libpng png_set_strip_alpha() buffer overflow
| libpng-pngsetstripalpha-bo (24396) |  Low Risk |
Description:
libpng is vulnerable to a heap-based buffer overflow, caused by improper bounds checking by the png_set_strip_alpha() function. By sending a PNG image containing alpha channels, a remote attacker could overflow a buffer and cause the application to crash.
Platforms Affected:
- Gentoo, Linux
- libpng, libpng 1.0.16
- libpng, libpng 1.0.17
- libpng, libpng 1.2.6
- libpng, libpng 1.2.7
- RedHat, Enterprise Linux 4 ES
- RedHat, Enterprise Linux 4 WS
- RedHat, Enterprise Linux 4 Desktop
- RedHat, Enterprise Linux 4 AS
Remedy:
Upgrade to the latest version of libpng (1.0.18, 1.2.8 or later), available from the libpng Web site. See References.
For Red Hat Linux:
Refer to RHSA-2006:0205-4 for patch, upgrade, or suggested workaround information. See References.
Consequences:
Denial of Service
References:
- libpng Web site, libpng Home Page at http://www.libpng.org/pub/png/libpng.html.
- Red Hat Bugzilla Bug 179455, CVE-2006-0481 libpng heap based buffer overflow at https://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=179455.
- BID-16626: Libpng Graphics Library PNG_Set_Strip_Alpha Buffer Overflow Vulnerability
- CVE-2006-0481: Heap-based buffer overflow in the alpha strip capability in libpng 1.2.7 allows context-dependent attackers to cause a denial of service (crash) when the png_do_strip_filler function is used to strip alpha channels out of the image.
- GLSA-200812-15: POV-Ray: User-assisted execution of arbitrary code
- RHSA-2006-0205: libpng security update
- SA18654: libpng "png_set_strip_alpha()" Buffer Overflow Vulnerability
- SECTRACK ID: 1015615: libpng Buffer Overflow in png_set_strip_alpha() Lets Users Deny Service
- SECTRACK ID: 1015617: (Red Hat Issues Fix) libpng Buffer Overflow in png_set_strip_alpha() Lets Users Deny Service
- VUPEN/ADV-2006-0393: Libpng png_do_strip_filler Initialization Buffer Overflow Vulnerability
Reported:
Feb 01, 2006
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