::*
	cpe:2.3:o:redhat:enterprise_linux_server_aus:8.6:::::::*
	cpe:2.3:o:redhat:enterprise_linux_server_tus:8.6:::::::*
	cpe:2.3:o:redhat:enterprise_linux_eus:8.6:::::::*
	cpe:2.3:o:redhat:enterprise_linux_for_power_little_endian_eus:8.6:::::::*

Configuration 4 (hide)

AND

cpe:2.3:a:redhat:codeready_linux_builder:-:*:*:*:*:*:*:*

OR	cpe:2.3:o:redhat:enterprise_linux:8.0:::::::*
	cpe:2.3:o:redhat:enterprise_linux_for_power_little_endian:8.0:::::::*
	cpe:2.3:o:redhat:enterprise_linux_for_ibm_z_systems:8.0:::::::*
	cpe:2.3:o:redhat:enterprise_linux_for_ibm_z_systems_eus:8.6:::::::*
	cpe:2.3:o:redhat:enterprise_linux_eus:8.6:::::::*
	cpe:2.3:o:redhat:enterprise_linux_for_power_little_endian_eus:8.6:::::::*

Configuration 5 (hide)

cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*

Information

Published : 2022-08-23 09:15

Updated : 2022-12-03 06:16

NVD link : CVE-2021-31566

Mitre link : CVE-2021-31566

JSON object : View

CWE

CWE-59

Improper Link Resolution Before File Access ('Link Following')

Products Affected

redhat

enterprise_linux_for_power_little_endian
enterprise_linux
enterprise_linux_server_aus
enterprise_linux_for_ibm_z_systems
codeready_linux_builder
enterprise_linux_for_ibm_z_systems_eus
enterprise_linux_server_tus
enterprise_linux_for_power_little_endian_eus
enterprise_linux_server_for_power_little_endian_update_services_for_sap_solutions
enterprise_linux_eus

fedoraproject

fedora

debian

debian_linux

libarchive

libarchive

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An attacker may provide a malicious archive to a victim user, who would trigger this flaw when trying to extract the archive. A local attacker may use this flaw to gain more privileges in a system."}]}, "problemtype": {"problemtype_data": [{"description": [{"lang": "en", "value": "CWE-59"}]}]}, "data_version": "4.0", "CVE_data_meta": {"ID": "CVE-2021-31566", "ASSIGNER": "secalert@redhat.com"}}, "impact": {"baseMetricV3": {"cvssV3": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 7.8, "attackVector": "LOCAL", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H", "integrityImpact": "HIGH", "userInteraction": "REQUIRED", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "NONE", "confidentialityImpact": "HIGH"}, "impactScore": 5.9, "exploitabilityScore": 1.8}}, "publishedDate": "2022-08-23T16:15Z", "configurations": {"nodes": [{"children": [], "operator": "OR", "cpe_match": [{"cpe23Uri": "cpe:2.3:a:libarchive:libarchive:*:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": true, "versionEndExcluding": "3.5.2"}]}, {"children": [], "operator": "OR", "cpe_match": [{"cpe23Uri": "cpe:2.3:o:fedoraproject:fedora:35:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": true}]}, {"children": [], "operator": "OR", "cpe_match": [{"cpe23Uri": "cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": true}, {"cpe23Uri": "cpe:2.3:o:redhat:enterprise_linux_for_power_little_endian:8.0:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": true}, {"cpe23Uri": "cpe:2.3:o:redhat:enterprise_linux_for_ibm_z_systems:8.0:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": true}, {"cpe23Uri": "cpe:2.3:o:redhat:enterprise_linux_server_for_power_little_endian_update_services_for_sap_solutions:8.6:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": true}, {"cpe23Uri": "cpe:2.3:o:redhat:enterprise_linux_for_ibm_z_systems_eus:8.6:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": true}, {"cpe23Uri": "cpe:2.3:o:redhat:enterprise_linux_server_aus:8.6:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": true}, {"cpe23Uri": "cpe:2.3:o:redhat:enterprise_linux_server_tus:8.6:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": true}, {"cpe23Uri": "cpe:2.3:o:redhat:enterprise_linux_eus:8.6:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": true}, {"cpe23Uri": "cpe:2.3:o:redhat:enterprise_linux_for_power_little_endian_eus:8.6:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": true}]}, {"children": [{"children": [], "operator": "OR", "cpe_match": [{"cpe23Uri": "cpe:2.3:a:redhat:codeready_linux_builder:-:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": true}]}, {"children": [], "operator": "OR", "cpe_match": [{"cpe23Uri": "cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": false}, {"cpe23Uri": "cpe:2.3:o:redhat:enterprise_linux_for_power_little_endian:8.0:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": false}, {"cpe23Uri": "cpe:2.3:o:redhat:enterprise_linux_for_ibm_z_systems:8.0:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": false}, {"cpe23Uri": "cpe:2.3:o:redhat:enterprise_linux_for_ibm_z_systems_eus:8.6:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": false}, {"cpe23Uri": "cpe:2.3:o:redhat:enterprise_linux_eus:8.6:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": false}, {"cpe23Uri": "cpe:2.3:o:redhat:enterprise_linux_for_power_little_endian_eus:8.6:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": false}]}], "operator": "AND", "cpe_match": []}, {"children": [], "operator": "OR", "cpe_match": [{"cpe23Uri": "cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": true}]}], "CVE_data_version": "4.0"}, "lastModifiedDate": "2022-12-03T14:16Z"}

7.8 /10