Vulnerability in [Freedesktop.org] Systemd
CVE-2019-3844
It was discovered that a systemd service that uses DynamicUser property can get new privileges through the execution of SUID binaries, which would allow to create binaries owned by the service transient group with the setgid bit set. A local attacker may use this flaw to access resources that will be owned by a potentially different service in the future, when the GID will be recycled.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.8 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.009 (59.4th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 59th percentile — 59.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.009 · newest: 0.009 · change: 0.000
Affected products
- [Freedesktop.org] Systemd — versions 242
- NetApp Cn1610
- NetApp Cn1610 Firmware
- NetApp Hci Management Node
- NetApp Snapprotect
- NetApp Solidfire
- Systemd Project
- Canonical Ubuntu Linux — versions 16.04, 18.04, 19.10
Weakness classification (CWE)
Public proof-of-concept exploits
References
- bugzilla.redhat.com/show_bug.cgi (Patch, Third Party Advisory, Issue Tracking)
- www.securityfocus.com/bid/108096 (VDB Entry, Third Party Advisory, vdb-entry)
- security.netapp.com/advisory/ntap-20190619-0002/ (Third Party Advisory)
- usn.ubuntu.com/4269-1/ (vendor-advisory, Third Party Advisory)
- lists.apache.org/thread.html/rf4c02775860db415b4955778a131c2795223f61cb8c6a4508… (mailing-list)
- lists.apache.org/thread.html/r58af02e294bd07f487e2c64ffc0a29b837db5600e33b6e698… (mailing-list)
Frequently asked questions
- What is CVE-2019-3844?
- CVE-2019-3844 is a high-severity vulnerability in [Freedesktop.org] Systemd, classified under Privilege Chaining. CVSS score: 7.8/10. Published 2019-04-26.
- How severe is CVE-2019-3844?
- High severity. CVSS v3 base score is 7.8 out of 10.
- Is CVE-2019-3844 known to be exploited?
- 5 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.