# CVE-2019-11023: Null dereference in n/a > A NULL pointer dereference in the Graphviz library allows attackers to cause a denial of service via crafted input. - **Severity:** High 8.8 (`CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H`) - **Exploited in the wild:** Not known - **Login needed:** Not needed - **Attackable:** Over the internet - **Victim action needed:** A user has to click or open something - **Fix available:** Yes - **Published:** 8 Apr 2019 - **Updated:** 4 Aug 2024 - **Also known as:** DEBIAN-CVE-2019-11023, ECHO-0aba-8609-8043, GHSA-5j8x-q537-j965, MGASA-2019-0305, SUSE-SU-2019:1267-1, SUSE-SU-2019:1267-2, SUSE-SU-2019:1267-3, UBUNTU-CVE-2019-11023, openSUSE-SU-2019:1434-1, openSUSE-SU-2019:1459-1, openSUSE-SU-2020:0876-1, openSUSE-SU-2020:0906-1 ## What is CVE-2019-11023? CVE-2019-11023 is a high-severity vulnerability in n/a, published on 8 Apr 2019. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link. ### Official description The agroot() function in cgraph\obj.c in libcgraph.a in Graphviz 2.39.20160612.1140 has a NULL pointer dereference, as demonstrated by graphml2gv. Weakness: CWE-476 (NULL Pointer Dereference) ## Which versions are affected by CVE-2019-11023? It affects 1 product. | Package | Ecosystem | Affected | Fixed in | | --- | --- | --- | --- | | `graphviz-addons` | SUSE:Linux Enterprise High Availability Extension 15 | All versions | 2.40.1-6.3.2 | | `graphviz-addons` | SUSE:Linux Enterprise High Availability Extension 15 SP1 | All versions | 2.40.1-6.3.2 | | `graphviz-addons` | SUSE:Linux Enterprise High Availability Extension 15 SP2 | All versions | 2.40.1-6.3.2 | | `graphviz` | SUSE:Linux Enterprise Module for Basesystem 15 | All versions | 2.40.1-6.3.2 | | `graphviz` | SUSE:Linux Enterprise Module for Basesystem 15 SP1 | All versions | 2.40.1-6.3.2 | | `graphviz` | SUSE:Linux Enterprise Module for Basesystem 15 SP2 | All versions | 2.40.1-6.3.2 | | `graphviz-addons` | SUSE:Linux Enterprise Module for Development Tools 15 | All versions | 2.40.1-6.3.2 | | `graphviz-addons` | SUSE:Linux Enterprise Module for Development Tools 15 SP1 | All versions | 2.40.1-6.3.2 | | `graphviz-addons` | SUSE:Linux Enterprise Module for Development Tools 15 SP2 | All versions | 2.40.1-6.3.2 | | `graphviz-addons` | SUSE:Linux Enterprise Module for Package Hub 15 | All versions | 2.40.1-6.3.2 | | `graphviz-addons` | SUSE:Linux Enterprise Module for Package Hub 15 SP1 | All versions | 2.40.1-6.3.2 | | `graphviz-addons` | SUSE:Linux Enterprise Module for Package Hub 15 SP2 | All versions | 2.40.1-6.3.2 | | `graphviz-addons` | SUSE:Linux Enterprise Module for Server Applications 15 | All versions | 2.40.1-6.3.2 | | `graphviz-addons` | SUSE:Linux Enterprise Module for Server Applications 15 SP1 | All versions | 2.40.1-6.3.2 | | `graphviz-addons` | SUSE:Linux Enterprise Module for Server Applications 15 SP2 | All versions | 2.40.1-6.3.2 | | `graphviz` | openSUSE:Leap 15.0 | All versions | 2.40.1-lp150.5.3.1 | | `graphviz-addons` | openSUSE:Leap 15.0 | All versions | 2.40.1-lp150.5.3.1 | | `graphviz` | openSUSE:Leap 15.1 | All versions | 2.40.1-lp151.6.3.1 | | `graphviz-addons` | openSUSE:Leap 15.1 | All versions | 2.40.1-lp151.6.3.1 | | `graphviz` | openSUSE:Leap 15.2 | All versions | 2.40.1-lp152.7.2.1 | | `graphviz` | openSUSE:Leap 15.2 | All versions | 2.40.1-lp152.7.4.2 | | `graphviz-addons` | openSUSE:Leap 15.2 | All versions | 2.40.1-lp152.7.3.1 | | `graphviz-addons` | openSUSE:Leap 15.2 | All versions | 2.40.1-lp152.7.4.2 | Products: Graphviz Graphviz. ## How do I fix CVE-2019-11023? Apply the vendor's patch. ## Is CVE-2019-11023 being exploited? There is no known exploitation of CVE-2019-11023 in the wild and no public exploit code. ## Other vulnerabilities in n/a - [CVE-2014-1236](https://insights.sbomify.com/CVE-2014-1236/): Memory corruption in n/a (critical 10.0) - [CVE-2014-0978](https://insights.sbomify.com/CVE-2014-0978/): Memory corruption in n/a (critical 9.3) - [CVE-2008-4555](https://insights.sbomify.com/CVE-2008-4555/): Memory corruption in n/a (high 8.5) - [CVE-2023-46045](https://insights.sbomify.com/CVE-2023-46045/): Memory corruption in n/a (high 7.8) - [CVE-2014-1235](https://insights.sbomify.com/CVE-2014-1235/): Memory corruption in n/a (high 7.8) ## Fix prompt for AI coding agents ```text Check this codebase for CVE-2019-11023 and fix it if it is affected. What it is: CVE-2019-11023 is a high-severity vulnerability in n/a, published on 8 Apr 2019. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link. Exploitation: There is no known exploitation of CVE-2019-11023 in the wild and no public exploit code. Affected product: n/a. 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-2019-11023/ (Markdown: https://insights.sbomify.com/CVE-2019-11023/index.md) ``` ## Sources - CVE record: https://www.cve.org/CVERecord?id=CVE-2019-11023 - NVD: https://nvd.nist.gov/vuln/detail/CVE-2019-11023 - OSV: https://osv.dev/vulnerability/CVE-2019-11023 --- From sbomify Insights: https://insights.sbomify.com/CVE-2019-11023/ Summaries are generated and may contain mistakes; the official description above is the record.