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CVSS: 5.0EPSS: 0%CPEs: 4EXPL: 0

The png_check_keyword function in pngwutil.c in libpng before 1.0.42, and 1.2.x before 1.2.34, might allow context-dependent attackers to set the value of an arbitrary memory location to zero via vectors involving creation of crafted PNG files with keywords, related to an implicit cast of the '\0' character constant to a NULL pointer. NOTE: some sources incorrectly report this as a double free vulnerability. La funcion png_check_keyword en pngwutil.c en libpng anteriores a v1.0.42, v1.2.x anterior a v1.2.34, permitiría atacantes dependientes de contexto poner a cero el valor de una localización de memoria de su elección a través de vectores relacionados con la creación de ficheros PNG con palabras clave, relacionado con la asignación del valor '\0' a un puntero NULL. NOTA: Algunas fuentes informan incorrectamente que se trata de una vulnerabilidad de doble liberación. • http://libpng.sourceforge.net/index.html http://lists.opensuse.org/opensuse-security-announce/2009-02/msg00000.html http://openwall.com/lists/oss-security/2009/01/09/1 http://secunia.com/advisories/34320 http://secunia.com/advisories/34388 http://security.gentoo.org/glsa/glsa-200903-28.xml http://sourceforge.net/mailarchive/forum.php?thread_name=4B6F0239C13D0245820603C036D180BC79FBAA%40CABOTUKEXCH01.cabot.local&forum_name=png-mng-implement http://www.debian.org/security/2009/dsa-1750 http://www&# •

CVSS: 4.3EPSS: 0%CPEs: 34EXPL: 1

Multiple off-by-one errors in libpng before 1.2.32beta01, and 1.4 before 1.4.0beta34, allow context-dependent attackers to cause a denial of service (crash) or have unspecified other impact via a PNG image with crafted zTXt chunks, related to (1) the png_push_read_zTXt function in pngread.c, and possibly related to (2) pngtest.c. Múltiples desbordamientos de entero en libpng versiones anteriores a 1.2.32beta01, y 1.4 versiones anteriores a 1.4.0beta34, permiten a atacantes dependientes de contexto provocar una denegación de servicio (caída) o tener otros impactos desconocidos a través de una imagen PNG con fragmentos zTXt manipulados, relacionado con (1) la función png_push_read_zTXt en pngread.c, y posiblemente relacionado con (2) pngtest.c. • http://secunia.com/advisories/31781 http://secunia.com/advisories/33137 http://secunia.com/advisories/35302 http://secunia.com/advisories/35386 http://security.gentoo.org/glsa/glsa-200812-15.xml http://sourceforge.net/mailarchive/forum.php?thread_name=e56ccc8f0809180317u6a5306fg14683947affb3e1b%40mail.gmail.com&forum_name=png-mng-implement http://sourceforge.net/project/shownotes.php?group_id=5624&release_id=624517 http://sourceforge.net/project/shownotes.php?release_id=624518 http://sourceforge.net/tracker& • CWE-193: Off-by-one Error •

CVSS: 5.0EPSS: 30%CPEs: 2EXPL: 0

Certain chunk handlers in libpng before 1.0.29 and 1.2.x before 1.2.21 allow remote attackers to cause a denial of service (crash) via crafted (1) pCAL (png_handle_pCAL), (2) sCAL (png_handle_sCAL), (3) tEXt (png_push_read_tEXt), (4) iTXt (png_handle_iTXt), and (5) ztXT (png_handle_ztXt) chunking in PNG images, which trigger out-of-bounds read operations. Determinados manejadores de fragmentos en libpng anterior a 1.0.29 y 1.2.x anterior a 1.2.21 permiten a atacantes remotos provocar una denegación de servicio (caída) mediante fragmentación manipulada (1) pCAL (png_handle_pCAL), (2) sCAL (png_handle_sCAL), (3) tEXt (png_push_read_tEXt), (4) iTXt (png_handle_iTXt), y (5) ztXT (png_handle_ztXt) en imágenes PNG, lo cual dispara operaciones de lectura fuera de límite. • http://android-developers.blogspot.com/2008/03/android-sdk-update-m5-rc15-released.html http://bugs.gentoo.org/show_bug.cgi?id=195261 http://docs.info.apple.com/article.html?artnum=307562 http://lists.apple.com/archives/security-announce/2008//May/msg00001.html http://lists.apple.com/archives/security-announce/2008/Mar/msg00001.html http://lists.grok.org.uk/pipermail/full-disclosure/2008-August/064118.html http://lists.vmware.com/pipermail/security-announce/2008/000008.html http:/ • CWE-20: Improper Input Validation CWE-125: Out-of-bounds Read •

CVSS: 4.3EPSS: 6%CPEs: 1EXPL: 0

Off-by-one error in ICC profile chunk handling in the png_set_iCCP function in pngset.c in libpng before 1.2.22 beta1 allows remote attackers to cause a denial of service (crash) via a crafted PNG image, due to an incorrect fix for CVE-2007-5266. Error de superación de límite (off-by-one) en el manejo de perfiles ICC en la función png_set_iCCP de pngset.c en libpng anterior a 1.2.22 beta1 permite a atacantes remotos provocar una denegación de servicio (caída) mediante una imagen PNG manipulada artesanalmente, debido a un parche incorrecto para CVE-2007-5266. • http://android-developers.blogspot.com/2008/03/android-sdk-update-m5-rc15-released.html http://docs.info.apple.com/article.html?artnum=307562 http://lists.apple.com/archives/security-announce/2008/Mar/msg00001.html http://secunia.com/advisories/27130 http://secunia.com/advisories/27284 http://secunia.com/advisories/27746 http://secunia.com/advisories/29420 http://secunia.com/advisories/35302 http://secunia.com/advisories/35386 http://slackware.com/security/viewer.php?l=slackware-secur • CWE-189: Numeric Errors •

CVSS: 4.3EPSS: 2%CPEs: 6EXPL: 0

pngrtran.c in libpng before 1.0.29 and 1.2.x before 1.2.21 use (1) logical instead of bitwise operations and (2) incorrect comparisons, which might allow remote attackers to cause a denial of service (crash) via a crafted PNG image. pngrtran.c en libpng anterior a 1.0.29 y 1.2.x anterior a 1.2.21 utiliza (1) operaciones lógicas en vez de operación sobre bits y (2) comparaciones incorrectas, lo cual podría permitir a atacantes remotos provocar una denegación de servicio (caída) mediante una imagen PNG manipulada artesanalmente. • http://android-developers.blogspot.com/2008/03/android-sdk-update-m5-rc15-released.html http://bugs.gentoo.org/show_bug.cgi?id=195261 http://docs.info.apple.com/article.html?artnum=307562 http://lists.apple.com/archives/security-announce/2008//May/msg00001.html http://lists.apple.com/archives/security-announce/2008/Mar/msg00001.html http://secunia.com/advisories/27093 http://secunia.com/advisories/27284 http://secunia.com/advisories/27405 http://secunia.com/advisories/27529 http •