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CVE-2020-24331

25
FAUCET Score

CVE-2020-24331 describes a privilege escalation vulnerability in TrouSerS versions up to 0.3.14, affecting Fedora and TrouSerS Project distributions. If the tcsd daemon runs as root, a local attacker with tss user privileges can modify the /etc/tcsd.conf file, potentially leading to high impact on confidentiality, integrity, and availability. This vulnerability has a CVSS score of 7.8 (High), indicating a significant risk. There is currently no public exploit code available (Metasploit, Nuclei, ExploitDB), and it is not listed in the KEV catalog, suggesting no active exploitation. Community discussion and media coverage for this CVE are minimal.

Impacted Technologies

VendorProductVersion(s)CPE
<= 0.3.14CPE matchmatch criteria
cpe:2.3:a:trousers_project:trousers:*:*:*:*:*:*:*:*
33CPE matchmatch criteria
cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

7.8HIGH

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
1.8
Impact Score
5.9
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.49%
Probability of exploitation in next 30 days
EPSS Percentile
39.1%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0049 is in the 79th percentile among its peer group of 17,061 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.2 Bluesky, 0.1 Mastodon, and 0.2 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (6)

microsoftpatch availablevia msrc
Product: 19173-16820Fixed in: 0.3.14-6
microsoftpatch availablevia msrc
Product: 19174-16823Fixed in: 0.3.14-7
microsoftpatch availablevia msrc
Product: cm1 trousers 0.3.14-6 on CBL Mariner 1.0Fixed in: 0.3.14-6
microsoftpatch availablevia msrc
Product: cbl2 trousers 0.3.14-7 on CBL Mariner 2.0Fixed in: 0.3.14-7
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 8Fixed in: trousers-0:0.3.15-1.el8
View patch
redhatend of lifevia redhat_api
Product: Red Hat Enterprise Linux 7Fixed in: trousers

Vendor Advisories (2)

redhatCVE-2020-24331Moderate

trousers: tss user still has read and write access to the /etc/tcsd.conf file if tcsd is started as root

Aug 13, 2020
microsoft2020-Aug/CVE-2020-24331Important

An issue was discovered in TrouSerS through 0.3.14. If the tcsd daemon is started with root privileges the tss user still has read and write access to the /etc/tcsd.conf file (which contains various settings related to this daemon).

Aug 11, 2020

References

bugzilla.suse.com / show_bug.cgi
ExploitIssue TrackingThird Party Advisory
lists.fedoraproject.org / archives/list/package-announce%40lists.fedoraproject.org/message/SSDL7COIFCZQMUBNAASNMKMX7W5JUHRD
seclists.org / oss-sec/2020/q2/att-135/tcsd_fixes.patch
Mailing ListPatchThird Party Advisory
sourceforge.net / p/trousers/mailman/message/37015817
ExploitMailing ListThird Party Advisory
openwall.com / lists/oss-security/2020/08/14/1
ExploitMailing ListThird Party Advisory