CVE-2021-23177
libarchive: extracting a symlink with ACLs modifies ACLs of target
Severity Score
7.8
*CVSS v3.1
Exploit Likelihood
*EPSS
Affected Versions
*CPE
Public Exploits
0
*Multiple Sources
Exploited in Wild
-
*KEV
Decision
-
*SSVC
Descriptions
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.
Un fallo de resolución de enlaces inapropiado mientras es extraído un archivo puede conllevar a un cambio de la lista de control de acceso (ACL) del objetivo del enlace. Un atacante puede proporcionar un archivo malicioso a un usuario víctima, que desencadenaría este fallo cuando intentara extraer el archivo. Un atacante local puede usar este fallo para cambiar la ACL de un archivo en el sistema y conseguir más privilegios.
*Credits:
N/A
CVSS Scores
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality
Integrity
Availability
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality
Integrity
Availability
* Common Vulnerability Scoring System
SSVC
- Decision:-
Exploitation
Automatable
Tech. Impact
* Organization's Worst-case Scenario
Timeline
- 2021-12-16 CVE Reserved
- 2022-02-17 CVE Published
- 2024-02-03 EPSS Updated
- 2024-08-03 CVE Updated
- ---------- Exploited in Wild
- ---------- KEV Due Date
- ---------- First Exploit
CWE
- CWE-59: Improper Link Resolution Before File Access ('Link Following')
CAPEC
References (5)
| URL | Tag | Source |
|---|---|---|
| https://lists.debian.org/debian-lts-announce/2022/11/msg00030.html | Mailing List |
|
| URL | Date | SRC |
|---|
| URL | Date | SRC |
|---|---|---|
| https://bugzilla.redhat.com/show_bug.cgi?id=2024245 | 2022-03-15 | |
| https://github.com/libarchive/libarchive/commit/fba4f123cc456d2b2538f811bb831483bf336bad | 2022-12-03 | |
| https://github.com/libarchive/libarchive/issues/1565 | 2022-12-03 |
| URL | Date | SRC |
|---|---|---|
| https://access.redhat.com/security/cve/CVE-2021-23177 | 2022-03-15 |
Affected Vendors, Products, and Versions
| Vendor | Product | Version | Other | Status | ||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Vendor | Product | Version | Other | Status | <-- --> | Vendor | Product | Version | Other | Status |
| Redhat Search vendor "Redhat" | Codeready Linux Builder Search vendor "Redhat" for product "Codeready Linux Builder" | - | - |
Affected
| in | Redhat Search vendor "Redhat" | Enterprise Linux Search vendor "Redhat" for product "Enterprise Linux" | 8.0 Search vendor "Redhat" for product "Enterprise Linux" and version "8.0" | - |
Safe
|
| Redhat Search vendor "Redhat" | Codeready Linux Builder Search vendor "Redhat" for product "Codeready Linux Builder" | - | - |
Affected
| in | Redhat Search vendor "Redhat" | Enterprise Linux Eus Search vendor "Redhat" for product "Enterprise Linux Eus" | 8.6 Search vendor "Redhat" for product "Enterprise Linux Eus" and version "8.6" | - |
Safe
|
| Redhat Search vendor "Redhat" | Codeready Linux Builder Search vendor "Redhat" for product "Codeready Linux Builder" | - | - |
Affected
| in | Redhat Search vendor "Redhat" | Enterprise Linux For Ibm Z Systems Search vendor "Redhat" for product "Enterprise Linux For Ibm Z Systems" | 8.0 Search vendor "Redhat" for product "Enterprise Linux For Ibm Z Systems" and version "8.0" | - |
Safe
|
| Redhat Search vendor "Redhat" | Codeready Linux Builder Search vendor "Redhat" for product "Codeready Linux Builder" | - | - |
Affected
| in | Redhat Search vendor "Redhat" | Enterprise Linux For Ibm Z Systems Eus Search vendor "Redhat" for product "Enterprise Linux For Ibm Z Systems Eus" | 8.6 Search vendor "Redhat" for product "Enterprise Linux For Ibm Z Systems Eus" and version "8.6" | - |
Safe
|
| Redhat Search vendor "Redhat" | Codeready Linux Builder Search vendor "Redhat" for product "Codeready Linux Builder" | - | - |
Affected
| in | Redhat Search vendor "Redhat" | Enterprise Linux For Power Little Endian Search vendor "Redhat" for product "Enterprise Linux For Power Little Endian" | 8.0 Search vendor "Redhat" for product "Enterprise Linux For Power Little Endian" and version "8.0" | - |
Safe
|
| Redhat Search vendor "Redhat" | Codeready Linux Builder Search vendor "Redhat" for product "Codeready Linux Builder" | - | - |
Affected
| in | Redhat Search vendor "Redhat" | Enterprise Linux For Power Little Endian Eus Search vendor "Redhat" for product "Enterprise Linux For Power Little Endian Eus" | 8.6 Search vendor "Redhat" for product "Enterprise Linux For Power Little Endian Eus" and version "8.6" | - |
Safe
|
| Libarchive Search vendor "Libarchive" | Libarchive Search vendor "Libarchive" for product "Libarchive" | < 3.5.2 Search vendor "Libarchive" for product "Libarchive" and version " < 3.5.2" | - |
Affected
| ||||||
| Fedoraproject Search vendor "Fedoraproject" | Fedora Search vendor "Fedoraproject" for product "Fedora" | 35 Search vendor "Fedoraproject" for product "Fedora" and version "35" | - |
Affected
| ||||||
| Redhat Search vendor "Redhat" | Enterprise Linux Search vendor "Redhat" for product "Enterprise Linux" | 8.0 Search vendor "Redhat" for product "Enterprise Linux" and version "8.0" | - |
Affected
| ||||||
| Redhat Search vendor "Redhat" | Enterprise Linux Eus Search vendor "Redhat" for product "Enterprise Linux Eus" | 8.6 Search vendor "Redhat" for product "Enterprise Linux Eus" and version "8.6" | - |
Affected
| ||||||
| Redhat Search vendor "Redhat" | Enterprise Linux For Ibm Z Systems Search vendor "Redhat" for product "Enterprise Linux For Ibm Z Systems" | 8.0 Search vendor "Redhat" for product "Enterprise Linux For Ibm Z Systems" and version "8.0" | - |
Affected
| ||||||
| Redhat Search vendor "Redhat" | Enterprise Linux For Ibm Z Systems Eus Search vendor "Redhat" for product "Enterprise Linux For Ibm Z Systems Eus" | 8.6 Search vendor "Redhat" for product "Enterprise Linux For Ibm Z Systems Eus" and version "8.6" | - |
Affected
| ||||||
| Redhat Search vendor "Redhat" | Enterprise Linux For Power Little Endian Search vendor "Redhat" for product "Enterprise Linux For Power Little Endian" | 8.0 Search vendor "Redhat" for product "Enterprise Linux For Power Little Endian" and version "8.0" | - |
Affected
| ||||||
| Redhat Search vendor "Redhat" | Enterprise Linux For Power Little Endian Eus Search vendor "Redhat" for product "Enterprise Linux For Power Little Endian Eus" | 8.6 Search vendor "Redhat" for product "Enterprise Linux For Power Little Endian Eus" and version "8.6" | - |
Affected
| ||||||
| Redhat Search vendor "Redhat" | Enterprise Linux Server Aus Search vendor "Redhat" for product "Enterprise Linux Server Aus" | 8.6 Search vendor "Redhat" for product "Enterprise Linux Server Aus" and version "8.6" | - |
Affected
| ||||||
| Redhat Search vendor "Redhat" | Enterprise Linux Server For Power Little Endian Update Services For Sap Solutions Search vendor "Redhat" for product "Enterprise Linux Server For Power Little Endian Update Services For Sap Solutions" | 8.6 Search vendor "Redhat" for product "Enterprise Linux Server For Power Little Endian Update Services For Sap Solutions" and version "8.6" | - |
Affected
| ||||||
| Redhat Search vendor "Redhat" | Enterprise Linux Server Tus Search vendor "Redhat" for product "Enterprise Linux Server Tus" | 8.6 Search vendor "Redhat" for product "Enterprise Linux Server Tus" and version "8.6" | - |
Affected
| ||||||
| Debian Search vendor "Debian" | Debian Linux Search vendor "Debian" for product "Debian Linux" | 10.0 Search vendor "Debian" for product "Debian Linux" and version "10.0" | - |
Affected
| ||||||