---
title: "CVE-2015-5523\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-2015-5523?format=md
keywords: index, follow
---

# CVE-2015-5523

Publication date 16 July 2015

Last updated 24 July 2024

---

Ubuntu priority

**Low**

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

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## Description

The ParseValue function in lexer.c in tidy before 4.9.31 allows remote
attackers to cause a denial of service (crash) via vectors involving
multiple whitespace characters before an empty href, which triggers a large
memory allocation.

[Read the notes from the security team](https://ubuntu.com/security/CVE-2015-5523?format=md#notes)

## Status

Show unmaintained releases

| Package | Ubuntu Release | Status |
| --- | --- | --- |
| tidy | 15.04 vivid | Fixed 20091223cvs-1.4ubuntu0.1 |
| 14.10 utopic | Ignored end of life |
| 14.04 LTS trusty | Fixed 20091223cvs-1.2ubuntu1.1 |
| 12.04 LTS precise | Fixed 20091223cvs-1ubuntu2.1 |

---

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

## Notes

---

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

same fix as CVE-2015-5522

## References

* [MITRE](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2015-5523)
* [NVD](https://nvd.nist.gov/vuln/detail/CVE-2015-5523)
* [Launchpad](https://launchpad.net/bugs/cve/CVE-2015-5523)
* [Debian](https://security-tracker.debian.org/tracker/CVE-2015-5523)

### Related Ubuntu Security Notices (USN)

+ [USN-2695-1](https://usn.ubuntu.com/USN-2695-1)
+ HTML Tidy vulnerabilities
+ 29 July 2015

### Other references

* <http://www.openwall.com/lists/oss-security/2015/06/04/2>
* <https://www.cve.org/CVERecord?id=CVE-2015-5523>