What’s Vulnerable › Vulnerabilities

CVE-2019-11328

• Severity: high (CVSS 8.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 2.1% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2019-05-14 · updated 2026-06-17
• Weakness: CWE-732

Description

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.

Affected products

• Fedoraproject Fedora: 28, 29, 30
• openSUSE Backports: sle-15, sle-15-sp1
• openSUSE Leap: 15.1
• sylabs singularity: from 3.1.0 before 3.2.0; 3.2.0, 3.2.0-rc1, 3.2.0-rc2 — fixed in 3.2.0

How to fix

Upgrade to a fixed version: sylabs singularity 3.2.0. Check the vendor advisory for mitigations.

References

• http://lists.opensuse.org/opensuse-security-announce/2019-10/msg00028.html
• http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00059.html
• http://www.openwall.com/lists/oss-security/2019/05/16/1
• http://www.securityfocus.com/bid/108360
• https://github.com/sylabs/singularity/releases/tag/v3.2.0
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/5O3TPL5OOTIZEI4H6IQBCCISBARJ6WL3/
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/LIHV7DSEVTB5SUPEZ2UXGS3Q6WMEQSO2/
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/LNU5BUHFOTYUZVHFUSX2VG4S3RCPUEMA/
• http://lists.opensuse.org/opensuse-security-announce/2019-10/msg00028.html
• http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00059.html
• http://www.openwall.com/lists/oss-security/2019/05/16/1
• http://www.securityfocus.com/bid/108360

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