# CVE-2018-10196: Null dereference in n/a > Remote attackers can cause a denial of service via a crafted file due to a null pointer dereference in the Graphviz dotgen library. - **Severity:** Medium 5.5 (`CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/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:** A user has to click or open something - **Fix available:** Yes - **Published:** 30 May 2018 - **Updated:** 5 Aug 2024 - **Also known as:** DEBIAN-CVE-2018-10196, GHSA-9jm3-9x6p-8q48, MGASA-2018-0307, SUSE-SU-2020:14524-1, SUSE-SU-2020:2346-1, SUSE-SU-2020:3090-1, UBUNTU-CVE-2018-10196, openSUSE-SU-2020:1294-1, openSUSE-SU-2020:1303-1 ## What is CVE-2018-10196? CVE-2018-10196 is a medium-severity vulnerability in Canonical Ubuntu Linux, published on 30 May 2018. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link. ### Official description NULL pointer dereference vulnerability in the rebuild_vlists function in lib/dotgen/conc.c in the dotgen library in Graphviz 2.40.1 allows remote attackers to cause a denial of service (application crash) via a crafted file. Weakness: CWE-476 (NULL Pointer Dereference) ## Which versions are affected by CVE-2018-10196? It affects 3 products. | Package | Ecosystem | Affected | Fixed in | | --- | --- | --- | --- | | `graphviz-plugins` | SUSE:Linux Enterprise High Availability Extension 11 SP4 | All versions | 2.20.2-8.3.6 | | `graphviz-plugins` | SUSE:Linux Enterprise High Availability Extension 12 SP3 | All versions | 2.28.0-29.3.17 | | `graphviz-plugins` | SUSE:Linux Enterprise High Availability Extension 12 SP4 | All versions | 2.28.0-29.3.17 | | `graphviz-plugins` | SUSE:Linux Enterprise High Availability Extension 12 SP5 | All versions | 2.28.0-29.3.17 | | `graphviz-addons` | SUSE:Linux Enterprise High Availability Extension 15 | All versions | 2.40.1-6.6.8 | | `graphviz-addons` | SUSE:Linux Enterprise High Availability Extension 15 SP1 | All versions | 2.40.1-6.6.8 | | `graphviz` | SUSE:Linux Enterprise Module for Basesystem 15 SP1 | All versions | 2.40.1-6.6.4 | | `graphviz-addons` | SUSE:Linux Enterprise Module for Development Tools 15 SP1 | All versions | 2.40.1-6.6.8 | | `graphviz-addons` | SUSE:Linux Enterprise Module for Server Applications 15 SP1 | All versions | 2.40.1-6.6.8 | | `graphviz` | SUSE:Linux Enterprise Server 12 SP5 | All versions | 2.28.0-29.3.8 | | `graphviz-plugins` | SUSE:Linux Enterprise Server 12 SP5 | All versions | 2.28.0-29.3.17 | | `graphviz` | SUSE:Linux Enterprise Server for SAP Applications 12 SP5 | All versions | 2.28.0-29.3.8 | | `graphviz-plugins` | SUSE:Linux Enterprise Server for SAP Applications 12 SP5 | All versions | 2.28.0-29.3.17 | | `graphviz` | SUSE:Linux Enterprise Software Development Kit 12 SP5 | All versions | 2.28.0-29.3.8 | | `graphviz` | openSUSE:Leap 15.1 | All versions | 2.40.1-lp151.6.6.1 | | `graphviz-addons` | openSUSE:Leap 15.1 | All versions | 2.40.1-lp151.6.6.1 | | `graphviz` | openSUSE:Leap 15.2 | All versions | 2.40.1-lp152.7.7.1 | | `graphviz-addons` | openSUSE:Leap 15.2 | All versions | 2.40.1-lp152.7.7.1 | Products: Canonical Ubuntu Linux, Fedoraproject Fedora, Graphviz Graphviz. ## How do I fix CVE-2018-10196? Apply the vendor's patch. ## Is CVE-2018-10196 being exploited? There is no known exploitation of CVE-2018-10196 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-2018-10196 and fix it if it is affected. What it is: CVE-2018-10196 is a medium-severity vulnerability in Canonical Ubuntu Linux, published on 30 May 2018. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link. Exploitation: There is no known exploitation of CVE-2018-10196 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-2018-10196/ (Markdown: https://insights.sbomify.com/CVE-2018-10196/index.md) ``` ## Sources - CVE record: https://www.cve.org/CVERecord?id=CVE-2018-10196 - NVD: https://nvd.nist.gov/vuln/detail/CVE-2018-10196 - OSV: https://osv.dev/vulnerability/CVE-2018-10196 --- From sbomify Insights: https://insights.sbomify.com/CVE-2018-10196/ Summaries are generated and may contain mistakes; the official description above is the record.