CVE-2019-11328

moderate-risk

Published 2019-05-14

An issue was discovered in Singularity 3.1.0 to 3.2.0-rc2, a malicious user with local/network access to the host system (e.g. ssh) could exploit this vulnerability due to insecure permissions allowing a user to edit files within `/run/singularity/instances/sing/<user>/<instance>`. The manipulation of those files can change the behavior of the starter-suid program when instances are joined resulting in potential privilege escalation on the host.

Do I need to act?

0.82% chance of exploitation

EPSS score — low exploit probability

Not on CISA KEV list

No confirmed active exploitation reported to CISA

Patch status unknown

Check vendor advisories for fix availability and mitigation guidance

CVSS 8.8/10 High

NETWORK / LOW complexity

Affected Products (10)

Singularity

Fedora

Backports

Leap

Affected Vendors

Fedoraproject Opensuse Sylabs

References (16)

Third Party Advisory http://lists.opensuse.org/opensuse-security-announce/2019-10/msg00028.html

Third Party Advisory http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00059.html

Exploit http://www.openwall.com/lists/oss-security/2019/05/16/1

Broken Link http://www.securityfocus.com/bid/108360

Release Notes https://github.com/sylabs/singularity/releases/tag/v3.2.0

https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedorapro...

Third Party Advisory http://lists.opensuse.org/opensuse-security-announce/2019-10/msg00028.html

Third Party Advisory http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00059.html

Exploit http://www.openwall.com/lists/oss-security/2019/05/16/1

Broken Link http://www.securityfocus.com/bid/108360

Release Notes https://github.com/sylabs/singularity/releases/tag/v3.2.0

https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedorapro...

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moderate-risk

Severity 30/34 · Critical

Exploitability 3/34 · Minimal

Exposure 16/34 · Moderate