Description
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).
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | trousers | 0.3.15-0.1 | — |
| Debian 13 | trousers | 0.3.15-0.1 | — |
| Debian 12 | trousers | 0.3.15-0.1 | — |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 20.04 LTS | trousers | No fix yet | — |
| Ubuntu 18.04 LTS | trousers | No fix yet | — |
| Ubuntu 16.04 LTS | trousers | No fix yet | — |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 8 | trousers +2 | 0.3.15-1.el8 | RHSA-2021:1627 |
AlmaLinux
Errata ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| AlmaLinux 8 | trousers +2 | 0.3.15-1.el8 | ALSA-2021:1627 |
Rocky Linux
Errata ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Rocky Linux 8 | trousers | 0.3.15-1.el8 | RLSA-2021:1627 |
Azure Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Azure Linux 2 (CBL-Mariner) | trousers | 0.3.14-7 | — |
Oracle Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Oracle Linux 8 | trousers +2 | 0.3.15-1.el8 | ELSA-2021-1627 |
Advisories 4
- ALSA-2021:1627 Moderate: trousers security, bug fix, and enhancement update AlmaLinux Security Advisories · Oct 29, 2026
- RHSA-2021:1627 Red Hat Security Advisory: trousers security, bug fix, and enhancement update Red Hat Security Advisories (RHSA) · Jun 27, 2026
- RLSA-2021:1627 Moderate: trousers security, bug fix, and enhancement update Rocky Linux Security Advisories · Feb 4, 2026
- ELSA-2021-1627 Moderate: trousers security, bug fix, and enhancement update (Oracle Linux 8) Oracle Linux Security Advisories (ELSA) · May 25, 2021
References
- https://sourceforge.net/p/trousers/mailman/message/37015817/
- https://bugzilla.suse.com/show_bug.cgi?id=1164472
- https://seclists.org/oss-sec/2020/q2/att-135/tcsd_fixes.patch
- [oss-security] 20200814 Re: [TrouSerS-tech] Multiple Security Issues in the TrouSerS tpm1.2 tscd Daemon mailing-list
- FEDORA-2020-ab3dace708 vendor-advisory