Security update for singularity SUSE Patch security@suse.de SUSE Security Team openSUSE-SU-2020:1770-1 Final 1 1 2020-10-29T17:24:21Z current 2020-10-29T17:24:21Z 2020-10-29T17:24:21Z cve-database/bin/generate-cvrf.pl 2017-02-24T01:00:00Z Security update for singularity This update for singularity fixes the following issues: Update to new version 3.6.4: - CVE-2020-15229: Due to insecure handling of path traversal and the lack of path sanitization within unsquashfs, it is possible to overwrite/create files on the host filesystem during the extraction of a crafted squashfs filesystem (boo#1177901). The CVRF data is provided by SUSE under the Creative Commons License 4.0 with Attribution (CC-BY-4.0). openSUSE-2020-1770 Copyright SUSE LLC under the Creative Commons License 4.0 with Attribution (CC-BY-4.0) https://lists.opensuse.org/opensuse-updates/2020-10/msg00192.html E-Mail link for openSUSE-SU-2020:1770-1 https://www.suse.com/support/security/rating/ SUSE Security Ratings https://bugzilla.suse.com/1177901 SUSE Bug 1177901 https://www.suse.com/security/cve/CVE-2020-15229/ SUSE CVE CVE-2020-15229 page openSUSE Leap 15.2 singularity-3.6.4-lp152.2.9.1 singularity-3.6.4-lp152.2.9.1 as a component of openSUSE Leap 15.2 Singularity (an open source container platform) from version 3.1.1 through 3.6.3 has a vulnerability. Due to insecure handling of path traversal and the lack of path sanitization within `unsquashfs`, it is possible to overwrite/create any files on the host filesystem during the extraction with a crafted squashfs filesystem. The extraction occurs automatically for unprivileged (either installation or with `allow setuid = no`) run of Singularity when a user attempt to run an image which is a local SIF image or a single file containing a squashfs filesystem and is coming from remote sources `library://` or `shub://`. Image build is also impacted in a more serious way as it can be used by a root user, allowing an attacker to overwrite/create files leading to a system compromise, so far bootstrap methods `library`, `shub` and `localimage` are triggering the squashfs extraction. This issue is addressed in Singularity 3.6.4. All users are advised to upgrade to 3.6.4 especially if they use Singularity mainly for building image as root user. There is no solid workaround except to temporary avoid to use unprivileged mode with single file images in favor of sandbox images instead. Regarding image build, temporary avoid to build from `library` and `shub` sources and as much as possible use `--fakeroot` or a VM for that. CVE-2020-15229 openSUSE Leap 15.2:singularity-3.6.4-lp152.2.9.1 critical To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch". https://lists.opensuse.org/opensuse-updates/2020-10/msg00192.html https://www.suse.com/security/cve/CVE-2020-15229.html CVE-2020-15229 https://bugzilla.suse.com/1177901 SUSE Bug 1177901