Attacker Value
Unknown
(0 users assessed)
Exploitability
Unknown
(0 users assessed)
User Interaction
Required
Privileges Required
None
Attack Vector
Local
0

CVE-2021-23177

Disclosure Date: August 23, 2022 •
CVE-2021-23177 CVSS v3 Base Score: 7.8
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Description

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.

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CVSS V3 Severity and Metrics
Base Score:
7.8 High
Impact Score:
5.9
Exploitability Score:
1.8
Vector:
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Attack Vector (AV):
Local
Attack Complexity (AC):
Low
Privileges Required (PR):
None
User Interaction (UI):
Required
Scope (S):
Unchanged
Confidentiality (C):
High
Integrity (I):
High
Availability (A):
High

General Information

Offensive Application
Unknown
Utility Class
Unknown
Ports
Unknown
OS
Unknown
Vulnerable Versions
libarchive Fixed in libarchive 3.5.2
Prerequisites
Unknown
Discovered By
Unknown
PoC Author
Unknown
Metasploit Module
Unknown
Reporter
Unknown

Vendors

  • debian,
  • fedoraproject,
  • libarchive,
  • redhat

Products

  • codeready linux builder -,
  • debian linux 10.0,
  • enterprise linux 8.0,
  • enterprise linux eus 8.6,
  • enterprise linux for ibm z systems 8.0,
  • enterprise linux for ibm z systems eus 8.6,
  • enterprise linux for power little endian 8.0,
  • enterprise linux for power little endian eus 8.6,
  • enterprise linux server aus 8.6,
  • enterprise linux server for power little endian update services for sap solutions 8.6,
  • enterprise linux server tus 8.6,
  • fedora 35,
  • libarchive
Technical Analysis