# CVE-2019-15718: Privilege escalation in n/a > An unprivileged user can exploit a systemd-resolved flaw to execute restricted D-Bus methods and modify system DNS resolver settings. - **Severity:** Medium 4.4 (`CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N`) - **Exploited in the wild:** Not known - **Login needed:** Any signed-in user - **Attackable:** Local or same network only - **Victim action needed:** Not needed - **Fix available:** Yes - **Published:** 4 Sep 2019 - **Updated:** 5 Aug 2024 - **Also known as:** DEBIAN-CVE-2019-15718, GHSA-p39j-chr3-gjhq, MGASA-2019-0330, RHSA-2019:3592, UBUNTU-CVE-2019-15718, USN-4120-1 ## What is CVE-2019-15718? CVE-2019-15718 is a medium-severity vulnerability in Fedoraproject Fedora, published on 4 Sep 2019. It can only be exploited from the same machine or local network, with no action from the victim. ### Official description In systemd 240, bus_open_system_watch_bind_with_description in shared/bus-util.c (as used by systemd-resolved to connect to the system D-Bus instance), calls sd_bus_set_trusted, which disables access controls for incoming D-Bus messages. An unprivileged user can exploit this by executing D-Bus methods that should be restricted to privileged users, in order to change the system's DNS resolver settings. ## Which versions are affected by CVE-2019-15718? It affects 14 products. | Package | Ecosystem | Affected | Fixed in | | --- | --- | --- | --- | | `systemd` | Red Hat:enterprise_linux:8::baseos | All versions | 0:239-18.el8 | | `systemd-container` | Red Hat:enterprise_linux:8::baseos | All versions | 0:239-18.el8 | | `systemd-container-debuginfo` | Red Hat:enterprise_linux:8::baseos | All versions | 0:239-18.el8 | | `systemd-debuginfo` | Red Hat:enterprise_linux:8::baseos | All versions | 0:239-18.el8 | | `systemd-debugsource` | Red Hat:enterprise_linux:8::baseos | All versions | 0:239-18.el8 | | `systemd-devel` | Red Hat:enterprise_linux:8::baseos | All versions | 0:239-18.el8 | | `systemd-journal-remote` | Red Hat:enterprise_linux:8::baseos | All versions | 0:239-18.el8 | | `systemd-journal-remote-debuginfo` | Red Hat:enterprise_linux:8::baseos | All versions | 0:239-18.el8 | | `systemd-libs` | Red Hat:enterprise_linux:8::baseos | All versions | 0:239-18.el8 | | `systemd-libs-debuginfo` | Red Hat:enterprise_linux:8::baseos | All versions | 0:239-18.el8 | | `systemd-pam` | Red Hat:enterprise_linux:8::baseos | All versions | 0:239-18.el8 | | `systemd-pam-debuginfo` | Red Hat:enterprise_linux:8::baseos | All versions | 0:239-18.el8 | | `systemd-tests` | Red Hat:enterprise_linux:8::baseos | All versions | 0:239-18.el8 | | `systemd-tests-debuginfo` | Red Hat:enterprise_linux:8::baseos | All versions | 0:239-18.el8 | | `systemd-udev` | Red Hat:enterprise_linux:8::baseos | All versions | 0:239-18.el8 | | `systemd-udev-debuginfo` | Red Hat:enterprise_linux:8::baseos | All versions | 0:239-18.el8 | Products: Fedoraproject Fedora, Redhat Enterprise Linux, Redhat Enterprise Linux Eus, Redhat Enterprise Linux for Ibm Z Systems 8 S390x, Redhat Enterprise Linux for Ibm Z Systems Eus, Redhat Enterprise Linux for Ibm Z Systems Eus S390x, Redhat Enterprise Linux for Power Little Endian, Redhat Enterprise Linux for Power Little Endian Eus, Redhat Enterprise Linux Server Aus, Redhat Enterprise Linux Server for Power Little Endian Update Services for Sap Solutions, Redhat Enterprise Linux Server Tus, Redhat Enterprise Linux Server Update Services for Sap Solutions, Redhat Openshift Container Platform, Systemd Project Systemd. ## How do I fix CVE-2019-15718? Apply the vendor's patch. ## Is CVE-2019-15718 being exploited? There is no known exploitation of CVE-2019-15718 in the wild and no public exploit code. ## Other vulnerabilities in Fedoraproject Fedora - [CVE-2024-4577](https://insights.sbomify.com/CVE-2024-4577/): PHP-CGI OS Command Injection (critical 9.8, exploited in the wild) - [CVE-2021-39226](https://insights.sbomify.com/CVE-2021-39226/): Grafana Authentication Bypass (critical 9.8, exploited in the wild) - [CVE-2019-5544](https://insights.sbomify.com/CVE-2019-5544/): VMware ESXi and Horizon DaaS OpenSLP Heap-Based Buffer Overflow (critical 9.8, exploited in the wild) - [CVE-2024-4947](https://insights.sbomify.com/CVE-2024-4947/): Google Chromium V8 Type Confusion (critical 9.6, exploited in the wild) - [CVE-2024-4671](https://insights.sbomify.com/CVE-2024-4671/): Google Chromium Visuals Use-After-Free (critical 9.6, exploited in the wild) ## Fix prompt for AI coding agents ```text Check this codebase for CVE-2019-15718 and fix it if it is affected. What it is: CVE-2019-15718 is a medium-severity vulnerability in Fedoraproject Fedora, published on 4 Sep 2019. It can only be exploited from the same machine or local network, with no action from the victim. Exploitation: There is no known exploitation of CVE-2019-15718 in the wild and no public exploit code. Affected product: Fedoraproject Fedora. No package-level version data is available, so check the vendor advisory linked from the reference page. Task: 1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies. 2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it. 3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead. 4. Run the tests and summarise what changed and why. 5. If nothing in the project is affected, say so and change nothing. Reference: https://insights.sbomify.com/CVE-2019-15718/ (Markdown: https://insights.sbomify.com/CVE-2019-15718/index.md) ``` ## Sources - CVE record: https://www.cve.org/CVERecord?id=CVE-2019-15718 - NVD: https://nvd.nist.gov/vuln/detail/CVE-2019-15718 - OSV: https://osv.dev/vulnerability/CVE-2019-15718 --- From sbomify Insights: https://insights.sbomify.com/CVE-2019-15718/ Summaries are generated and may contain mistakes; the official description above is the record.