En adición al lanzamiento de la nueva versión del sistema operativo Panther (MacoSX 10.3.5), Apple ha lanzado un parche de seguridad que soluciona los problemas con la librería PNG.
La actualización, que soluciona los siguientes problemas:
Mac OS X 10.3.5
· libpng (Portable Network Graphics) Fixes CAN-2002-1363, CAN-2004-0421, CAN-2004-0597, CAN-2004-0598, CAN-2004-0599
Impact: Malicious PNG images can cause application crashes and could execute arbitrary code
Description: A number of buffer overflows, null pointer dereferences and integer overflows have been discovered in the reference library for reading and writing PNG images. These vulnerabilities have been corrected in libpng which is used by the CoreGraphics and AppKit frameworks in Mac OS X. After installing this update, applications that use the PNG image format via these frameworks will be protected against these flaws.
· Safari: Fixes CAN-2004-0743
Impact: In a special situation, navigation using the forward/backward buttons can re-send form data to a GET url.
Description: This is for a situation where a web form is sent to a server using a POST method which issues an HTTP redirect to a GET method url. Using the forward/backward buttons will cause Safari to re-POST the form data to the GET url. Safari has been modified so that in this situation forward/backward navigation will result in only a GET method.
· TCP/IP Networking: Fixes CAN-2004-0744
Impact: Maliciously crafted IP fragments can use too many system resources preventing normal network operation.
Description: The “Rose Attack” describes a specially constructed sequence of IP fragments designed to consume system resources. The TCP/IP implementation has been modified to limit the resources consumed and prevents this denial of service attack.
Security Update 2004-08-09 (Mac OS X 10.3.4 and Mac OS X 10.2.8)
· libpng (Portable Network Graphics) Fixes CAN-2002-1363, CAN-2004-0421, CAN-2004-0597, CAN-2004-0598, CAN-2004-0599
Impact: Malicious PNG images can cause application crashes and could execute arbitrary code
Description: A number of buffer overflows, null pointer dereferences and integer overflows have been discovered in the reference library for reading and writing PNG images. These vulnerabilities have been corrected in libpng which is used by the CoreGraphics and AppKit frameworks in Mac OS X. After installing this update, applications that use the PNG image format via these frameworks will be protected against these flaws.
El parche está disponible a través de actualización de software y ocupa 5,2 mb.
