# CVE-2020-2655: Information disclosure in Java > An unauthenticated attacker can exploit a JSSE vulnerability in Java SE to read and modify accessible data via network access. - **Severity:** Medium 4.8 (`CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N`) - **Exploited in the wild:** Not known - **Login needed:** Not needed - **Attackable:** Over the internet - **Victim action needed:** Not needed - **Fix available:** Yes - **Published:** 15 Jan 2020 - **Updated:** 30 Sep 2024 - **Also known as:** BIT-java-2020-2655, BIT-java-min-2020-2655, BIT-jre-2020-2655, CLEANSTART-2026-KD91662, DEBIAN-CVE-2020-2655, GHSA-gf92-7rqx-hgfc, UBUNTU-CVE-2020-2655 ## What is CVE-2020-2655? CVE-2020-2655 is a medium-severity vulnerability in Debian Debian Linux, published on 15 Jan 2020. An attacker can exploit it over the internet without logging in, with no action from the victim. ### Official description Vulnerability in the Java SE product of Oracle Java SE (component: JSSE). Supported versions that are affected are Java SE: 11.0.5 and 13.0.1. Difficult to exploit vulnerability allows unauthenticated attacker with network access via HTTPS to compromise Java SE. Successful attacks of this vulnerability can result in unauthorized update, insert or delete access to some of Java SE accessible data as well as unauthorized read access to a subset of Java SE accessible data. Note: This vulnerability applies to Java deployments, typically in clients running sandboxed Java Web Start applications or sandboxed Java applets (in Java SE 8), that load and run untrusted code (e.g., code that comes from the internet) and rely on the Java sandbox for security. This vulnerability can also be exploited by using APIs in the specified Component, e.g., through a web service which supplies data to the APIs. CVSS 3.0 Base Score 4.8 (Confidentiality and Integrity impacts). CVSS Vector: (CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N). ## Which versions are affected by CVE-2020-2655? 3 open source packages ship an affected version, including java, java-min and jre. It affects 4 products. | Package | Ecosystem | Affected | Fixed in | | --- | --- | --- | --- | | `java` | Bitnami | From 11.0.5 to 11.0.5 | None | | `java-min` | Bitnami | From 11.0.5 to 11.0.5 | None | | `jre` | Bitnami | From 11.0.5 to 11.0.5 | None | Products: Debian Debian Linux, Oracle Jdk, Oracle Jre, Redhat Enterprise Linux. ## How do I fix CVE-2020-2655? Apply the vendor's patch. ## Is CVE-2020-2655 being exploited? There is no known exploitation of CVE-2020-2655 in the wild and no public exploit code. Public exploit code: - https://github.com/RUB-NDS/CVE-2020-2655-DemoServer (github_poc): https://github.com/RUB-NDS/CVE-2020-2655-DemoServer ## 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-2020-2655 and fix it if it is affected. What it is: CVE-2020-2655 is a medium-severity vulnerability in Debian Debian Linux, published on 15 Jan 2020. An attacker can exploit it over the internet without logging in, with no action from the victim. Exploitation: There is no known exploitation of CVE-2020-2655 in the wild and no public exploit code. Affected packages and fixed versions: - java (Bitnami): affected from 11.0.5 up to 11.0.5; no fix listed - java-min (Bitnami): affected from 11.0.5 up to 11.0.5; no fix listed - jre (Bitnami): affected from 11.0.5 up to 11.0.5; no fix listed 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-2020-2655/ (Markdown: https://insights.sbomify.com/CVE-2020-2655/index.md) ``` ## Sources - CVE record: https://www.cve.org/CVERecord?id=CVE-2020-2655 - NVD: https://nvd.nist.gov/vuln/detail/CVE-2020-2655 - OSV: https://osv.dev/vulnerability/CVE-2020-2655 --- From sbomify Insights: https://insights.sbomify.com/CVE-2020-2655/ Summaries are generated and may contain mistakes; the official description above is the record.