security advisory

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netblue30 2021-02-08 08:59:48 -05:00
parent deae31301f
commit b7cf89ecf2

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@ -83,6 +83,32 @@ Backup Video Channel: https://www.bitchute.com/profile/JSBsA1aoQVfW/
We take security bugs very seriously. If you believe you have found one, please report it by emailing us at netblue30@protonmail.com
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Security Adivsory - Feb 8, 2021
Summary: A vulnerability resulting in root privilege escalation was discovered in Firejail's OverlayFS code,
Versions affected: Firejail software versions starting with 0.9.30. Long Term Support (LTS) Firejail branch is not affected by this bug.
Workaround: Disable overlayfs feature at runtime. In a text editor open /etc/firejail/firejail.config file, and set "overlayfs" entry to "no".
$ grep overlayfs /etc/firejail/firejail.config
# Enable or disable overlayfs features, default enabled.
overlayfs no
Fix: The bug is fixed in Firejail version 0.9.64.4
GitHub commit: (file configure.ac)
https://github.com/netblue30/firejail/commit/97d8a03cad19501f017587cc4e47d8418273834b
Credit: Security researcher Roman Fiedler analyzed the code and discovered the vulnerability.
Functional PoC exploit code was provided to Firejail development team.
A description of the problem is here on Roman's blog:
https://unparalleled.eu/publications/2021/advisory-unpar-2021-0.txt
https://unparalleled.eu/blog/2021/20210208-rigged-race-against-firejail-for-local-root/
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## Installing
Try installing Firejail from your system packages first. Firejail is included in Alpine, ALT Linux, Arch, Chakra, Debian, Deepin, Devuan, Fedora, Gentoo, Manjaro, Mint, NixOS, Parabola, Parrot, PCLinuxOS, ROSA, Solus, Slackware/SlackBuilds, Trisquel, Ubuntu, Void and possibly others.