USN-730-1: libpng vulnerabilities

Releases

• Ubuntu 8.10
• Ubuntu 8.04
• Ubuntu 7.10
• Ubuntu 6.06

Packages

• libpng -

Details

It was discovered that libpng did not properly perform bounds checking in
certain operations. An attacker could send a specially crafted PNG image and
cause a denial of service in applications linked against libpng. This issue
only affected Ubuntu 8.04 LTS. (CVE-2007-5268, CVE-2007-5269)

Tavis Ormandy discovered that libpng did not properly initialize memory. If a
user or automated system were tricked into opening a crafted PNG image, an
attacker could cause a denial of service via application crash, or possibly
execute arbitrary code with the privileges of the user invoking the program.
This issue did not affect Ubuntu 8.10. (CVE-2008-1382)

Harald van Dijk discovered an off-by-one error in libpng. An attacker could
could cause an application crash in programs using pngtest. (CVE-2008-3964)

It was discovered that libpng did not properly NULL terminate a keyword
string. An attacker could exploit this to set arbitrary memory locations to
zero. (CVE-2008-5907)

Glenn Randers-Pehrson discovered that libpng did not properly initialize
pointers. If a user or automated system were tricked into opening a crafted PNG
file, an attacker could cause a denial of service or possibly execute arbitrary
code with the privileges of the user invoking the program. (CVE-2009-0040)

Update instructions

The problem can be corrected by updating your system to the following package versions:

Ubuntu 8.10

• libpng12-0 - 1.2.27-1ubuntu0.1

Ubuntu 8.04

• libpng12-0 - 1.2.15~beta5-3ubuntu0.1

Ubuntu 7.10

• libpng12-0 - 1.2.15~beta5-2ubuntu0.2

Ubuntu 6.06

• libpng12-0 - 1.2.8rel-5ubuntu0.4

After a standard system upgrade you need to reboot your computer to
effect the necessary changes.

References

• CVE-2008-5907
• CVE-2008-3964
• CVE-2008-1382
• CVE-2007-5268
• CVE-2007-5269
• CVE-2009-0040

Related notices

• USN-538-1
• USN-728-1