Pango pango_ft2_font_render_box_glyph() buffre overflow

pango-pango-bo (64832) The risk level is classified as HighHigh Risk

Description:

Pango is vulnerable to a heap-based buffer overflow, caused by improper bounds checking by the pango_ft2_font_render_box_glyph() function. By persuading a victim to load a specially-crafted font file using Pango's FreeType2 backend, a remote attacker could overflow a buffer and execute arbitrary code on the system or cause the application to crash.

*CVSS:

Base Score: 6.8
  Access Vector: Network
  Access Complexity: Medium
  Authentication: None
  Confidentiality Impact: Partial
  Integrity Impact: Partial
  Availability Impact: Partial
 
Temporal Score: 5.3
  Exploitability: Proof-of-Concept
  Remediation Level: Official-Fix
  Report Confidence: Confirmed

Consequences:

Gain Access

Remedy:

Apply the appropriate patch for your system. See References.

References:

  • Bug #696616 in pango1.0 (Ubuntu): Heap corruption in font parsing with FreeType2 backend.
  • Pango Web site: Pango.
  • Sun Product Security Blog, Sep 16, 2011: CVE-2011-0020 Buffer Overflow Vulnerability in Pango library.
  • BID-45842: Pango Font Parsing 'pangoft2-render.c' Heap Corruption Vulnerability
  • CVE-2011-0020: Heap-based buffer overflow in the pango_ft2_font_render_box_glyph function in pango/pangoft2-render.c in libpango in Pango 1.28.3 and earlier, when the FreeType2 backend is enabled, allows user-assisted remote attackers to cause a denial of service (application crash) or possibly execute arbitrary code via a crafted font file, related to the glyph box for an FT_Bitmap object.
  • OSVDB ID: 70596: Pango pango/pangoft2-render.c pango_ft2_font_render_box_glyph() Function Overflow DoS
  • RHSA-2011-0180: Moderate: pango security update
  • SA42934: Pango pango_ft2_font_render_box_glyph() Buffer Overflow Vulnerability
  • SA46076: Oracle Solaris Pango "pango_ft2_font_render_box_glyph()" Buffer Overflow Vulnerability
  • SUSE-SR:2011:005: SUSE Security Summary Report

Platforms Affected:

  • Oracle Solaris 11 Express
  • Pango Pango 1.28.3
  • RedHat Enterprise Linux 4 AS
  • RedHat Enterprise Linux 4 Desktop
  • RedHat Enterprise Linux 4 ES
  • RedHat Enterprise Linux 4 WS
  • RedHat Enterprise Linux 4.8.z AS
  • RedHat Enterprise Linux 4.8.z ES
  • RedHat Enterprise Linux 5 Client
  • RedHat Enterprise Linux 5 Client Workstation
  • RedHat Enterprise Linux 5
  • RedHat Enterprise Linux 6 Server
  • RedHat Enterprise Linux 6 Workstation
  • RedHat Enterprise Linux Desktop 6
  • RedHat Enterprise Linux EUS 5.6.z
  • RedHat Enterprise Linux HPC Node 6
  • RedHat Enterprise Linux Long Life 5.6
  • RedHat Enterprise Linux Server EUS 6.0.z

Reported:

Jan 02, 2011

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