Public Date:
678563: CVE-2011-0064 pango: missing memory reallocation failure checking in hb_buffer_ensure

The MITRE CVE dictionary describes this issue as:

The hb_buffer_ensure function in hb-buffer.c in HarfBuzz, as used in Pango 1.28.3, Firefox, and other products, does not verify that memory reallocations succeed, which allows remote attackers to cause a denial of service (NULL pointer dereference and application crash) or possibly execute arbitrary code via crafted OpenType font data that triggers use of an incorrect index.

Find out more about CVE-2011-0064 from the MITRE CVE dictionary dictionary and NIST NVD.


This issue did not affect the versions of qt shipped with Red Hat Enterprise Linux 4, 5 and 6.

CVSS v2 metrics

NOTE: The following CVSS v2 metrics and score provided are preliminary and subject to review.

Base Score 6.8
Base Metrics AV:N/AC:M/Au:N/C:P/I:P/A:P
Access Vector Network
Access Complexity Medium
Authentication None
Confidentiality Impact Partial
Integrity Impact Partial
Availability Impact Partial

Find out more about Red Hat support for the Common Vulnerability Scoring System (CVSS).

Red Hat Security Errata

Platform Errata Release Date
Red Hat Enterprise Linux version 6 (pango) RHSA-2011:0309 2011-03-01

Affected Packages State

Platform Package State
Red Hat Enterprise Linux 3 pango Not affected
Red Hat Enterprise Linux 4 evolution28-pango Not affected
Red Hat Enterprise Linux 5 pango Not affected
Red Hat Enterprise Linux 4 pango Not affected


Red Hat would like to thank Mozilla Security Team for reporting this issue.