CVE-2020-11985 Security feature bypass in Apache HTTP Server
Medium 5.3
Published
Updated
Check this codebase for CVE-2020-11985 and fix it if it is affected.
What it is: CVE-2020-11985 is a medium-severity vulnerability in Apache Http Server, published on 7 Aug 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-2020-11985 in the wild and no public exploit code.
Affected packages and fixed versions:
- apache (Bitnami): affected from 2.4.1; fixed in 2.4.24
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-2020-11985/ (Markdown: https://insights.sbomify.com/CVE-2020-11985/index.md)
Attackers can spoof IP addresses in logs and PHP scripts when using mod_remoteip with specific mod_rewrite rules, bypassing IP-based security controls.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2020-11985?
CVE-2020-11985 is a medium-severity vulnerability in Apache Http Server, published on 7 Aug 2020. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
IP address spoofing when proxying using mod_remoteip and mod_rewrite For configurations using proxying with mod_remoteip and certain mod_rewrite rules, an attacker could spoof their IP address for logging and PHP scripts. Note this issue was fixed in Apache HTTP Server 2.4.24 but was retrospectively allocated a low severity CVE in 2020.
Weakness: CWE-345
Which versions are affected by CVE-2020-11985?
1 open source package ship an affected version, including apache. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
apache Bitnami | From 2.4.1 | 2.4.24 |
Linux distribution packages (36)
httpd Red Hat:enterprise_linux:7::client | All versions | 0:2.4.6-40.el7 |
httpd-debuginfo Red Hat:enterprise_linux:7::client | All versions | 0:2.4.6-40.el7 |
httpd-devel Red Hat:enterprise_linux:7::client | All versions | 0:2.4.6-40.el7 |
httpd-manual Red Hat:enterprise_linux:7::client | All versions | 0:2.4.6-40.el7 |
httpd-tools Red Hat:enterprise_linux:7::client | All versions | 0:2.4.6-40.el7 |
mod_ldap Red Hat:enterprise_linux:7::client | All versions | 0:2.4.6-40.el7 |
mod_proxy_html Red Hat:enterprise_linux:7::client | All versions | 1:2.4.6-40.el7 |
mod_session Red Hat:enterprise_linux:7::client | All versions | 0:2.4.6-40.el7 |
mod_ssl Red Hat:enterprise_linux:7::client | All versions | 1:2.4.6-40.el7 |
httpd Red Hat:enterprise_linux:7::computenode | All versions | 0:2.4.6-40.el7 |
httpd-debuginfo Red Hat:enterprise_linux:7::computenode | All versions | 0:2.4.6-40.el7 |
httpd-devel Red Hat:enterprise_linux:7::computenode | All versions | 0:2.4.6-40.el7 |
httpd-manual Red Hat:enterprise_linux:7::computenode | All versions | 0:2.4.6-40.el7 |
httpd-tools Red Hat:enterprise_linux:7::computenode | All versions | 0:2.4.6-40.el7 |
mod_ldap Red Hat:enterprise_linux:7::computenode | All versions | 0:2.4.6-40.el7 |
mod_proxy_html Red Hat:enterprise_linux:7::computenode | All versions | 1:2.4.6-40.el7 |
mod_session Red Hat:enterprise_linux:7::computenode | All versions | 0:2.4.6-40.el7 |
mod_ssl Red Hat:enterprise_linux:7::computenode | All versions | 1:2.4.6-40.el7 |
httpd Red Hat:enterprise_linux:7::server | All versions | 0:2.4.6-40.el7 |
httpd-debuginfo Red Hat:enterprise_linux:7::server | All versions | 0:2.4.6-40.el7 |
httpd-devel Red Hat:enterprise_linux:7::server | All versions | 0:2.4.6-40.el7 |
httpd-manual Red Hat:enterprise_linux:7::server | All versions | 0:2.4.6-40.el7 |
httpd-tools Red Hat:enterprise_linux:7::server | All versions | 0:2.4.6-40.el7 |
mod_ldap Red Hat:enterprise_linux:7::server | All versions | 0:2.4.6-40.el7 |
mod_proxy_html Red Hat:enterprise_linux:7::server | All versions | 1:2.4.6-40.el7 |
mod_session Red Hat:enterprise_linux:7::server | All versions | 0:2.4.6-40.el7 |
mod_ssl Red Hat:enterprise_linux:7::server | All versions | 1:2.4.6-40.el7 |
httpd Red Hat:enterprise_linux:7::workstation | All versions | 0:2.4.6-40.el7 |
httpd-debuginfo Red Hat:enterprise_linux:7::workstation | All versions | 0:2.4.6-40.el7 |
httpd-devel Red Hat:enterprise_linux:7::workstation | All versions | 0:2.4.6-40.el7 |
httpd-manual Red Hat:enterprise_linux:7::workstation | All versions | 0:2.4.6-40.el7 |
httpd-tools Red Hat:enterprise_linux:7::workstation | All versions | 0:2.4.6-40.el7 |
mod_ldap Red Hat:enterprise_linux:7::workstation | All versions | 0:2.4.6-40.el7 |
mod_proxy_html Red Hat:enterprise_linux:7::workstation | All versions | 1:2.4.6-40.el7 |
mod_session Red Hat:enterprise_linux:7::workstation | All versions | 0:2.4.6-40.el7 |
mod_ssl Red Hat:enterprise_linux:7::workstation | All versions | 1:2.4.6-40.el7 |
Products include Apache Http Server.
How do I fix CVE-2020-11985?
Upgrade apache to 2.4.24 or later.
Is CVE-2020-11985 being exploited?
There is no known exploitation of CVE-2020-11985 in the wild and no public exploit code.
Other vulnerabilities in Apache Http Server
Sources
Also known as BIT-apache-2020-11985, DEBIAN-CVE-2020-11985, GHSA-39vm-h38v-j867, RHBA-2015:2194, UBUNTU-CVE-2020-11985.