# CVE-2021-3500: Memory corruption in djvulibre > A stack overflow in the DjVu library allows attackers to cause a crash or potentially execute code via crafted files. - **Severity:** High 7.8 (`CVSS:3.1/AV:L/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:** Local or same network only - **Victim action needed:** A user has to click or open something - **Fix available:** Yes - **Published:** 24 Jun 2021 - **Updated:** 3 Aug 2024 - **Also known as:** CLEANSTART-2023-UD90988, DEBIAN-CVE-2021-3500, GHSA-5h3c-qqwc-xg6r, SUSE-SU-2021:14738-1, SUSE-SU-2021:1813-1, SUSE-SU-2021:1857-1, SUSE-SU-2021:1948-1, UBUNTU-CVE-2021-3500, openSUSE-SU-2021:0877-1, openSUSE-SU-2021:1948-1 ## What is CVE-2021-3500? CVE-2021-3500 is a high-severity memory corruption vulnerability in Debian Debian Linux, published on 24 Jun 2021. 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 A flaw was found in djvulibre-3.5.28 and earlier. A Stack overflow in function DJVU::DjVuDocument::get_djvu_file() via crafted djvu file may lead to application crash and other consequences. Weakness: CWE-787 (Out-of-bounds Write) ## Which versions are affected by CVE-2021-3500? It affects 2 products. | Package | Ecosystem | Affected | Fixed in | | --- | --- | --- | --- | | `djvulibre` | SUSE:Enterprise Storage 6 | All versions | 3.5.27-3.14.1 | | `djvulibre` | SUSE:HPE Helion OpenStack 8 | All versions | 3.5.25.3-5.12.1 | | `djvulibre` | SUSE:Linux Enterprise High Performance Computing 15 SP1-ESPOS | All versions | 3.5.27-3.14.1 | | `djvulibre` | SUSE:Linux Enterprise High Performance Computing 15 SP1-LTSS | All versions | 3.5.27-3.14.1 | | `djvulibre` | SUSE:Linux Enterprise High Performance Computing 15-ESPOS | All versions | 3.5.27-3.14.1 | | `djvulibre` | SUSE:Linux Enterprise High Performance Computing 15-LTSS | All versions | 3.5.27-3.14.1 | | `djvulibre` | SUSE:Linux Enterprise Module for Desktop Applications 15 SP2 | All versions | 3.5.27-11.6.1 | | `djvulibre` | SUSE:Linux Enterprise Module for Desktop Applications 15 SP3 | All versions | 3.5.27-11.6.1 | | `djvulibre` | SUSE:Linux Enterprise Module for Package Hub 15 SP2 | All versions | 3.5.27-11.6.1 | | `djvulibre` | SUSE:Linux Enterprise Module for Package Hub 15 SP3 | All versions | 3.5.27-11.6.1 | | `djvulibre` | SUSE:Linux Enterprise Point of Sale 11 SP3 | All versions | 3.5.21-3.12.1 | | `djvulibre` | SUSE:Linux Enterprise Server 11 SP4-LTSS | All versions | 3.5.21-3.12.1 | | `djvulibre` | SUSE:Linux Enterprise Server 12 SP2-BCL | All versions | 3.5.25.3-5.12.1 | | `djvulibre` | SUSE:Linux Enterprise Server 12 SP3-BCL | All versions | 3.5.25.3-5.12.1 | | `djvulibre` | SUSE:Linux Enterprise Server 12 SP3-LTSS | All versions | 3.5.25.3-5.12.1 | | `djvulibre` | SUSE:Linux Enterprise Server 12 SP4-LTSS | All versions | 3.5.25.3-5.12.1 | | `djvulibre` | SUSE:Linux Enterprise Server 12 SP5 | All versions | 3.5.25.3-5.12.1 | | `djvulibre` | SUSE:Linux Enterprise Server 15 SP1-BCL | All versions | 3.5.27-3.14.1 | | `djvulibre` | SUSE:Linux Enterprise Server 15 SP1-LTSS | All versions | 3.5.27-3.14.1 | | `djvulibre` | SUSE:Linux Enterprise Server 15-LTSS | All versions | 3.5.27-3.14.1 | | `djvulibre` | SUSE:Linux Enterprise Server for SAP Applications 12 SP3 | All versions | 3.5.25.3-5.12.1 | | `djvulibre` | SUSE:Linux Enterprise Server for SAP Applications 12 SP4 | All versions | 3.5.25.3-5.12.1 | | `djvulibre` | SUSE:Linux Enterprise Server for SAP Applications 12 SP5 | All versions | 3.5.25.3-5.12.1 | | `djvulibre` | SUSE:Linux Enterprise Server for SAP Applications 15 | All versions | 3.5.27-3.14.1 | | `djvulibre` | SUSE:Linux Enterprise Server for SAP Applications 15 SP1 | All versions | 3.5.27-3.14.1 | | `djvulibre` | SUSE:Linux Enterprise Software Development Kit 12 SP5 | All versions | 3.5.25.3-5.12.1 | | `djvulibre` | SUSE:Manager Proxy 4.0 | All versions | 3.5.27-3.14.1 | | `djvulibre` | SUSE:Manager Retail Branch Server 4.0 | All versions | 3.5.27-3.14.1 | | `djvulibre` | SUSE:Manager Server 4.0 | All versions | 3.5.27-3.14.1 | | `djvulibre` | SUSE:OpenStack Cloud 8 | All versions | 3.5.25.3-5.12.1 | | `djvulibre` | SUSE:OpenStack Cloud 9 | All versions | 3.5.25.3-5.12.1 | | `djvulibre` | SUSE:OpenStack Cloud Crowbar 8 | All versions | 3.5.25.3-5.12.1 | | `djvulibre` | SUSE:OpenStack Cloud Crowbar 9 | All versions | 3.5.25.3-5.12.1 | | `djvulibre` | openSUSE:Leap 15.2 | All versions | 3.5.27-lp152.7.6.1 | | `djvulibre` | openSUSE:Leap 15.3 | All versions | 3.5.27-11.6.1 | Products: Debian Debian Linux, Djvulibre Project Djvulibre. ## How do I fix CVE-2021-3500? Upgrade to a fixed version. ## Is CVE-2021-3500 being exploited? There is no known exploitation of CVE-2021-3500 in the wild and no public exploit code. ## Other vulnerabilities in Debian Debian Linux - [CVE-2015-3306](https://insights.sbomify.com/CVE-2015-3306/): ProFTPD Improper Access Control (critical 10.0, exploited in the wild) - [CVE-2025-49113](https://insights.sbomify.com/CVE-2025-49113/): RoundCube Webmail Deserialization of Untrusted Data (critical 9.9, exploited in the wild) - [CVE-2026-24061](https://insights.sbomify.com/CVE-2026-24061/): GNU InetUtils Argument Injection (critical 9.8, exploited in the wild) - [CVE-2025-39682](https://insights.sbomify.com/CVE-2025-39682/): Linux Kernel Improper Check for Unusual or Exceptional Conditions (critical 9.8, exploited in the wild) - [CVE-2024-9680](https://insights.sbomify.com/CVE-2024-9680/): Mozilla Firefox Use-After-Free (critical 9.8, exploited in the wild) ## Fix prompt for AI coding agents ```text Check this codebase for CVE-2021-3500 and fix it if it is affected. What it is: CVE-2021-3500 is a high-severity memory corruption vulnerability in Debian Debian Linux, published on 24 Jun 2021. 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-2021-3500 in the wild and no public exploit code. Affected product: Debian Debian 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-2021-3500/ (Markdown: https://insights.sbomify.com/CVE-2021-3500/index.md) ``` ## Sources - CVE record: https://www.cve.org/CVERecord?id=CVE-2021-3500 - NVD: https://nvd.nist.gov/vuln/detail/CVE-2021-3500 - OSV: https://osv.dev/vulnerability/CVE-2021-3500 --- From sbomify Insights: https://insights.sbomify.com/CVE-2021-3500/ Summaries are generated and may contain mistakes; the official description above is the record.