CVE-2011-2692

La función png_handle_sCAL de pngrutil.c en libpng v1.0.x antes de la v1.0.55, en v1.2.x antes de la v1.2.45, en v1.4.x antes de la v1.4.8, y en v1.5.x antes de la v1.5.4, no controla correctamente fragmentos inválidos SCAL, que permiten a atacantes remotos causar una denegación de servicio (corrupción de memoria y caída de aplicación) o posiblemente tener un impacto no especificado a través de una imagen PNG creada que provoca la lectura de la memoria sin inicializar.

OS X Lion v10.7.4 and Security Update 2012-002 is now available and addresses multiple security issues. An issue existed in the handling of network account logins. The login process recorded sensitive information in the system log, where other users of the system could read it. A temporary file race condition issue existed in blued's initialization routine. There are known attacks on the confidentiality of SSL 3.0 and TLS 1.0 when a cipher suite uses a block cipher in CBC mode. curl disabled the 'empty fragment' countermeasure which prevented these attacks. This issue is addressed by enabling empty fragments. A data injection issue existed in curl's handling of URLs. This issue is addressed through improved validation of URLs. This issue does not affect systems prior to OS X Lion. Various other vulnerabilities have been addressed.