# CVE-2021-3200: Memory corruption in n/a > A buffer overflow in the libsolv library allows attackers to cause a denial of service via a crafted testcase file. - **Severity:** Low 3.3 (`CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L`) - **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:** 18 May 2021 - **Updated:** 3 Aug 2024 - **Also known as:** ALSA-2021:4408, CVE-2021-44569, CVE-2021-44570, CVE-2021-44571, CVE-2021-44573, CVE-2021-44574, CVE-2021-44575, CVE-2021-44576, CVE-2021-44577, DEBIAN-CVE-2021-3200, GHSA-cphx-qv3m-4vvc, MGASA-2021-0351, OESA-2021-1209, RHSA-2021:4408, RLSA-2021:4408, UBUNTU-CVE-2021-3200 ## What is CVE-2021-3200? CVE-2021-3200 is a low-severity memory corruption vulnerability in Oracle Communications Cloud Native Core Policy, published on 18 May 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 Buffer overflow vulnerability in libsolv 2020-12-13 via the Solver * testcase_read(Pool *pool, FILE *fp, const char *testcase, Queue *job, char **resultp, int *resultflagsp function at src/testcase.c: line 2334, which could cause a denial of service Weakness: CWE-120 (Buffer Copy without Checking Size of Input) ## Which versions are affected by CVE-2021-3200? It affects 2 products. | Package | Ecosystem | Affected | Fixed in | | --- | --- | --- | --- | | `libsolv-devel` | AlmaLinux:8 | All versions | 0.7.19-1.el8 | | `libsolv-tools` | AlmaLinux:8 | All versions | 0.7.19-1.el8 | | `libsolv` | Red Hat:enterprise_linux:8::baseos | All versions | 0:0.7.19-1.el8 | | `libsolv-debuginfo` | Red Hat:enterprise_linux:8::baseos | All versions | 0:0.7.19-1.el8 | | `libsolv-debugsource` | Red Hat:enterprise_linux:8::baseos | All versions | 0:0.7.19-1.el8 | | `libsolv-demo-debuginfo` | Red Hat:enterprise_linux:8::baseos | All versions | 0:0.7.19-1.el8 | | `libsolv-tools-debuginfo` | Red Hat:enterprise_linux:8::baseos | All versions | 0:0.7.19-1.el8 | | `perl-solv-debuginfo` | Red Hat:enterprise_linux:8::baseos | All versions | 0:0.7.19-1.el8 | | `python3-solv` | Red Hat:enterprise_linux:8::baseos | All versions | 0:0.7.19-1.el8 | | `python3-solv-debuginfo` | Red Hat:enterprise_linux:8::baseos | All versions | 0:0.7.19-1.el8 | | `ruby-solv-debuginfo` | Red Hat:enterprise_linux:8::baseos | All versions | 0:0.7.19-1.el8 | | `libsolv-debuginfo` | Red Hat:enterprise_linux:8::crb | All versions | 0:0.7.19-1.el8 | | `libsolv-debugsource` | Red Hat:enterprise_linux:8::crb | All versions | 0:0.7.19-1.el8 | | `libsolv-demo-debuginfo` | Red Hat:enterprise_linux:8::crb | All versions | 0:0.7.19-1.el8 | | `libsolv-devel` | Red Hat:enterprise_linux:8::crb | All versions | 0:0.7.19-1.el8 | | `libsolv-tools` | Red Hat:enterprise_linux:8::crb | All versions | 0:0.7.19-1.el8 | | `libsolv-tools-debuginfo` | Red Hat:enterprise_linux:8::crb | All versions | 0:0.7.19-1.el8 | | `perl-solv-debuginfo` | Red Hat:enterprise_linux:8::crb | All versions | 0:0.7.19-1.el8 | | `python3-solv-debuginfo` | Red Hat:enterprise_linux:8::crb | All versions | 0:0.7.19-1.el8 | | `ruby-solv-debuginfo` | Red Hat:enterprise_linux:8::crb | All versions | 0:0.7.19-1.el8 | | `libsolv` | Rocky Linux:8 | All versions | 0:0.7.19-1.el8 | Products: Opensuse Libsolv, Oracle Communications Cloud Native Core Policy. ## How do I fix CVE-2021-3200? Apply the vendor's patch. ## Is CVE-2021-3200 being exploited? There is no known exploitation of CVE-2021-3200 in the wild and no public exploit code. ## Other vulnerabilities in Oracle Communications Cloud Native Core Policy - [CVE-2026-48864](https://insights.sbomify.com/CVE-2026-48864/): Libsolv: heap buffer overflow in libsolv repopagestore via unchecked decompression of malicious .solv page data (high 7.8) - [CVE-2021-33928](https://insights.sbomify.com/CVE-2021-33928/): Memory corruption in n/a (high 7.5) - [CVE-2021-33929](https://insights.sbomify.com/CVE-2021-33929/): Memory corruption in n/a (high 7.5) - [CVE-2021-33930](https://insights.sbomify.com/CVE-2021-33930/): Memory corruption in n/a (high 7.5) - [CVE-2021-33938](https://insights.sbomify.com/CVE-2021-33938/): Memory corruption in n/a (high 7.5) ## Fix prompt for AI coding agents ```text Check this codebase for CVE-2021-3200 and fix it if it is affected. What it is: CVE-2021-3200 is a low-severity memory corruption vulnerability in Oracle Communications Cloud Native Core Policy, published on 18 May 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-2021-3200 in the wild and no public exploit code. Affected product: Oracle Communications Cloud Native Core Policy. 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-2021-3200/ (Markdown: https://insights.sbomify.com/CVE-2021-3200/index.md) ``` ## Sources - CVE record: https://www.cve.org/CVERecord?id=CVE-2021-3200 - NVD: https://nvd.nist.gov/vuln/detail/CVE-2021-3200 - OSV: https://osv.dev/vulnerability/CVE-2021-3200 --- From sbomify Insights: https://insights.sbomify.com/CVE-2021-3200/ Summaries are generated and may contain mistakes; the official description above is the record.