CVE-2019-3843
First published: Fri Mar 01 2019(Updated: )
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.
Credit: secalert@redhat.com secalert@redhat.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Systemd Project Systemd | <242 | |
| Fedoraproject Fedora | =30 | |
| Canonical Ubuntu Linux | =16.04 | |
| Canonical Ubuntu Linux | =18.04 | |
| Canonical Ubuntu Linux | =19.10 | |
| Netapp Hci Management Node | ||
| Netapp Snapprotect | ||
| Netapp Solidfire | ||
| Netapp Cn1610 Firmware | ||
| Netapp Cn1610 | ||
| All of | ||
| Netapp Cn1610 Firmware | ||
| Netapp Cn1610 | ||
| redhat/systemd | <242 | 242 |
| debian/systemd | 247.3-7+deb11u5 247.3-7+deb11u6 252.30-1~deb12u2 256.6-1 256.7-1 |
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Reference Links
- http://www.securityfocus.com/bid/108116
- https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-3843
- https://lists.apache.org/thread.html/r58af02e294bd07f487e2c64ffc0a29b837db5600e33b6e698b9d696b@%3Cissues.bookkeeper.apache.org%3E
- https://lists.apache.org/thread.html/rf4c02775860db415b4955778a131c2795223f61cb8c6a450893651e4@%3Cissues.bookkeeper.apache.org%3E
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/5JXQAKSTMABZ46EVCRMW62DHWYHTTFES/
- https://security.netapp.com/advisory/ntap-20190619-0002/
- https://usn.ubuntu.com/4269-1/
- https://launchpad.net/bugs/cve/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://github.com/systemd/systemd/commit/3c27973b13724ede05a06a5d346a569794cda433
- https://github.com/systemd/systemd/commit/f69567cbe26d09eac9d387c0be0fc32c65a83ada
- https://github.com/systemd/systemd/commit/9d880b70ba5c6ca83c82952f4c90e86e56c7b70c
- https://github.com/systemd/systemd/commit/7445db6eb70e8d5989f481d0c5a08ace7047ae5b
- https://github.com/systemd/systemd/commit/62aa29247c3d74bcec0607c347f2be23cd90675d
- https://github.com/systemd/systemd/commit/bf65b7e0c9fc215897b676ab9a7c9d1c688143ba
- https://bugs.chromium.org/p/project-zero/issues/detail?id=1771
- https://bugs.launchpad.net/ubuntu/+source/systemd/+bug/1814596
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=1703356
- https://github.com/systemd/systemd-stable/pull/54
- https://access.redhat.com/errata/RHSA-2020:1794
- https://access.redhat.com/security/cve/cve-2019-3843
- https://bugzilla.redhat.com/show_bug.cgi?id=1684607
- https://security-tracker.debian.org/tracker/CVE-2019-3843
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-3843
- https://nvd.nist.gov/vuln/detail/CVE-2019-3843
- https://ubuntu.com/security/CVE-2019-3843
Frequently Asked Questions
What is the vulnerability ID for this vulnerability?
The vulnerability ID is CVE-2019-3843.
What is the severity of CVE-2019-3843?
The severity of CVE-2019-3843 is high with a severity value of 7.8.
Which software is affected by CVE-2019-3843?
The affected software includes Systemd, Fedora, Canonical Ubuntu Linux, Netapp HCI Management Node, Netapp Snapprotect, Netapp Solidfire, and Netapp Cn1610 Firmware.
How can a local attacker exploit CVE-2019-3843?
A local attacker may exploit CVE-2019-3843 by using a systemd service with DynamicUser property to create a SUID/SGID binary and access resources owned by a potentially different user.
Where can I find more information about CVE-2019-3843?
You can find more information about CVE-2019-3843 on the SecurityFocus website and the Bugzilla Red Hat website.
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