# CVE-2018-2451: Auth bypass in SAP HANA Extended Application Services

> Attackers can reuse expired CLI session tokens to access resources after authorization revocation, requiring SAP HANA XS administrators to apply security patches.

- **Severity:** Medium 6.6 (`CVSS:3.0/AV:N/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** An administrator
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 14 Aug 2018
- **Updated:** 5 Aug 2024
- **Also known as:** GHSA-w5mg-8gpq-pmwq

## What is CVE-2018-2451?

CVE-2018-2451 is a medium-severity authentication bypass vulnerability in SAP HANA Extended Application Services, published on 14 Aug 2018. An attacker needs administrator access to exploit it, with no action from the victim.

### Official description

XS Command-Line Interface (CLI) user sessions with the SAP HANA Extended Application Services (XS), version 1, advanced server may have an unintentional prolonged period of validity. Consequently, a platform user could access controller resources via active CLI session even after corresponding authorizations have been revoked meanwhile by an administrator user. Similarly, an attacker who managed to gain access to the platform user's session might misuse the session token even after the session has been closed.

Weakness: CWE-613 (DEPRECATED: Insufficient Session Expiration)

## Which versions are affected by CVE-2018-2451?

It affects 1 product.


Products: Sap Hana Extended Application Services.

## How do I fix CVE-2018-2451?

No fix has been published for CVE-2018-2451 yet. Limit exposure of the affected software until one is available.

## Is CVE-2018-2451 being exploited?

There is no known exploitation of CVE-2018-2451 in the wild and no public exploit code.

## Other vulnerabilities in SAP HANA Extended Application Services

- [CVE-2015-1311](https://insights.sbomify.com/CVE-2015-1311/): Code injection in n/a (critical 10.0)
- [CVE-2018-2375](https://insights.sbomify.com/CVE-2018-2375/): Information disclosure in SAP HANA Extended Application Services (high 8.1)
- [CVE-2018-2376](https://insights.sbomify.com/CVE-2018-2376/): Information disclosure in SAP HANA Extended Application Services (high 8.1)
- [CVE-2019-0266](https://insights.sbomify.com/CVE-2019-0266/): Information disclosure in SAP HANA Extended Application Services, advanced model (XS advanced) (high 7.5)
- [CVE-2018-2373](https://insights.sbomify.com/CVE-2018-2373/): SQL injection in SAP HANA Extended Application Services (high 7.5)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2018-2451 and fix it if it is affected.

What it is: CVE-2018-2451 is a medium-severity authentication bypass vulnerability in SAP HANA Extended Application Services, published on 14 Aug 2018. An attacker needs administrator access to exploit it, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2018-2451 in the wild and no public exploit code.

Affected product: SAP HANA Extended Application Services. 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-2018-2451/ (Markdown: https://insights.sbomify.com/CVE-2018-2451/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2018-2451
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2018-2451
- OSV: https://osv.dev/vulnerability/CVE-2018-2451

---
From sbomify Insights: https://insights.sbomify.com/CVE-2018-2451/
Summaries are generated and may contain mistakes; the official description above is the record.