# CVE-2023-26258: Auth bypass in n/a

> An attacker can bypass authentication by leaking an AuthUUID token to gain administrator privileges and execute arbitrary tasks.

- **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:** No
- **Published:** 3 Jul 2023
- **Updated:** 25 Nov 2024
- **Also known as:** GHSA-wvxg-vj6j-j677

## What is CVE-2023-26258?

CVE-2023-26258 is a critical authentication bypass vulnerability in n/a, published on 3 Jul 2023. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

Arcserve UDP through 9.0.6034 allows authentication bypass. The method getVersionInfo at WebServiceImpl/services/FlashServiceImpl leaks the AuthUUID token. This token can be used at /WebServiceImpl/services/VirtualStandbyServiceImpl to obtain a valid session. This session can be used to execute any task as administrator.

Weakness: CWE-863 (Incorrect Authorization)

## Which versions are affected by CVE-2023-26258?

It affects 1 product.


Products: Arcserve Udp.

## How do I fix CVE-2023-26258?

No fix has been published for CVE-2023-26258 yet. Limit exposure of the affected software until one is available.

## Is CVE-2023-26258 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2023-26258 exists.

Public exploit code:

- Arcserve UDP <= 9.0.6034 - Authentication Bypass (nuclei): http/cves/2023/CVE-2023-26258.yaml

## Other vulnerabilities in n/a

- [CVE-2015-4068](https://insights.sbomify.com/CVE-2015-4068/): Arcserve Unified Data Protection (UDP) Directory Traversal (critical 9.1, exploited in the wild)
- [CVE-2024-0799](https://insights.sbomify.com/CVE-2024-0799/): Authentication Bypass via wizardLogin in Arcserve Unified Data Protection (critical 9.8)
- [CVE-2023-41998](https://insights.sbomify.com/CVE-2023-41998/): Arcserve UDP Unauthenticated RCE (critical 9.8)
- [CVE-2023-41999](https://insights.sbomify.com/CVE-2023-41999/): Arcserve UDP Management Authentication Bypass (critical 9.8)
- [CVE-2023-42000](https://insights.sbomify.com/CVE-2023-42000/): Arcserve UDP Agent Unauthenticated Path Traversal File Upload (critical 9.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2023-26258 and fix it if it is affected.

What it is: CVE-2023-26258 is a critical authentication bypass vulnerability in n/a, published on 3 Jul 2023. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2023-26258 exists.

Affected product: n/a. 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-2023-26258/ (Markdown: https://insights.sbomify.com/CVE-2023-26258/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2023-26258
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2023-26258
- OSV: https://osv.dev/vulnerability/CVE-2023-26258

---
From sbomify Insights: https://insights.sbomify.com/CVE-2023-26258/
Summaries are generated and may contain mistakes; the official description above is the record.