# CVE-2019-5108: Denial of service in Linux kernel > An attacker can cause denial of service in the Linux kernel by forging authentication packets to trigger improper IAPP location updates. - **Severity:** High 7.4 (`CVSS:3.0/AV:A/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H`) - **Exploited in the wild:** Not known - **Login needed:** Not needed - **Attackable:** Local or same network only - **Victim action needed:** Not needed - **Fix available:** Yes - **Published:** 23 Dec 2019 - **Updated:** 4 Aug 2024 - **Also known as:** DEBIAN-CVE-2019-5108, GHSA-m32p-568p-hpc9, RHBA-2020:3527, UBUNTU-CVE-2019-5108 ## What is CVE-2019-5108? CVE-2019-5108 is a high-severity denial of service vulnerability in Canonical Ubuntu Linux, published on 23 Dec 2019. It can only be exploited from the same machine or local network, with no action from the victim. ### Official description An exploitable denial-of-service vulnerability exists in the Linux kernel prior to mainline 5.3. An attacker could exploit this vulnerability by triggering AP to send IAPP location updates for stations before the required authentication process has completed. This could lead to different denial-of-service scenarios, either by causing CAM table attacks, or by leading to traffic flapping if faking already existing clients in other nearby APs of the same wireless infrastructure. An attacker can forge Authentication and Association Request packets to trigger this vulnerability. Weakness: CWE-287 (Improper Authentication), CWE-440 (Expected Behavior Violation) ## Which versions are affected by CVE-2019-5108? It affects 16 products. | Package | Ecosystem | Affected | Fixed in | | --- | --- | --- | --- | | `kernel-rt` | Red Hat:rhel_extras_rt:7 | All versions | 0:3.10.0-1127.19.1.rt56.1116.el7 | | `kernel-rt-debug` | Red Hat:rhel_extras_rt:7 | All versions | 0:3.10.0-1127.19.1.rt56.1116.el7 | | `kernel-rt-debug-debuginfo` | Red Hat:rhel_extras_rt:7 | All versions | 0:3.10.0-1127.19.1.rt56.1116.el7 | | `kernel-rt-debug-devel` | Red Hat:rhel_extras_rt:7 | All versions | 0:3.10.0-1127.19.1.rt56.1116.el7 | | `kernel-rt-debug-kvm` | Red Hat:rhel_extras_rt:7 | All versions | 0:3.10.0-1127.19.1.rt56.1116.el7 | | `kernel-rt-debug-kvm-debuginfo` | Red Hat:rhel_extras_rt:7 | All versions | 0:3.10.0-1127.19.1.rt56.1116.el7 | | `kernel-rt-debuginfo` | Red Hat:rhel_extras_rt:7 | All versions | 0:3.10.0-1127.19.1.rt56.1116.el7 | | `kernel-rt-debuginfo-common-x86_64` | Red Hat:rhel_extras_rt:7 | All versions | 0:3.10.0-1127.19.1.rt56.1116.el7 | | `kernel-rt-devel` | Red Hat:rhel_extras_rt:7 | All versions | 0:3.10.0-1127.19.1.rt56.1116.el7 | | `kernel-rt-doc` | Red Hat:rhel_extras_rt:7 | All versions | 0:3.10.0-1127.19.1.rt56.1116.el7 | | `kernel-rt-kvm` | Red Hat:rhel_extras_rt:7 | All versions | 0:3.10.0-1127.19.1.rt56.1116.el7 | | `kernel-rt-kvm-debuginfo` | Red Hat:rhel_extras_rt:7 | All versions | 0:3.10.0-1127.19.1.rt56.1116.el7 | | `kernel-rt-trace` | Red Hat:rhel_extras_rt:7 | All versions | 0:3.10.0-1127.19.1.rt56.1116.el7 | | `kernel-rt-trace-debuginfo` | Red Hat:rhel_extras_rt:7 | All versions | 0:3.10.0-1127.19.1.rt56.1116.el7 | | `kernel-rt-trace-devel` | Red Hat:rhel_extras_rt:7 | All versions | 0:3.10.0-1127.19.1.rt56.1116.el7 | | `kernel-rt-trace-kvm` | Red Hat:rhel_extras_rt:7 | All versions | 0:3.10.0-1127.19.1.rt56.1116.el7 | | `kernel-rt-trace-kvm-debuginfo` | Red Hat:rhel_extras_rt:7 | All versions | 0:3.10.0-1127.19.1.rt56.1116.el7 | Products: Canonical Ubuntu Linux, Debian Debian Linux, Linux kernel, Netapp 8300 Firmware, Netapp 8700 Firmware, Netapp A400 Firmware, Netapp A700s Firmware, Netapp Active Iq Unified Manager, Netapp Cloud Backup, Netapp Data Availability Services, Netapp E-Series Santricity Os Controller, Netapp H610s Firmware, Netapp Hci Management Node, Netapp Solidfire, Netapp Steelstore Cloud Integrated Storage, Oracle Sd-Wan Edge. ## How do I fix CVE-2019-5108? Upgrade to a fixed version. ## Is CVE-2019-5108 being exploited? There is no known exploitation of CVE-2019-5108 in the wild and no public exploit code. ## Other vulnerabilities in Canonical Ubuntu Linux - [CVE-2020-11651](https://insights.sbomify.com/CVE-2020-11651/): SaltStack Salt Authentication Bypass (critical 9.8, exploited in the wild) - [CVE-2020-7247](https://insights.sbomify.com/CVE-2020-7247/): OpenSMTPD Remote Code Execution (critical 9.8, exploited in the wild) - [CVE-2019-16928](https://insights.sbomify.com/CVE-2019-16928/): Exim Out-of-bounds Write (critical 9.8, exploited in the wild) - [CVE-2018-6789](https://insights.sbomify.com/CVE-2018-6789/): Exim Buffer Overflow (critical 9.8, exploited in the wild) - [CVE-2015-2590](https://insights.sbomify.com/CVE-2015-2590/): Oracle Java SE and Java SE Embedded Remote Code Execution (critical 9.8, exploited in the wild) ## Fix prompt for AI coding agents ```text Check this codebase for CVE-2019-5108 and fix it if it is affected. What it is: CVE-2019-5108 is a high-severity denial of service vulnerability in Canonical Ubuntu Linux, published on 23 Dec 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-2019-5108 in the wild and no public exploit code. Affected product: Canonical Ubuntu Linux. 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-2019-5108/ (Markdown: https://insights.sbomify.com/CVE-2019-5108/index.md) ``` ## Sources - CVE record: https://www.cve.org/CVERecord?id=CVE-2019-5108 - NVD: https://nvd.nist.gov/vuln/detail/CVE-2019-5108 - OSV: https://osv.dev/vulnerability/CVE-2019-5108 --- From sbomify Insights: https://insights.sbomify.com/CVE-2019-5108/ Summaries are generated and may contain mistakes; the official description above is the record.