# CVE-2015-1782: Denial of service in n/a > A remote server can crash the libssh2 client by sending crafted SSH key exchange initialization packets, causing a denial of service. - **Severity:** Medium 6.8 (`AV:N/AC:M/Au:N/C:P/I:P/A:P`) - **Exploited in the wild:** Not known - **Login needed:** Not needed - **Attackable:** Over the internet - **Victim action needed:** Not needed - **Fix available:** Yes - **Published:** 13 Mar 2015 - **Updated:** 6 Aug 2024 - **Also known as:** DEBIAN-CVE-2015-1782, DLA-171-1, DSA-3182-1, GHSA-47g3-jvrj-pm9m, MGASA-2015-0107, RHSA-2015:2140, SUSE-SU-2015:0669-1, SUSE-SU-2015:0676-1, UBUNTU-CVE-2015-1782 ## What is CVE-2015-1782? CVE-2015-1782 is a medium-severity denial of service vulnerability in Debian Debian Linux, published on 13 Mar 2015. An attacker can exploit it over the internet without logging in, with no action from the victim. ### Official description The kex_agree_methods function in libssh2 before 1.5.0 allows remote servers to cause a denial of service (crash) or have other unspecified impact via crafted length values in an SSH_MSG_KEXINIT packet. Weakness: CWE-20 (Improper Input Validation) ## Which versions are affected by CVE-2015-1782? It affects 3 products. | Package | Ecosystem | Affected | Fixed in | | --- | --- | --- | --- | | `libssh2` | Red Hat:enterprise_linux:7::client | All versions | 0:1.4.3-10.el7 | | `libssh2-debuginfo` | Red Hat:enterprise_linux:7::client | All versions | 0:1.4.3-10.el7 | | `libssh2-devel` | Red Hat:enterprise_linux:7::client | All versions | 0:1.4.3-10.el7 | | `libssh2-docs` | Red Hat:enterprise_linux:7::client | All versions | 0:1.4.3-10.el7 | | `libssh2` | Red Hat:enterprise_linux:7::computenode | All versions | 0:1.4.3-10.el7 | | `libssh2-debuginfo` | Red Hat:enterprise_linux:7::computenode | All versions | 0:1.4.3-10.el7 | | `libssh2-devel` | Red Hat:enterprise_linux:7::computenode | All versions | 0:1.4.3-10.el7 | | `libssh2-docs` | Red Hat:enterprise_linux:7::computenode | All versions | 0:1.4.3-10.el7 | | `libssh2` | Red Hat:enterprise_linux:7::server | All versions | 0:1.4.3-10.el7 | | `libssh2-debuginfo` | Red Hat:enterprise_linux:7::server | All versions | 0:1.4.3-10.el7 | | `libssh2-devel` | Red Hat:enterprise_linux:7::server | All versions | 0:1.4.3-10.el7 | | `libssh2-docs` | Red Hat:enterprise_linux:7::server | All versions | 0:1.4.3-10.el7 | | `libssh2` | Red Hat:enterprise_linux:7::workstation | All versions | 0:1.4.3-10.el7 | | `libssh2-debuginfo` | Red Hat:enterprise_linux:7::workstation | All versions | 0:1.4.3-10.el7 | | `libssh2-devel` | Red Hat:enterprise_linux:7::workstation | All versions | 0:1.4.3-10.el7 | | `libssh2-docs` | Red Hat:enterprise_linux:7::workstation | All versions | 0:1.4.3-10.el7 | | `libssh2_org` | SUSE:Linux Enterprise Desktop 12 | All versions | 1.4.3-11.1 | | `libssh2_org` | SUSE:Linux Enterprise Server 12 | All versions | 1.4.3-11.1 | | `libssh2_org` | SUSE:Linux Enterprise Server for SAP Applications 12 | All versions | 1.4.3-11.1 | | `libssh2_org` | SUSE:Linux Enterprise Software Development Kit 12 | All versions | 1.4.3-11.1 | Products: Debian Debian Linux, Fedoraproject Fedora, Libssh2 Libssh2. ## How do I fix CVE-2015-1782? Upgrade to a fixed version. ## Is CVE-2015-1782 being exploited? There is no known exploitation of CVE-2015-1782 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-2015-1782 and fix it if it is affected. What it is: CVE-2015-1782 is a medium-severity denial of service vulnerability in Debian Debian Linux, published on 13 Mar 2015. 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-2015-1782 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-2015-1782/ (Markdown: https://insights.sbomify.com/CVE-2015-1782/index.md) ``` ## Sources - CVE record: https://www.cve.org/CVERecord?id=CVE-2015-1782 - NVD: https://nvd.nist.gov/vuln/detail/CVE-2015-1782 - OSV: https://osv.dev/vulnerability/CVE-2015-1782 --- From sbomify Insights: https://insights.sbomify.com/CVE-2015-1782/ Summaries are generated and may contain mistakes; the official description above is the record.