---
title: "CVE-2010-0421\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-2010-0421?format=md
keywords: index, follow
---

# CVE-2010-0421

Publication date 18 March 2010

Last updated 24 July 2024

---

Ubuntu priority

**Low**

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

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## Description

Array index error in the hb\_ot\_layout\_build\_glyph\_classes function in
pango/opentype/hb-ot-layout.cc in Pango before 1.27.1 allows
context-dependent attackers to cause a denial of service (application
crash) via a crafted font file, related to building a synthetic Glyph
Definition (aka GDEF) table by using this font's charmap and the Unicode
property database.

[Read the notes from the security team](https://ubuntu.com/security/CVE-2010-0421?format=md#notes)

## Status

Show unmaintained releases

| Package | Ubuntu Release | Status |
| --- | --- | --- |
| pango1.0 | 10.10 maverick | Not affected |
| 10.04 LTS lucid | Not affected |
| 9.10 karmic | Fixed 1.26.0-1ubuntu0.1 |
| 9.04 jaunty | Ignored end of life |
| 8.10 intrepid | Ignored end of life, was needed |
| 8.04 LTS hardy | Fixed 1.20.5-0ubuntu1.2 |
| 6.06 LTS dapper | Ignored end of life |

---

* [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-2010-0421?format=md#patch-details)

## Notes

---

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

debian patch is different, backport?

### 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 |
| --- | --- |
| pango1.0 | * Upstream:   [?id=797](http://git.gnome.org/browse/pango/commit/?id=797d46714d27f147277fdd5346648d838c68fb8c) * Vendor:   <http://bugs.debian.org/cgi-bin/bugreport.cgi?msg=10;filename=pango1.0_1.20.5-5%2Blenny1.debdiff;att=1;bug=574021> |

## References

* [MITRE](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2010-0421)
* [NVD](https://nvd.nist.gov/vuln/detail/CVE-2010-0421)
* [Launchpad](https://launchpad.net/bugs/cve/CVE-2010-0421)
* [Debian](https://security-tracker.debian.org/tracker/CVE-2010-0421)

### Related Ubuntu Security Notices (USN)

+ [USN-1082-1](https://usn.ubuntu.com/USN-1082-1)
+ Pango vulnerabilities
+ 2 March 2011

### Other references

* <https://www.cve.org/CVERecord?id=CVE-2010-0421>