Important: libXfont

Issue Overview:

An integer overflow flaw was found in the way libXfont processed certain Glyph Bitmap Distribution Format (BDF) fonts. A malicious, local user could use this flaw to crash the X.Org server or, potentially, execute arbitrary code with the privileges of the X.Org server. (CVE-2015-1802)

An integer truncation flaw was discovered in the way libXfont processed certain Glyph Bitmap Distribution Format (BDF) fonts. A malicious, local user could use this flaw to crash the X.Org server or, potentially, execute arbitrary code with the privileges of the X.Org server. (CVE-2015-1804)

A NULL pointer dereference flaw was discovered in the way libXfont processed certain Glyph Bitmap Distribution Format (BDF) fonts. A malicious, local user could use this flaw to crash the X.Org server. (CVE-2015-1803)

Affected Packages:

libXfont

Issue Correction:
Run yum update libXfont to update your system.

New Packages:

i686:  
    libXfont-debuginfo-1.4.5-5.12.amzn1.i686  
    libXfont-devel-1.4.5-5.12.amzn1.i686  
    libXfont-1.4.5-5.12.amzn1.i686  
  
src:  
    libXfont-1.4.5-5.12.amzn1.src  
  
x86_64:  
    libXfont-devel-1.4.5-5.12.amzn1.x86_64  
    libXfont-1.4.5-5.12.amzn1.x86_64  
    libXfont-debuginfo-1.4.5-5.12.amzn1.x86_64  

Additional References

Red Hat: CVE-2015-1802, CVE-2015-1803, CVE-2015-1804

Mitre: CVE-2015-1802, CVE-2015-1803, CVE-2015-1804