---
title: "CVE-2019-18197\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-2019-18197?format=md
keywords: index, follow
---

# CVE-2019-18197

Publication date 18 October 2019

Last updated 25 August 2025

---

Ubuntu priority

**Medium**

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

## Cvss 3 Severity Score

**7.5 · High**

[Score breakdown](https://ubuntu.com/security/CVE-2019-18197?format=md#impact-score)

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## Description

In xsltCopyText in transform.c in libxslt 1.1.33, a pointer variable isn't
reset under certain circumstances. If the relevant memory area happened to
be freed and reused in a certain way, a bounds check could fail and memory
outside a buffer could be written to, or uninitialized data could be
disclosed.

## Status

Show unmaintained releases

| Package | Ubuntu Release | Status |
| --- | --- | --- |
| libxslt | 19.10 eoan | Fixed 1.1.33-0ubuntu1.1 |
| 19.04 disco | Fixed 1.1.32-2ubuntu0.2 |
| 18.04 LTS bionic | Fixed 1.1.29-5ubuntu0.2 |
| 16.04 LTS xenial | Fixed 1.1.28-2.1ubuntu0.3 |
| 14.04 LTS trusty | Fixed 1.1.28-2ubuntu0.2+esm1  Ubuntu Pro |

---

* [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-2019-18197?format=md#patch-details)

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### 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 |
| --- | --- |
| libxslt | * Upstream:   [2232473](https://gitlab.gnome.org/GNOME/libxslt/commit/2232473733b7313d67de8836ea3b29eec6e8e285) |

## Severity score breakdown

CVSS version:
CVSS v3.0

**Base score**

7.5 · High

* Base metrics

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

  | Parameter | Value |
  | --- | --- |
  | Base score | 7.5 · High |
  | Exploitability score | - |
  | Impact score | - |

**Vector:** CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H

## References

* [MITRE](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-18197)
* [NVD](https://nvd.nist.gov/vuln/detail/CVE-2019-18197)
* [Launchpad](https://launchpad.net/bugs/cve/CVE-2019-18197)
* [Debian](https://security-tracker.debian.org/tracker/CVE-2019-18197)

### Related Ubuntu Security Notices (USN)

+ [USN-4164-1](https://usn.ubuntu.com/USN-4164-1)
+ Libxslt vulnerabilities
+ 22 October 2019

### Other references

* <https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=15746>
* <https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=15768>
* <https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=15914>
* <https://www.cve.org/CVERecord?id=CVE-2019-18197>