What’s Vulnerable › Vulnerabilities
CVE-2019-3843
- Severity: high (CVSS 7.8 v3.1)
- Exploited in the wild: not listed in CISA KEV
- EPSS: 0.9% probability of exploitation in the next 30 days
- Public exploit or detection template: yes
- Published: 2019-04-26 · updated 2026-06-17
- Weakness: CWE-266
Description
It was discovered that a systemd service that uses DynamicUser property can create a SUID/SGID binary that would be allowed to run as the transient service UID/GID even after the service is terminated. A local attacker may use this flaw to access resources that will be owned by a potentially different service in the future, when the UID/GID will be recycled.
Affected products
- Canonical Ubuntu Linux: 16.04, 18.04, 19.10
- Fedoraproject Fedora: 30
- NetApp Cn1610 Firmware: all versions
- NetApp Hci Management Node: all versions
- NetApp Snapprotect: all versions
- NetApp Solidfire: all versions
- systemd: before 242 — fixed in 242
How to fix
Upgrade to a fixed version: systemd 242. Check the vendor advisory for mitigations.
References
- http://www.securityfocus.com/bid/108116
- https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-3843
- https://lists.apache.org/thread.html/r58af02e294bd07f487e2c64ffc0a29b837db5600e33b6e698b9d696b%40%3Cissues.bookkeeper.apache.org%3E
- https://lists.apache.org/thread.html/rf4c02775860db415b4955778a131c2795223f61cb8c6a450893651e4%40%3Cissues.bookkeeper.apache.org%3E
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/5JXQAKSTMABZ46EVCRMW62DHWYHTTFES/
- https://security.netapp.com/advisory/ntap-20190619-0002/
- https://usn.ubuntu.com/4269-1/
- http://www.securityfocus.com/bid/108116
- https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-3843
- https://lists.apache.org/thread.html/r58af02e294bd07f487e2c64ffc0a29b837db5600e33b6e698b9d696b%40%3Cissues.bookkeeper.apache.org%3E
- https://lists.apache.org/thread.html/rf4c02775860db415b4955778a131c2795223f61cb8c6a450893651e4%40%3Cissues.bookkeeper.apache.org%3E
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/5JXQAKSTMABZ46EVCRMW62DHWYHTTFES/
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