Vulnerability Intelligence Report
CVE-2021-23177
An improper link resolution flaw while extracting an archive can lead to changing the access control list (ACL) of the target of the link. 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 change the ACL of a file on the system and gain more privileges.
No Active Exploit Signals
CVSS Base Score
7.8
HIGH
EPSS Probability:0.37%
Executive Threat Verdict
Evaluating...
Evaluating Threat Landscape...
Assessing known weaponization, exploitation telemetry, and federal advisories.
Attack Surface
—
Authentication
—
Weaponization
—
SSVC Action
—
Weaknesses (CWE)
CWE-59 ↗CWE-59 - Improper Link Resolution Before File Access ('Link Following')
Affected Products & Versions
| Vendor | Product | Affected Versions |
|---|---|---|
| libarchive | libarchive | all |
| fedoraproject | fedora | 35 |
| redhat | enterprise_linux | 8.0 |
| redhat | enterprise_linux_eus | 8.6 |
| redhat | enterprise_linux_for_ibm_z_systems | 8.0 |
| redhat | enterprise_linux_for_ibm_z_systems_eus | 8.6 |
| redhat | enterprise_linux_for_power_little_endian | 8.0 |
| redhat | enterprise_linux_for_power_little_endian_eus | 8.6 |
| redhat | enterprise_linux_server_aus | 8.6 |
| redhat | enterprise_linux_server_for_power_little_endian_update_services_for_sap_solutions | 8.6 |
| redhat | enterprise_linux_server_tus | 8.6 |
| redhat | codeready_linux_builder | all |
| debian | debian_linux | 10.0 |
References & Technical Advisories
No reference links found.
Threat Intelligence Signals
EPSS Score
0.367%
GitHub Advisory
Identity & Timeline
| Status | PUBLISHED |
| Assigning Authority | Red Hat, Inc. · Vendor · USA |
| Reserved | 2021-12-16T00:00:00 |
| Published | 2022-08-23T00:00:00 |
| Last Updated | 2024-08-03T19:05:55 |
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