# CVE-2015-3183: Other in n/a > Remote attackers can perform HTTP request smuggling via crafted requests due to improper chunk header parsing in Apache HTTP Server. - **Severity:** Medium 5.0 (`AV:N/AC:L/Au:N/C:N/I:P/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:** 20 Jul 2015 - **Updated:** 6 Aug 2024 - **Also known as:** DEBIAN-CVE-2015-3183, DLA-284-1, GHSA-892q-vvcr-v6j5, RHSA-2015:1668, SUSE-SU-2015:1885-1, SUSE-SU-2015:1885-2, UBUNTU-CVE-2015-3183 ## What is CVE-2015-3183? CVE-2015-3183 is a medium-severity vulnerability in Apache Http Server, published on 20 Jul 2015. An attacker can exploit it over the internet without logging in, with no action from the victim. ### Official description The chunked transfer coding implementation in the Apache HTTP Server before 2.4.14 does not properly parse chunk headers, which allows remote attackers to conduct HTTP request smuggling attacks via a crafted request, related to mishandling of large chunk-size values and invalid chunk-extension characters in modules/http/http_filters.c. Weakness: CWE-20 (Improper Input Validation), CWE-17 ## Which versions are affected by CVE-2015-3183? It affects 1 product. | Package | Ecosystem | Affected | Fixed in | | --- | --- | --- | --- | | `httpd` | Red Hat:enterprise_linux:6::client | All versions | 0:2.2.15-47.el6_7 | | `httpd-debuginfo` | Red Hat:enterprise_linux:6::client | All versions | 0:2.2.15-47.el6_7 | | `httpd-devel` | Red Hat:enterprise_linux:6::client | All versions | 0:2.2.15-47.el6_7 | | `httpd-manual` | Red Hat:enterprise_linux:6::client | All versions | 0:2.2.15-47.el6_7 | | `httpd-tools` | Red Hat:enterprise_linux:6::client | All versions | 0:2.2.15-47.el6_7 | | `mod_ssl` | Red Hat:enterprise_linux:6::client | All versions | 1:2.2.15-47.el6_7 | | `httpd` | Red Hat:enterprise_linux:6::computenode | All versions | 0:2.2.15-47.el6_7 | | `httpd-debuginfo` | Red Hat:enterprise_linux:6::computenode | All versions | 0:2.2.15-47.el6_7 | | `httpd-devel` | Red Hat:enterprise_linux:6::computenode | All versions | 0:2.2.15-47.el6_7 | | `httpd-manual` | Red Hat:enterprise_linux:6::computenode | All versions | 0:2.2.15-47.el6_7 | | `httpd-tools` | Red Hat:enterprise_linux:6::computenode | All versions | 0:2.2.15-47.el6_7 | | `mod_ssl` | Red Hat:enterprise_linux:6::computenode | All versions | 1:2.2.15-47.el6_7 | | `httpd` | Red Hat:enterprise_linux:6::server | All versions | 0:2.2.15-47.el6_7 | | `httpd-debuginfo` | Red Hat:enterprise_linux:6::server | All versions | 0:2.2.15-47.el6_7 | | `httpd-devel` | Red Hat:enterprise_linux:6::server | All versions | 0:2.2.15-47.el6_7 | | `httpd-manual` | Red Hat:enterprise_linux:6::server | All versions | 0:2.2.15-47.el6_7 | | `httpd-tools` | Red Hat:enterprise_linux:6::server | All versions | 0:2.2.15-47.el6_7 | | `mod_ssl` | Red Hat:enterprise_linux:6::server | All versions | 1:2.2.15-47.el6_7 | | `httpd` | Red Hat:enterprise_linux:6::workstation | All versions | 0:2.2.15-47.el6_7 | | `httpd-debuginfo` | Red Hat:enterprise_linux:6::workstation | All versions | 0:2.2.15-47.el6_7 | | `httpd-devel` | Red Hat:enterprise_linux:6::workstation | All versions | 0:2.2.15-47.el6_7 | | `httpd-manual` | Red Hat:enterprise_linux:6::workstation | All versions | 0:2.2.15-47.el6_7 | | `httpd-tools` | Red Hat:enterprise_linux:6::workstation | All versions | 0:2.2.15-47.el6_7 | | `mod_ssl` | Red Hat:enterprise_linux:6::workstation | All versions | 1:2.2.15-47.el6_7 | | `apache2` | SUSE:Linux Enterprise Server 11 SP3 | All versions | 2.2.12-59.1 | | `apache2` | SUSE:Linux Enterprise Server 11 SP3 | All versions | 2.2.12-59.1 | | `apache2` | SUSE:Linux Enterprise Server 11 SP3-TERADATA | All versions | 2.2.12-59.1 | | `apache2` | SUSE:Linux Enterprise Server 11 SP3-TERADATA | All versions | 2.2.12-59.1 | | `apache2` | SUSE:Linux Enterprise Server 11 SP4 | All versions | 2.2.12-59.1 | | `apache2` | SUSE:Linux Enterprise Server 11 SP4 | All versions | 2.2.12-59.1 | | `apache2` | SUSE:Linux Enterprise Server for SAP Applications 11 SP3 | All versions | 2.2.12-59.1 | | `apache2` | SUSE:Linux Enterprise Server for SAP Applications 11 SP3 | All versions | 2.2.12-59.1 | | `apache2` | SUSE:Linux Enterprise Server for SAP Applications 11 SP4 | All versions | 2.2.12-59.1 | | `apache2` | SUSE:Linux Enterprise Server for SAP Applications 11 SP4 | All versions | 2.2.12-59.1 | | `apache2` | SUSE:Linux Enterprise Software Development Kit 11 SP3 | All versions | 2.2.12-59.1 | | `apache2` | SUSE:Linux Enterprise Software Development Kit 11 SP3 | All versions | 2.2.12-59.1 | | `apache2` | SUSE:Linux Enterprise Software Development Kit 11 SP4 | All versions | 2.2.12-59.1 | | `apache2` | SUSE:Linux Enterprise Software Development Kit 11 SP4 | All versions | 2.2.12-59.1 | | `apache2` | SUSE:Studio Onsite 1.3 | All versions | 2.2.12-59.1 | Products: Apache Http Server. ## How do I fix CVE-2015-3183? Upgrade to a fixed version. ## Is CVE-2015-3183 being exploited? There is no known exploitation of CVE-2015-3183 in the wild and no public exploit code. ## Other vulnerabilities in Apache Http Server - [CVE-2021-42013](https://insights.sbomify.com/CVE-2021-42013/): Apache HTTP Server Path Traversal (critical 9.8, exploited in the wild) - [CVE-2024-38475](https://insights.sbomify.com/CVE-2024-38475/): Apache HTTP Server Improper Escaping of Output (critical 9.1, exploited in the wild) - [CVE-2021-40438](https://insights.sbomify.com/CVE-2021-40438/): Apache HTTP Server-Side Request Forgery (SSRF) (critical 9.0, exploited in the wild) - [CVE-2019-0211](https://insights.sbomify.com/CVE-2019-0211/): Apache HTTP Server Privilege Escalation (high 7.8, exploited in the wild) - [CVE-2021-41773](https://insights.sbomify.com/CVE-2021-41773/): Apache HTTP Server Path Traversal (high 7.5, exploited in the wild) ## Fix prompt for AI coding agents ```text Check this codebase for CVE-2015-3183 and fix it if it is affected. What it is: CVE-2015-3183 is a medium-severity vulnerability in Apache Http Server, published on 20 Jul 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-2015-3183 in the wild and no public exploit code. Affected product: Apache Http Server. 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-2015-3183/ (Markdown: https://insights.sbomify.com/CVE-2015-3183/index.md) ``` ## Sources - CVE record: https://www.cve.org/CVERecord?id=CVE-2015-3183 - NVD: https://nvd.nist.gov/vuln/detail/CVE-2015-3183 - OSV: https://osv.dev/vulnerability/CVE-2015-3183 --- From sbomify Insights: https://insights.sbomify.com/CVE-2015-3183/ Summaries are generated and may contain mistakes; the official description above is the record.