---
title: "CVE-2017-9209\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-2017-9209?format=md
keywords: index, follow
---

# CVE-2017-9209

Publication date 23 May 2017

Last updated 25 August 2025

---

Ubuntu priority

**Negligible**

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

## Cvss 3 Severity Score

**5.5 · Medium**

[Score breakdown](https://ubuntu.com/security/CVE-2017-9209?format=md#impact-score)

Toggle side navigation

## Description

libqpdf.a in QPDF 6.0.0 allows remote attackers to cause a denial of
service (infinite recursion and stack consumption) via a crafted PDF
document, related to QPDFObjectHandle::parseInternal, aka
qpdf-infiniteloop2.

[Read the notes from the security team](https://ubuntu.com/security/CVE-2017-9209?format=md#notes)

## Status

Show unmaintained releases

| Package | Ubuntu Release | Status |
| --- | --- | --- |
| qpdf | 18.04 LTS bionic | Not affected |
| 17.10 artful | Not affected |
| 17.04 zesty | Ignored end of life |
| 16.04 LTS xenial | Fixed 8.0.2-3~16.04.1 |
| 14.04 LTS trusty | Fixed 8.0.2-3~14.04.1 |

---

* [How can I get the fixes?](https://ubuntu.com/security/cves/about#security)
* [What do statuses mean?](https://ubuntu.com/security/cves/about#statuses)
* [Patch details](https://ubuntu.com/security/CVE-2017-9209?format=md#patch-details)

## Notes

---

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

this patch breaks ABI

### Patch details

For informational purposes only. We recommend not to cherry-pick updates. [How can I get the fixes?](https://ubuntu.com/security/cves/about#security)

| Package | Patch details |
| --- | --- |
| qpdf | * Upstream:   [315092d](https://github.com/qpdf/qpdf/commit/315092dd98d5230ef0efa18b294d464d0e9f79d0) |

## Severity score breakdown

CVSS version:
CVSS v3.0

**Base score**

5.5 · Medium

* Base metrics

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

  | Parameter | Value |
  | --- | --- |
  | Base score | 5.5 · Medium |
  | Exploitability score | - |
  | Impact score | - |

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

## References

* [MITRE](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-9209)
* [NVD](https://nvd.nist.gov/vuln/detail/CVE-2017-9209)
* [Launchpad](https://launchpad.net/bugs/cve/CVE-2017-9209)
* [Debian](https://security-tracker.debian.org/tracker/CVE-2017-9209)

### Related Ubuntu Security Notices (USN)

+ [USN-3638-1](https://usn.ubuntu.com/USN-3638-1)
+ QPDF vulnerabilities
+ 7 May 2018

### Other references

* <http://www.openwall.com/lists/oss-security/2017/05/23/10>
* <https://blogs.gentoo.org/ago/2017/05/21/qpdf-three-infinite-loop-in-libqpdf/>
* <https://www.cve.org/CVERecord?id=CVE-2017-9209>