# CVE-2018-1000007: Information disclosure in n/a

> libcurl leaks sensitive authentication headers to third-party hosts during HTTP redirects, potentially exposing credentials to attackers.

- **Severity:** Critical 9.8 (`CVSS:3.1/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:** 24 Jan 2018
- **Updated:** 5 Aug 2024
- **Also known as:** CURL-CVE-2018-1000007, DEBIAN-CVE-2018-1000007, DLA-1263-1, DSA-4098-1, GHSA-g7x2-hrfp-pv5f, SUSE-SU-2018:0217-1, UBUNTU-CVE-2018-1000007

## What is CVE-2018-1000007?

CVE-2018-1000007 is a critical vulnerability in Canonical Ubuntu Linux, published on 24 Jan 2018. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

libcurl 7.1 through 7.57.0 might accidentally leak authentication data to third parties. When asked to send custom headers in its HTTP requests, libcurl will send that set of headers first to the host in the initial URL but also, if asked to follow redirects and a 30X HTTP response code is returned, to the host mentioned in URL in the `Location:` response header value. Sending the same set of headers to subsequent hosts is in particular a problem for applications that pass on custom `Authorization:` headers, as this header often contains privacy sensitive information or data that could allow others to impersonate the libcurl-using client's request.

## Which versions are affected by CVE-2018-1000007?

It affects 14 products.


| Package | Ecosystem | Affected | Fixed in |
| --- | --- | --- | --- |
| `curl` | SUSE:Linux Enterprise Desktop 12 SP2 | All versions | 7.37.0-37.14.1 |
| `curl` | SUSE:Linux Enterprise Desktop 12 SP3 | All versions | 7.37.0-37.14.1 |
| `curl` | SUSE:Linux Enterprise Server 12 SP2 | All versions | 7.37.0-37.14.1 |
| `curl` | SUSE:Linux Enterprise Server 12 SP3 | All versions | 7.37.0-37.14.1 |
| `curl` | SUSE:Linux Enterprise Server for Raspberry Pi 12 SP2 | All versions | 7.37.0-37.14.1 |
| `curl` | SUSE:Linux Enterprise Server for SAP Applications 12 SP2 | All versions | 7.37.0-37.14.1 |
| `curl` | SUSE:Linux Enterprise Server for SAP Applications 12 SP3 | All versions | 7.37.0-37.14.1 |
| `curl` | SUSE:Linux Enterprise Software Development Kit 12 SP2 | All versions | 7.37.0-37.14.1 |
| `curl` | SUSE:Linux Enterprise Software Development Kit 12 SP3 | All versions | 7.37.0-37.14.1 |

Products: Canonical Ubuntu Linux, Debian Debian Linux, Fujitsu M10-1 Firmware, Fujitsu M10-4 Firmware, Fujitsu M10-4s Firmware, Fujitsu M12-1 Firmware, Fujitsu M12-2 Firmware, Fujitsu M12-2s Firmware, Haxx Curl, Redhat Enterprise Linux Desktop, Redhat Enterprise Linux Server, Redhat Enterprise Linux Server Aus, Redhat Enterprise Linux Server Eus, Redhat Enterprise Linux Workstation.

## How do I fix CVE-2018-1000007?

Upgrade to a fixed version.

## Is CVE-2018-1000007 being exploited?

There is no known exploitation of CVE-2018-1000007 in the wild and no public exploit code.

## 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-2018-1000007 and fix it if it is affected.

What it is: CVE-2018-1000007 is a critical vulnerability in Canonical Ubuntu Linux, published on 24 Jan 2018. 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-2018-1000007 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-2018-1000007/ (Markdown: https://insights.sbomify.com/CVE-2018-1000007/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2018-1000007
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2018-1000007
- OSV: https://osv.dev/vulnerability/CVE-2018-1000007

---
From sbomify Insights: https://insights.sbomify.com/CVE-2018-1000007/
Summaries are generated and may contain mistakes; the official description above is the record.