---
title: "CVE-2017-12173\n    | Ubuntu"
description: Ubuntu is an open source software operating system that runs from the
  desktop, to the cloud, to all your internet connected things.
url: https://ubuntu.com/security/CVE-2017-12173?format=md
keywords: index, follow
---

# CVE-2017-12173

Publication date 5 October 2017

Last updated 25 August 2025

---

Ubuntu priority

**Medium**

[Why this priority?](https://ubuntu.com/security/cves/about#priority )

## Cvss 3 Severity Score

**8.8 · High**

[Score breakdown](https://ubuntu.com/security/CVE-2017-12173?format=md#impact-score)

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## Description

It was found that sssd's sysdb\_search\_user\_by\_upn\_res() function before
1.16.0 did not sanitize requests when querying its local cache and was
vulnerable to injection. In a centralized login environment, if a password
hash was locally cached for a given user, an authenticated attacker could
use this flaw to retrieve it.

[Read the notes from the security team](https://ubuntu.com/security/CVE-2017-12173?format=md#notes)

## Status

Show unmaintained releases

| Package | Ubuntu Release | Status |
| --- | --- | --- |
| sssd | 17.10 artful | Fixed 1.15.3-2ubuntu1 |
| 17.04 zesty | Fixed 1.15.2-1ubuntu1.1 |
| 16.04 LTS xenial | Fixed 1.13.4-1ubuntu1.10 |
| 14.04 LTS trusty | Not in release |

---

* [How can I get the fixes?](https://ubuntu.com/security/cves/about#security)
* [What do statuses mean?](https://ubuntu.com/security/cves/about#statuses)

## Notes

---

### [leosilva](https://launchpad.net/~leosilva)

according with RHEL "Versions prior to sssd-1.12.0 are
not affected (affected commit: 7ecb5ae)"

## Severity score breakdown

CVSS version:
CVSS v3.0

**Base score**

8.8 · High

* Base metrics

  | Parameter | Value |
  | --- | --- |
  | Attack vector | Network |
  | Attack complexity | Low |
  | Privileges required | Low |
  | User interaction | None |
  | Scope | Unchanged |
  | Confidentiality impact | High |
  | Integrity impact | High |
  | Availability impact | High |
* Scores

  | Parameter | Value |
  | --- | --- |
  | Base score | 8.8 · High |
  | Exploitability score | - |
  | Impact score | - |

**Vector:** CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

## References

* [MITRE](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-12173)
* [NVD](https://nvd.nist.gov/vuln/detail/CVE-2017-12173)
* [Launchpad](https://launchpad.net/bugs/cve/CVE-2017-12173)
* [Debian](https://security-tracker.debian.org/tracker/CVE-2017-12173)

### Related Ubuntu Security Notices (USN)

+ [USN-3526-1](https://usn.ubuntu.com/USN-3526-1)
+ SSSD vulnerability
+ 10 January 2018

### Other references

* <https://bugzilla.redhat.com/show_bug.cgi?id=1498173>
* <https://www.cve.org/CVERecord?id=CVE-2017-12173>