# CVE-2020-11078: CRLF injection in httplib2 > Attackers can inject CRLF sequences into HTTP requests via unescaped URIs, modifying headers or sending hidden requests in httplib2. - **Severity:** Medium 6.8 (`CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:H/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 May 2020 - **Updated:** 4 Aug 2024 - **Also known as:** AZL-109469, DEBIAN-CVE-2020-11078, DLA-2232-1, GHSA-gg84-qgv9-w4pq, MGASA-2020-0269, PYSEC-2020-46, RHSA-2020:4605, RHSA-2020:5003, RHSA-2020:5004, UBUNTU-CVE-2020-11078 ## What is CVE-2020-11078? CVE-2020-11078 is a medium-severity vulnerability in Debian Debian Linux, published on 20 May 2020. An attacker can exploit it over the internet without logging in, with no action from the victim. ### Official description In httplib2 before version 0.18.0, an attacker controlling unescaped part of uri for `httplib2.Http.request()` could change request headers and body, send additional hidden requests to same server. This vulnerability impacts software that uses httplib2 with uri constructed by string concatenation, as opposed to proper urllib building with escaping. This has been fixed in 0.18.0. Weakness: CWE-74 (Improper Neutralization of Special Elements in Output Used by a Downstream Component), CWE-93 (Improper Neutralization of CRLF Sequences) ## Which versions are affected by CVE-2020-11078? 3 open source packages ship an affected version, including httplib2. It affects 3 products. | Package | Ecosystem | Affected | Fixed in | | --- | --- | --- | --- | | `httplib2` | PyPI | All versions | 0.18.0 | | `httplib2` | PyPI | All versions | 0.18.0 | | `httplib2` | PyPI | All versions | 0.18.0 | | `fence-agents-debuginfo` | Red Hat:enterprise_linux:7::computenode | All versions | 0:4.2.1-41.el7_9.2 | | `fence-agents-lpar` | Red Hat:enterprise_linux:7::computenode | All versions | 0:4.2.1-41.el7_9.2 | | `fence-agents-virsh` | Red Hat:enterprise_linux:7::computenode | All versions | 0:4.2.1-41.el7_9.2 | | `fence-agents` | Red Hat:enterprise_linux:7::server | All versions | 0:4.2.1-41.el7_9.2 | | `fence-agents-aliyun` | Red Hat:enterprise_linux:7::server | All versions | 0:4.2.1-41.el7_9.2 | | `fence-agents-all` | Red Hat:enterprise_linux:7::server | All versions | 0:4.2.1-41.el7_9.2 | | `fence-agents-amt-ws` | Red Hat:enterprise_linux:7::server | All versions | 0:4.2.1-41.el7_9.2 | | `fence-agents-apc` | Red Hat:enterprise_linux:7::server | All versions | 0:4.2.1-41.el7_9.2 | | `fence-agents-apc-snmp` | Red Hat:enterprise_linux:7::server | All versions | 0:4.2.1-41.el7_9.2 | | `fence-agents-aws` | Red Hat:enterprise_linux:7::server | All versions | 0:4.2.1-41.el7_9.2 | | `fence-agents-azure-arm` | Red Hat:enterprise_linux:7::server | All versions | 0:4.2.1-41.el7_9.2 | | `fence-agents-bladecenter` | Red Hat:enterprise_linux:7::server | All versions | 0:4.2.1-41.el7_9.2 | | `fence-agents-brocade` | Red Hat:enterprise_linux:7::server | All versions | 0:4.2.1-41.el7_9.2 | | `fence-agents-cisco-mds` | Red Hat:enterprise_linux:7::server | All versions | 0:4.2.1-41.el7_9.2 | | `fence-agents-cisco-ucs` | Red Hat:enterprise_linux:7::server | All versions | 0:4.2.1-41.el7_9.2 | | `fence-agents-common` | Red Hat:enterprise_linux:7::server | All versions | 0:4.2.1-41.el7_9.2 | | `fence-agents-compute` | Red Hat:enterprise_linux:7::server | All versions | 0:4.2.1-41.el7_9.2 | | `fence-agents-debuginfo` | Red Hat:enterprise_linux:7::server | All versions | 0:4.2.1-41.el7_9.2 | | `fence-agents-drac5` | Red Hat:enterprise_linux:7::server | All versions | 0:4.2.1-41.el7_9.2 | | `fence-agents-eaton-snmp` | Red Hat:enterprise_linux:7::server | All versions | 0:4.2.1-41.el7_9.2 | | `fence-agents-emerson` | Red Hat:enterprise_linux:7::server | All versions | 0:4.2.1-41.el7_9.2 | | `fence-agents-eps` | Red Hat:enterprise_linux:7::server | All versions | 0:4.2.1-41.el7_9.2 | | `fence-agents-gce` | Red Hat:enterprise_linux:7::server | All versions | 0:4.2.1-41.el7_9.2 | | `fence-agents-heuristics-ping` | Red Hat:enterprise_linux:7::server | All versions | 0:4.2.1-41.el7_9.2 | | `fence-agents-hpblade` | Red Hat:enterprise_linux:7::server | All versions | 0:4.2.1-41.el7_9.2 | | `fence-agents-ibmblade` | Red Hat:enterprise_linux:7::server | All versions | 0:4.2.1-41.el7_9.2 | | `fence-agents-ifmib` | Red Hat:enterprise_linux:7::server | All versions | 0:4.2.1-41.el7_9.2 | | `fence-agents-ilo-moonshot` | Red Hat:enterprise_linux:7::server | All versions | 0:4.2.1-41.el7_9.2 | | `fence-agents-ilo-mp` | Red Hat:enterprise_linux:7::server | All versions | 0:4.2.1-41.el7_9.2 | | `fence-agents-ilo-ssh` | Red Hat:enterprise_linux:7::server | All versions | 0:4.2.1-41.el7_9.2 | | `fence-agents-ilo2` | Red Hat:enterprise_linux:7::server | All versions | 0:4.2.1-41.el7_9.2 | | `fence-agents-intelmodular` | Red Hat:enterprise_linux:7::server | All versions | 0:4.2.1-41.el7_9.2 | | `fence-agents-ipdu` | Red Hat:enterprise_linux:7::server | All versions | 0:4.2.1-41.el7_9.2 | | `fence-agents-ipmilan` | Red Hat:enterprise_linux:7::server | All versions | 0:4.2.1-41.el7_9.2 | | `fence-agents-kdump` | Red Hat:enterprise_linux:7::server | All versions | 0:4.2.1-41.el7_9.2 | | `fence-agents-lpar` | Red Hat:enterprise_linux:7::server | All versions | 0:4.2.1-41.el7_9.2 | | `fence-agents-mpath` | Red Hat:enterprise_linux:7::server | All versions | 0:4.2.1-41.el7_9.2 | Products: Debian Debian Linux, Fedoraproject Fedora, Httplib2 Project Httplib2. ## How do I fix CVE-2020-11078? Upgrade httplib2 to 0.18.0 or later. ## Is CVE-2020-11078 being exploited? There is no known exploitation of CVE-2020-11078 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-2020-11078 and fix it if it is affected. What it is: CVE-2020-11078 is a medium-severity vulnerability in Debian Debian Linux, published on 20 May 2020. 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-2020-11078 in the wild and no public exploit code. Affected packages and fixed versions: - httplib2 (PyPI): affected all versions; fixed in 0.18.0 - httplib2 (PyPI): affected all versions; fixed in 0.18.0 - httplib2 (PyPI): affected all versions; fixed in 0.18.0 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-2020-11078/ (Markdown: https://insights.sbomify.com/CVE-2020-11078/index.md) ``` ## Sources - CVE record: https://www.cve.org/CVERecord?id=CVE-2020-11078 - NVD: https://nvd.nist.gov/vuln/detail/CVE-2020-11078 - OSV: https://osv.dev/vulnerability/CVE-2020-11078 --- From sbomify Insights: https://insights.sbomify.com/CVE-2020-11078/ Summaries are generated and may contain mistakes; the official description above is the record.