# CVE-2011-1758: Auth bypass in n/a

> Local users can bypass Kerberos authentication in SSSD by exploiting a pathname-as-password flaw when specific features are enabled.

- **Severity:** Low 3.7 (`AV:L/AC:H/Au:N/C:P/I:P/A:P`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Local or same network only
- **Victim action needed:** Not needed
- **Fix available:** Yes
- **Published:** 26 May 2011
- **Updated:** 6 Aug 2024
- **Also known as:** GHSA-rqv8-76v6-fcx2

## What is CVE-2011-1758?

CVE-2011-1758 is a low-severity authentication bypass vulnerability in n/a, published on 26 May 2011. It can only be exploited from the same machine or local network, with no action from the victim.

### Official description

The krb5_save_ccname_done function in providers/krb5/krb5_auth.c in System Security Services Daemon (SSSD) 1.5.x before 1.5.7, when automatic ticket renewal and offline authentication are configured, uses a pathname string as a password, which allows local users to bypass Kerberos authentication by listing the /tmp directory to obtain the pathname.

Weakness: CWE-287 (Improper Authentication)

## Which versions are affected by CVE-2011-1758?

It affects 1 product.


Products: Fedoraproject Sssd.

## How do I fix CVE-2011-1758?

Upgrade to a fixed version.

## Is CVE-2011-1758 being exploited?

There is no known exploitation of CVE-2011-1758 in the wild and no public exploit code.

## Other vulnerabilities in n/a

- [CVE-2022-4254](https://insights.sbomify.com/CVE-2022-4254/): Other in SSSD (high 8.8)
- [CVE-2012-3462](https://insights.sbomify.com/CVE-2012-3462/): Auth bypass in sssd (high 8.8)
- [CVE-2026-104048](https://insights.sbomify.com/CVE-2026-104048/): Sssd: sssd: authorization bypass via cross-domain username collision in hbac evaluation (medium 6.8)
- [CVE-2015-5292](https://insights.sbomify.com/CVE-2015-5292/): Denial of service in n/a (medium 6.8)
- [CVE-2026-12610](https://insights.sbomify.com/CVE-2026-12610/): Sssd: use-after-free crash in sssd' 'sssd_pam' process (medium 6.4)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2011-1758 and fix it if it is affected.

What it is: CVE-2011-1758 is a low-severity authentication bypass vulnerability in n/a, published on 26 May 2011. It can only be exploited from the same machine or local network, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2011-1758 in the wild and no public exploit code.

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-2011-1758/ (Markdown: https://insights.sbomify.com/CVE-2011-1758/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2011-1758
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2011-1758
- OSV: https://osv.dev/vulnerability/CVE-2011-1758

---
From sbomify Insights: https://insights.sbomify.com/CVE-2011-1758/
Summaries are generated and may contain mistakes; the official description above is the record.