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.
*CVSS:
| Base Score: | 3.5 |
| Access Vector: | Remote |
| Access Complexity: | Low |
| Authentication: | Not Required |
| Confidentiality Impact: | None |
| Integrity Impact: | None |
| Availability Impact: | Partial |
| Temporal Score: | 2.6 |
| Exploitability: | Unproven |
| Remediation Level: | Official-Fix |
| Report Confidence: | Confirmed |
Consequences:
Denial of Service
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.
References:
- libpng Web site: libpng Home Page.
- Red Hat Bugzilla Bug 179455: CVE-2006-0481 libpng heap based buffer overflow.
- 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
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
Reported:
Feb 01, 2006
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The information within this database may change without notice. Use of this information constitutes acceptance for use in an AS IS condition. There are NO warranties, implied or otherwise, with regard to this information or its use. Any use of this information is at the user's risk. In no event shall IBM be held liable for any damages whatsoever arising out of or in connection with the use or spread of this information.