# CVE-2018-1283: Other in Apache HTTP Server

> Remote attackers can modify session data in CGI applications when mod_session is configured to forward session data via headers.

- **Severity:** Medium 5.3 (`CVSS:3.0/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:H/A:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** Yes
- **Published:** 26 Mar 2018
- **Updated:** 16 Sep 2024
- **Also known as:** ALPINE-CVE-2018-1283, CLEANSTART-2026-LA57520, DEBIAN-CVE-2018-1283, GHSA-69h6-845f-grx4, UBUNTU-CVE-2018-1283

## What is CVE-2018-1283?

CVE-2018-1283 is a medium-severity vulnerability in Apache Http Server, published on 26 Mar 2018. Any signed-in user can exploit it over the network, with no action from the victim.

### Official description

In Apache httpd 2.4.0 to 2.4.29, when mod_session is configured to forward its session data to CGI applications (SessionEnv on, not the default), a remote user may influence their content by using a "Session" header. This comes from the "HTTP_SESSION" variable name used by mod_session to forward its data to CGIs, since the prefix "HTTP_" is also used by the Apache HTTP Server to pass HTTP header fields, per CGI specifications.

## Which versions are affected by CVE-2018-1283?

It affects 8 products.


Products: Apache Http Server, Canonical Ubuntu Linux, Debian Debian Linux, Netapp Clustered Data Ontap, Netapp Santricity Cloud Connector, Netapp Storage Automation Store, Netapp Storagegrid, Redhat Enterprise Linux.

## How do I fix CVE-2018-1283?

Upgrade to a fixed version.

## Is CVE-2018-1283 being exploited?

There is no known exploitation of CVE-2018-1283 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-2018-1283 and fix it if it is affected.

What it is: CVE-2018-1283 is a medium-severity vulnerability in Apache Http Server, published on 26 Mar 2018. Any signed-in user can exploit it over the network, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2018-1283 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-2018-1283/ (Markdown: https://insights.sbomify.com/CVE-2018-1283/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2018-1283
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2018-1283
- OSV: https://osv.dev/vulnerability/CVE-2018-1283

---
From sbomify Insights: https://insights.sbomify.com/CVE-2018-1283/
Summaries are generated and may contain mistakes; the official description above is the record.