HTTP: LibPNG Transparency Chunk Length Buffer Overflow
This signature detects attempts to exploit a known vulnerability in the way libpng handles the transparency chunk of a PNG image. A successful attack could allow the attacker to execute arbitrary code on the targeted system. Failed exploit attempts could result in a denial of service condition.
Extended Description
Multiple buffer overflows in libpng 1.2.5 and earlier, as used in multiple products, allow remote attackers to execute arbitrary code via malformed PNG images in which (1) the png_handle_tRNS function does not properly validate the length of transparency chunk (tRNS) data, or the (2) png_handle_sBIT or (3) png_handle_hIST functions do not perform sufficient bounds checking.
Affected Products
Microsoft windows_98se
Short Name
HTTP:STC:DL:LIBPNG-TRAN-CHLT-BO
Severity
Major
Recommended
False
Recommended Action
Drop
Category
HTTP
Keywords
Buffer CVE-2004-0597 Chunk Length LibPNG Overflow Transparency bid:10857
Release Date
12/12/2012
Supported Platforms
srx-branch-12.3
srx-19.3
srx-branch-19.3
vsrx3bsd-19.2
srx-branch-19.4
vsrx-19.4
mx-12.3
mx-19.4
vmx-19.4
mx-19.3
vsrx3bsd-19.4
srx-19.4
vsrx-12.3
vmx-19.3
vsrx-19.2
srx-12.3
Sigpack Version
3761
False Positive
Unknown
Vendors
Microsoft
Greg_roelofs
CVSS Score
10.0