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Security Advisory Updated libpng packages fix crash

Advisory: RHSA-2004:181-03
Type: Security Advisory
Severity: N/A
Issued on: 2004-04-30
Last updated on: 2004-04-30
Affected Products: Red Hat Linux 9
CVEs ( CVE-2004-0421


Updated libpng packages that fix a out of bounds memory access are now

The libpng package contains a library of functions for creating and
manipulating PNG (Portable Network Graphics) image format files.

Steve Grubb discovered a out of bounds memory access flaw in libpng. An
attacker could carefully craft a PNG file in such a way that it would cause
an application linked to libpng to crash when opened by a victim. This
issue may not be used to execute arbitrary code.

Users are advised to upgrade to these updated packages that contain a
backported security fix not vulnerable to this issue.


Before applying this update, make sure all previously released errata
relevant to your system have been applied.

To update all RPMs for your particular architecture, run:

rpm -Fvh [filenames]

where [filenames] is a list of the RPMs you wish to upgrade. Only those
RPMs which are currently installed will be updated. Those RPMs which are
not installed but included in the list will not be updated. Note that you
can also use wildcards (*.rpm) if your current directory *only* contains the
desired RPMs.

Please note that this update is also available via Red Hat Network. Many
people find this an easier way to apply updates. To use Red Hat Network,
launch the Red Hat Update Agent with the following command:


This will start an interactive process that will result in the appropriate
RPMs being upgraded on your system.

If up2date fails to connect to Red Hat Network due to SSL
Certificate Errors, you need to install a version of the
up2date client with an updated certificate. The latest version of
up2date is available from the Red Hat FTP site and may also be
downloaded directly from the RHN website:

Updated packages

Red Hat Linux 9

Missing file
    MD5: e45674dfbfc641bae05438da90bc5cb8
Missing file
    MD5: 591b1c8a152e1dcac63b82640ffa14e0
Missing file
    MD5: 3f1c2ee426702c64e73ee453afb6216f
Missing file
    MD5: a08847d084032f99a1b33d3b5a9fba33
Missing file
    MD5: 800356c0126f967b9353279ebc8c321c
Missing file
    MD5: 505508162b208c95b5bd3e63e9cafbfd


These packages are GPG signed by Red Hat for security. Our key and details on how to verify the signature are available from:

The Red Hat security contact is More contact details at