A swtpm security update has been released for Arch Linux.

ASA-202011-21: swtpm: privilege escalation

Arch Linux Security Advisory ASA-202011-21
=========================================
Severity: Medium
Date : 2020-11-19
CVE-ID : CVE-2020-28407
Package : swtpm
Type : privilege escalation
Remote : No
Link :   https://security.archlinux.org/AVG-1282

Summary
======
The package swtpm before version 0.5.1-1 is vulnerable to privilege
escalation.

Resolution
=========
Upgrade to 0.5.1-1.

# pacman -Syu "swtpm>=0.5.1-1"

The problem has been fixed upstream in version 0.5.1.

Workaround
=========
None.

Description
==========
A potential symbolic link following issue has been found in swtpm
before 0.5.1.

Impact
=====
A malicious file might trick the program to overwrite files and
escalate priviledges.

References
=========
  https://github.com/stefanberger/swtpm/compare/v0.5.0...v0.5.1
  https://github.com/stefanberger/swtpm/commit/e9c9778d5c35ef077aed1ec6601b47ac478f8185
  https://github.com/stefanberger/swtpm/commit/4cc42c0ba3632a98ef381bda68d0a4eaec4578db
  https://github.com/stefanberger/swtpm/commit/634b6294000fb785b9f12e13b852c18a0888b01e
  https://github.com/stefanberger/swtpm/commit/a03cbadd087b2602412823f254ac75a9a12d97e3
  https://github.com/stefanberger/swtpm/commit/526300236dc8a7664acdc265b6fc5d767289ac39
  https://github.com/stefanberger/swtpm/commit/e621b21d4c31029ebe794350fcff2bcd4b0f13a0
  https://security.archlinux.org/CVE-2020-28407