ASA-202107-57 log generated external raw
[ASA-202107-57] systemd: denial of service |
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Arch Linux Security Advisory ASA-202107-57
==========================================
Severity: Medium
Date : 2021-07-21
CVE-ID : CVE-2021-33910
Package : systemd
Type : denial of service
Remote : No
Link : https://security.archlinux.org/AVG-2179
Summary
=======
The package systemd before version 249.1-1 is vulnerable to denial of
service.
Resolution
==========
Upgrade to 249.1-1.
# pacman -Syu "systemd>=249.1-1"
The problem has been fixed upstream in version 249.1.
Workaround
==========
None.
Description
===========
A denial of service security issue has been found in systemd before
version 249.1. A local attacker who is able to mount a filesystem with
a very long path can crash systemd and the whole system through an
attacker-controlled alloca().
Impact
======
A local unprivileged attacker who is able to mount a filesystem with a
very long path can crash systemd and therefore the whole system.
References
==========
https://www.qualys.com/2021/07/20/cve-2021-33910/denial-of-service-systemd.txt
https://www.qualys.com/2021/07/20/cve-2021-33910/cve-2021-33910-crasher.c
https://bugzilla.redhat.com/show_bug.cgi?id=1970887
https://github.com/systemd/systemd/pull/20256
https://github.com/systemd/systemd/commit/441e0115646d54f080e5c3bb0ba477c892861ab9
https://github.com/systemd/systemd-stable/commit/764b74113e36ac5219a4b82a05f311b5a92136ce
https://security.archlinux.org/CVE-2021-33910
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