# CVE-2015-7545: Command injection in n/a > Remote attackers can execute arbitrary code via malicious URLs in Git submodules due to improper protocol restrictions in remote helpers. - **Severity:** Critical 9.8 (`CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H`) - **Exploited in the wild:** Not known - **Login needed:** Not needed - **Attackable:** Over the internet - **Victim action needed:** Not needed - **Fix available:** Yes - **Published:** 13 Apr 2016 - **Updated:** 6 Aug 2024 - **Also known as:** DEBIAN-CVE-2015-7545, DSA-3435-1, GHSA-3rvg-chjx-7h2j, RHSA-2015:2515, RHSA-2015:2561, SUSE-SU-2015:2025-1, SUSE-SU-2015:2325-1, UBUNTU-CVE-2015-7545, USN-2835-1 ## What is CVE-2015-7545? CVE-2015-7545 is a critical command injection vulnerability in Canonical Ubuntu Linux, published on 13 Apr 2016. An attacker can exploit it over the internet without logging in, with no action from the victim. ### Official description The (1) git-remote-ext and (2) unspecified other remote helper programs in Git before 2.3.10, 2.4.x before 2.4.10, 2.5.x before 2.5.4, and 2.6.x before 2.6.1 do not properly restrict the allowed protocols, which might allow remote attackers to execute arbitrary code via a URL in a (a) .gitmodules file or (b) unknown other sources in a submodule. Weakness: CWE-284 (Improper Access Control), CWE-20 (Improper Input Validation) ## Which versions are affected by CVE-2015-7545? It affects 4 products. | Package | Ecosystem | Affected | Fixed in | | --- | --- | --- | --- | | `emacs-git` | Red Hat:enterprise_linux:7::client | All versions | 0:1.8.3.1-6.el7 | | `emacs-git-el` | Red Hat:enterprise_linux:7::client | All versions | 0:1.8.3.1-6.el7 | | `git` | Red Hat:enterprise_linux:7::client | All versions | 0:1.8.3.1-6.el7 | | `git-all` | Red Hat:enterprise_linux:7::client | All versions | 0:1.8.3.1-6.el7 | | `git-bzr` | Red Hat:enterprise_linux:7::client | All versions | 0:1.8.3.1-6.el7 | | `git-cvs` | Red Hat:enterprise_linux:7::client | All versions | 0:1.8.3.1-6.el7 | | `git-daemon` | Red Hat:enterprise_linux:7::client | All versions | 0:1.8.3.1-6.el7 | | `git-debuginfo` | Red Hat:enterprise_linux:7::client | All versions | 0:1.8.3.1-6.el7 | | `git-email` | Red Hat:enterprise_linux:7::client | All versions | 0:1.8.3.1-6.el7 | | `git-gui` | Red Hat:enterprise_linux:7::client | All versions | 0:1.8.3.1-6.el7 | | `git-hg` | Red Hat:enterprise_linux:7::client | All versions | 0:1.8.3.1-6.el7 | | `git-p4` | Red Hat:enterprise_linux:7::client | All versions | 0:1.8.3.1-6.el7 | | `git-svn` | Red Hat:enterprise_linux:7::client | All versions | 0:1.8.3.1-6.el7 | | `gitk` | Red Hat:enterprise_linux:7::client | All versions | 0:1.8.3.1-6.el7 | | `gitweb` | Red Hat:enterprise_linux:7::client | All versions | 0:1.8.3.1-6.el7 | | `perl-Git` | Red Hat:enterprise_linux:7::client | All versions | 0:1.8.3.1-6.el7 | | `perl-Git-SVN` | Red Hat:enterprise_linux:7::client | All versions | 0:1.8.3.1-6.el7 | | `emacs-git` | Red Hat:enterprise_linux:7::computenode | All versions | 0:1.8.3.1-6.el7 | | `emacs-git-el` | Red Hat:enterprise_linux:7::computenode | All versions | 0:1.8.3.1-6.el7 | | `git` | Red Hat:enterprise_linux:7::computenode | All versions | 0:1.8.3.1-6.el7 | | `git-all` | Red Hat:enterprise_linux:7::computenode | All versions | 0:1.8.3.1-6.el7 | | `git-bzr` | Red Hat:enterprise_linux:7::computenode | All versions | 0:1.8.3.1-6.el7 | | `git-cvs` | Red Hat:enterprise_linux:7::computenode | All versions | 0:1.8.3.1-6.el7 | | `git-daemon` | Red Hat:enterprise_linux:7::computenode | All versions | 0:1.8.3.1-6.el7 | | `git-debuginfo` | Red Hat:enterprise_linux:7::computenode | All versions | 0:1.8.3.1-6.el7 | | `git-email` | Red Hat:enterprise_linux:7::computenode | All versions | 0:1.8.3.1-6.el7 | | `git-gui` | Red Hat:enterprise_linux:7::computenode | All versions | 0:1.8.3.1-6.el7 | | `git-hg` | Red Hat:enterprise_linux:7::computenode | All versions | 0:1.8.3.1-6.el7 | | `git-p4` | Red Hat:enterprise_linux:7::computenode | All versions | 0:1.8.3.1-6.el7 | | `git-svn` | Red Hat:enterprise_linux:7::computenode | All versions | 0:1.8.3.1-6.el7 | | `gitk` | Red Hat:enterprise_linux:7::computenode | All versions | 0:1.8.3.1-6.el7 | | `gitweb` | Red Hat:enterprise_linux:7::computenode | All versions | 0:1.8.3.1-6.el7 | | `perl-Git` | Red Hat:enterprise_linux:7::computenode | All versions | 0:1.8.3.1-6.el7 | | `perl-Git-SVN` | Red Hat:enterprise_linux:7::computenode | All versions | 0:1.8.3.1-6.el7 | | `emacs-git` | Red Hat:enterprise_linux:7::server | All versions | 0:1.8.3.1-6.el7 | | `emacs-git-el` | Red Hat:enterprise_linux:7::server | All versions | 0:1.8.3.1-6.el7 | | `git` | Red Hat:enterprise_linux:7::server | All versions | 0:1.8.3.1-6.el7 | | `git-all` | Red Hat:enterprise_linux:7::server | All versions | 0:1.8.3.1-6.el7 | | `git-bzr` | Red Hat:enterprise_linux:7::server | All versions | 0:1.8.3.1-6.el7 | | `git-cvs` | Red Hat:enterprise_linux:7::server | All versions | 0:1.8.3.1-6.el7 | Products: Canonical Ubuntu Linux, Git Project Git, Opensuse Opensuse, Redhat Software Collections. ## How do I fix CVE-2015-7545? Upgrade to a fixed version. ## Is CVE-2015-7545 being exploited? There is no known exploitation of CVE-2015-7545 in the wild and no public exploit code. Public exploit code: - CVE-2015-7545 proof of concept (github_poc): https://github.com/avuserow/bug-free-chainsaw ## Other vulnerabilities in Canonical Ubuntu Linux - [CVE-2020-11651](https://insights.sbomify.com/CVE-2020-11651/): SaltStack Salt Authentication Bypass (critical 9.8, exploited in the wild) - [CVE-2020-7247](https://insights.sbomify.com/CVE-2020-7247/): OpenSMTPD Remote Code Execution (critical 9.8, exploited in the wild) - [CVE-2019-16928](https://insights.sbomify.com/CVE-2019-16928/): Exim Out-of-bounds Write (critical 9.8, exploited in the wild) - [CVE-2018-6789](https://insights.sbomify.com/CVE-2018-6789/): Exim Buffer Overflow (critical 9.8, exploited in the wild) - [CVE-2015-2590](https://insights.sbomify.com/CVE-2015-2590/): Oracle Java SE and Java SE Embedded Remote Code Execution (critical 9.8, exploited in the wild) ## Fix prompt for AI coding agents ```text Check this codebase for CVE-2015-7545 and fix it if it is affected. What it is: CVE-2015-7545 is a critical command injection vulnerability in Canonical Ubuntu Linux, published on 13 Apr 2016. 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-2015-7545 in the wild and no public exploit code. Affected product: Canonical Ubuntu 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-2015-7545/ (Markdown: https://insights.sbomify.com/CVE-2015-7545/index.md) ``` ## Sources - CVE record: https://www.cve.org/CVERecord?id=CVE-2015-7545 - NVD: https://nvd.nist.gov/vuln/detail/CVE-2015-7545 - OSV: https://osv.dev/vulnerability/CVE-2015-7545 --- From sbomify Insights: https://insights.sbomify.com/CVE-2015-7545/ Summaries are generated and may contain mistakes; the official description above is the record.