CVE-2020-22218 Memory corruption in n/a
High 7.5
Published
Updated
Check this codebase for CVE-2020-22218 and fix it if it is affected.
What it is: CVE-2020-22218 is a high-severity memory corruption vulnerability in n/a, published on 22 Aug 2023. 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-2020-22218 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-2020-22218/ (Markdown: https://insights.sbomify.com/CVE-2020-22218/index.md)
Attackers can trigger out-of-bounds memory access in libssh2, potentially leading to code execution or denial of service.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2020-22218?
CVE-2020-22218 is a high-severity memory corruption vulnerability in n/a, published on 22 Aug 2023. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
An issue was discovered in function _libssh2_packet_add in libssh2 1.10.0 allows attackers to access out of bounds memory.
Weakness: CWE-787
Which versions are affected by CVE-2020-22218?
It affects 1 product.
Linux distribution packages (40)
libssh2 Red Hat:enterprise_linux:7::client | All versions | 0:1.8.0-4.el7_9.1 |
libssh2-debuginfo Red Hat:enterprise_linux:7::client | All versions | 0:1.8.0-4.el7_9.1 |
libssh2-devel Red Hat:enterprise_linux:7::client | All versions | 0:1.8.0-4.el7_9.1 |
libssh2-docs Red Hat:enterprise_linux:7::client | All versions | 0:1.8.0-4.el7_9.1 |
libssh2-debuginfo Red Hat:enterprise_linux:7::computenode | All versions | 0:1.8.0-4.el7_9.1 |
libssh2-devel Red Hat:enterprise_linux:7::computenode | All versions | 0:1.8.0-4.el7_9.1 |
libssh2-docs Red Hat:enterprise_linux:7::computenode | All versions | 0:1.8.0-4.el7_9.1 |
libssh2 Red Hat:enterprise_linux:7::server | All versions | 0:1.8.0-4.el7_9.1 |
libssh2-debuginfo Red Hat:enterprise_linux:7::server | All versions | 0:1.8.0-4.el7_9.1 |
libssh2-devel Red Hat:enterprise_linux:7::server | All versions | 0:1.8.0-4.el7_9.1 |
libssh2-docs Red Hat:enterprise_linux:7::server | All versions | 0:1.8.0-4.el7_9.1 |
libssh2 Red Hat:enterprise_linux:7::workstation | All versions | 0:1.8.0-4.el7_9.1 |
libssh2-debuginfo Red Hat:enterprise_linux:7::workstation | All versions | 0:1.8.0-4.el7_9.1 |
libssh2-devel Red Hat:enterprise_linux:7::workstation | All versions | 0:1.8.0-4.el7_9.1 |
libssh2-docs Red Hat:enterprise_linux:7::workstation | All versions | 0:1.8.0-4.el7_9.1 |
libssh2_org SUSE:Enterprise Storage 7 | All versions | 1.9.0-150000.4.16.1 |
libssh2_org SUSE:Enterprise Storage 7.1 | All versions | 1.9.0-150000.4.16.1 |
libssh2_org SUSE:Linux Enterprise High Performance Computing 15 SP1-LTSS | All versions | 1.9.0-150000.4.16.1 |
libssh2_org SUSE:Linux Enterprise High Performance Computing 15 SP2-LTSS | All versions | 1.9.0-150000.4.16.1 |
libssh2_org SUSE:Linux Enterprise High Performance Computing 15 SP3-ESPOS | All versions | 1.9.0-150000.4.16.1 |
libssh2_org SUSE:Linux Enterprise High Performance Computing 15 SP3-LTSS | All versions | 1.9.0-150000.4.16.1 |
libssh2_org SUSE:Linux Enterprise Micro 5.1 | All versions | 1.9.0-150000.4.16.1 |
libssh2_org SUSE:Linux Enterprise Micro 5.2 | All versions | 1.9.0-150000.4.16.1 |
libssh2_org SUSE:Linux Enterprise Micro 5.3 | All versions | 1.9.0-150000.4.16.1 |
libssh2_org SUSE:Linux Enterprise Micro 5.4 | All versions | 1.9.0-150000.4.16.1 |
libssh2_org SUSE:Linux Enterprise Module for Basesystem 15 SP4 | All versions | 1.9.0-150000.4.16.1 |
libssh2_org SUSE:Linux Enterprise Module for Basesystem 15 SP5 | All versions | 1.9.0-150000.4.16.1 |
libssh2_org SUSE:Linux Enterprise Server 12 SP5 | All versions | 1.4.3-26.5.1 |
libssh2_org SUSE:Linux Enterprise Server 15 SP1-LTSS | All versions | 1.9.0-150000.4.16.1 |
libssh2_org SUSE:Linux Enterprise Server 15 SP2-LTSS | All versions | 1.9.0-150000.4.16.1 |
libssh2_org SUSE:Linux Enterprise Server 15 SP3-LTSS | All versions | 1.9.0-150000.4.16.1 |
libssh2_org SUSE:Linux Enterprise Server for SAP Applications 12 SP5 | All versions | 1.4.3-26.5.1 |
libssh2_org SUSE:Linux Enterprise Server for SAP Applications 15 SP1 | All versions | 1.9.0-150000.4.16.1 |
libssh2_org SUSE:Linux Enterprise Server for SAP Applications 15 SP2 | All versions | 1.9.0-150000.4.16.1 |
libssh2_org SUSE:Linux Enterprise Server for SAP Applications 15 SP3 | All versions | 1.9.0-150000.4.16.1 |
libssh2_org SUSE:Linux Enterprise Software Development Kit 12 SP5 | All versions | 1.4.3-26.5.1 |
libssh2_org SUSE:Manager Proxy 4.2 | All versions | 1.9.0-150000.4.16.1 |
libssh2_org SUSE:Manager Server 4.2 | All versions | 1.9.0-150000.4.16.1 |
libssh2_org openSUSE:Leap 15.4 | All versions | 1.9.0-150000.4.16.1 |
libssh2_org openSUSE:Leap 15.5 | All versions | 1.9.0-150000.4.16.1 |
Products include Libssh2 Libssh2.
How do I fix CVE-2020-22218?
Upgrade to a fixed version.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2020-22218 being exploited?
There is no known exploitation of CVE-2020-22218 in the wild and no public exploit code.
Other vulnerabilities in n/a
- CVE-2026-55200 libssh2 - Out-of-Bounds Write via Unchecked packet_length in transport.c
- CVE-2026-66032 libssh2 Double-Free Heap Corruption via sftp_open()
- CVE-2026-66033 libssh2 Integer Underflow DoS via AES-GCM Cipher Negotiation
- CVE-2026-58050 libssh2 - Integer Overflow in publickey Subsystem Attribute Allocation
- CVE-2026-58051 libssh2 - Free of Uninitialized Pointer in publickey List Cleanup
Sources
Also known as AZL-28594, CLSA-2023-1695835334, CLSA-2023-1695835423, CLSA-2023-1695835793, DEBIAN-CVE-2020-22218, GHSA-4wvm-v4fc-prp5 and 6 more.