CVE-2020-24332

trousers: tss user can be used to create or corrupt existing files, this could lead to DoS

Severity Score

5.5

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

An issue was discovered in TrouSerS through 0.3.14. If the tcsd daemon is started with root privileges, the creation of the system.data file is prone to symlink attacks. The tss user can be used to create or corrupt existing files, which could possibly lead to a DoS attack.

Se detectó un problema en TrouSerS versiones hasta 0.3.14. Si el demonio tcsd es iniciado con privilegios root, la creación del archivo system.data es propensa a ataques de tipo symlink. El usuario tss puede ser usado para crear o corromper archivos existentes, lo que posiblemente podría conllevar a un ataque de DoS

*Credits: N/A

Attack Vector

Local

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

None

Availability

High

Attack Vector

Local

Attack Complexity

Low

Authentication

None

Confidentiality

None

Integrity

None

Availability

Complete

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2020-08-13 CVE Reserved
2020-08-13 CVE Published
2023-03-08 EPSS Updated
2024-08-04 CVE Updated
2024-08-04 First Exploit
---------- Exploited in Wild
---------- KEV Due Date

CWE

CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
CWE-59: Improper Link Resolution Before File Access ('Link Following')

CAPEC

References (7)

URL	Tag	Source

URL	Date	SRC
http://www.openwall.com/lists/oss-security/2020/08/14/1	2024-08-04
https://bugzilla.suse.com/show_bug.cgi?id=1164472	2024-08-04
https://sourceforge.net/p/trousers/mailman/message/37015817	2024-08-04

URL	Date	SRC
https://seclists.org/oss-sec/2020/q2/att-135/tcsd_fixes.patch	2023-11-07

URL	Date	SRC
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/SSDL7COIFCZQMUBNAASNMKMX7W5JUHRD	2023-11-07
https://access.redhat.com/security/cve/CVE-2020-24332	2021-05-18
https://bugzilla.redhat.com/show_bug.cgi?id=1870052	2021-05-18

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Trustedcomputinggroup Search vendor "Trustedcomputinggroup"		Trousers Search vendor "Trustedcomputinggroup" for product "Trousers"				<= 0.3.14 Search vendor "Trustedcomputinggroup" for product "Trousers" and version " <= 0.3.14"		-		Affected
Fedoraproject Search vendor "Fedoraproject"		Fedora Search vendor "Fedoraproject" for product "Fedora"				33 Search vendor "Fedoraproject" for product "Fedora" and version "33"		-		Affected