tag:blogger.com,1999:blog-9468794485810349412024-03-12T23:20:51.525-07:00Ingeniería de la SeguridadBlog dedicado a la Ingeniería de la SeguridadAnonymoushttp://www.blogger.com/profile/14206631308287341055noreply@blogger.comBlogger4125tag:blogger.com,1999:blog-946879448581034941.post-19174852090714833882013-05-15T07:31:00.001-07:002013-05-15T07:31:15.731-07:00Seguridad física<!--[if gte mso 9]><xml>
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<div class="MsoNormal">
No todas las amenazas o posibles ataques provienen del
peligroso mundo de Internet. Queremos hablaros sobre posibles riesgos físicos para
los valiosos activos de una compañía.</div>
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<br /></div>
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<b style="mso-bidi-font-weight: normal;"><i style="mso-bidi-font-style: normal;">Inundaciones</i></b></div>
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Hay que tener en cuenta posibles inundaciones o riadas que
conviertan en material inservible cualquier equipo o material de la sala de
ordenadores. </div>
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Hay que protegerse de las posibles inundaciones analizando
la zona dónde se ubicará la sala, haciendo conducciones por donde se evacuaría
el agua, e impermeabilizando la sala.</div>
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Otro paso es la detección con sensores de agua. Y un último
paso que sería la corrección del problema con desagües y fundas para los
equipos.</div>
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<br /></div>
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<b style="mso-bidi-font-weight: normal;"><i style="mso-bidi-font-style: normal;">Incendios</i></b></div>
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Se recomienda el uso de materiales ignífugos y el uso de
aire acondicionado independiente para prevenir un posible fuego cerca del
hardware. <span style="mso-spacerun: yes;"> </span>Y para detectar y extinguir el
incendio se debería contar con detectores de humo y calor, extintores o
mangueras para un apagado manual del fuego o incluso rociadores automáticos de
agua. Aunque se debe disponer del mínimo impuesto por la normativa técnica y
legal ante incendios de la Unión Europea.</div>
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<br /></div>
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<b style="mso-bidi-font-weight: normal;"><i style="mso-bidi-font-style: normal;">Problemas Eléctricos</i></b></div>
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Hay que tener en cuenta los cortes, picos de tensión o ruidos
provocados por la instalación eléctrica. Por lo que se recomienda el uso de
equipos de continuidad eléctrica. Como SAI, Sistema de Alimentación
Independiente, que provee de energía en caso de un corte indefinido en la
tensión. Algo que permitiría salvar datos.</div>
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<br /></div>
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<b style="mso-bidi-font-weight: normal;"><i style="mso-bidi-font-style: normal;">Campos Electromagnéticos </i></b></div>
<div class="MsoNormal">
Peligros como los imanes, los radares o los transmisores
pueden afectar gravemente a nuestro hardware. Por lo que se recomienda el
apantallamiento para evitarlo. TEMPEST es una manera de reducir los efectos de
esta amenaza.</div>
<div class="MsoNormal">
<br /></div>
<div class="MsoNormal">
En resumen, no analizar los posibles riesgos de la
naturaleza para colocar los equipos en un lugar con bajo riesgo, puede
costarnos caro. Por lo que se recomienda encarecidamente invertir en seguridad física
para no lamentarlo más tarde.</div>
Anonymoushttp://www.blogger.com/profile/14206631308287341055noreply@blogger.com0tag:blogger.com,1999:blog-946879448581034941.post-92040058952625354932013-05-15T04:35:00.000-07:002013-05-15T04:38:44.858-07:00Paradojas en la seguridad de navegadores web<!--[if gte mso 9]><xml>
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<br />
<div class="MsoNormal" style="line-height: normal; margin-bottom: 0.0001pt; text-align: justify;">
<span style="font-size: small;"><span style="color: black; font-family: "Helvetica","sans-serif";">Hoy
nos encontramos ante lo que, a primera vista, se podría considerar una especie
de paradoja en la aproximación a la seguridad en navegadores: el navegador más seguro es el que tiene más fallos de seguridad y el más popular. Con el paso del tiempo, esto ha significado que lo más importante es garantizar protección frente a corregir los agujeros de seguridad.</span></span></div>
<div class="MsoNormal" style="line-height: normal; margin-bottom: 0.0001pt; text-align: justify;">
<span style="font-size: small;"><span style="color: black; font-family: "Helvetica","sans-serif";"><br /></span></span></div>
<div style="text-align: justify;">
<span style="font-size: small;"><span style="color: black; font-family: "Helvetica","sans-serif";">La creencia popular es: "El navegador más usado es el más atacado". Y si ocurre como con Internet Explorer, que además es el que más fallos tiene, ¿quién es el loco que se atrevería a usarlo? </span></span></div>
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<span style="color: black; font-family: "Helvetica","sans-serif"; font-size: 14pt;"></span></div>
<div class="separator" style="clear: both; text-align: center;">
<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiXLc3Qrgx73_RT7izxa7vdPWvpgwYGmDDSK3MWmRPC9NKKue38ozTHONOaD-0fJKQI9Ro17hh8vqri1qlWuamG3EaDUl4i9339niBXjpYT-kEw9RxBCT1ACy415u2Fm53SaRukh7n53tZM/s1600/Dibujo.bmp" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiXLc3Qrgx73_RT7izxa7vdPWvpgwYGmDDSK3MWmRPC9NKKue38ozTHONOaD-0fJKQI9Ro17hh8vqri1qlWuamG3EaDUl4i9339niBXjpYT-kEw9RxBCT1ACy415u2Fm53SaRukh7n53tZM/s1600/Dibujo.bmp" height="204" width="320" /> </a> </div>
<span style="font-size: xx-small;"><span style="color: black; font-family: "Helvetica","sans-serif";"></span></span><br />
<div class="separator" style="clear: both; text-align: center;">
<span style="font-size: xx-small;"><span style="color: black; font-family: "Helvetica","sans-serif";">Uso actual de navegadores (Stat Counter)</span></span></div>
<span style="font-size: xx-small;"><span style="color: black; font-family: "Helvetica","sans-serif";">
</span></span><br />
<div style="text-align: justify;">
<br /></div>
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<span style="font-size: small;"><span style="color: black; font-family: "Helvetica","sans-serif";">En
los 90 los navegadores que se usaban principalmente eran Netscape e Internet
Explorer. Los dos eran pésimos en cuanto a seguridad. Pero no
importaba demasiado a los atacantes. La industria del malware no estaba tan
desarrollada, y se
disponían de otros medios para infectar a las víctimas: el email y el ataque
directo a los puertos y servicios. </span></span></div>
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<span style="font-size: small;"><span style="color: black; font-family: "Helvetica","sans-serif";">Los
sistemas y programas de correo no eran tan efectivos contra el malware,
los usuarios no estaban tan concienciados y además, muchos se conectaban
directamente a Internet sin cortafuegos entrante. En esta década los atacantes no estaban tan interesados en web.</span></span></div>
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<span style="font-size: small;"><span style="color: black; font-family: "Helvetica","sans-serif";">En el nuevo milenio, Internet Explorer tomó la delantera, pero cometió el error de pensar que nadie le haría la competencia. El cortafuegos se instauró
como norma y además los usuarios se conectaban por ADSL, por lo que solían
permanecer detrás del cortafuegos del router. El spam se controló en parte y el
usuario se concienció. Por ello, los atacantes se empezaron a centrar en los navegadores, en la pcapa de aplicaciones.. Contaban con una enorme
ventaja con Internet Explorer: estaba muy extendido su uso y era muy inseguro. El problema creció y
aparecieron alternativas serias: Firefox y Chrome. La guerra se centró no tanto
en la cuota de uso sino en ofrecer elementos
diferenciadores: seguridad en profundidad.</span></span></div>
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<span style="font-size: small;"><span style="color: black; font-family: "Helvetica","sans-serif";">En la actualidad, la batalla la ha ganado Chrome por, entre otras cosas, centrarse en la
seguridad. Pero no cualquier tipo de seguridad, sino en la defensiva. Si bien es el navegador con
mayor número de fallos, es el más complejo de explotar. La paradoja se cumple con él. Veamos por qué.</span></span></div>
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<span style="font-size: small;"><span style="color: black; font-family: "Helvetica","sans-serif";">Chrome, desde un principio, se centró no tanto en bajar el número de fallos, sino en que estos no fueran
explotables. Apostó por separar las pestañas en procesos con bajos niveles de
integridad, por el ASLR y el DEP en sus procesos, por meter los plugins en
sandbox, por las actualizaciones automáticas "sin permiso" y por
motivar fuertemente a los investigadores para que le detectaran los fallos de
seguridad (paga bien cada vulnerabilidad encontrada y reportada). De hecho, se
atrevió a ofrecer hasta 1.000.000 de dólares por la ejecución de código
arbitrario en Chrome bajo Windows 7. Lo consiguieron, pero sólo un equipo fue capaz de dar con la solución tras mes y medio trabajando en ello. ¿Están los atacantes a la altura? La respuesta es afirmativa, pero de lograrlo, deben plantearse si sacarán mayor tajada reportándolo a Google o de forma ilícita. Esta es la paradoja de Chrome,
siendo el que más</span></span><span style="font-size: small;"><span style="color: black; font-family: "Helvetica","sans-serif"; line-height: 115%;"> fallos de seguridad acumula año tras año, y con una cuota de mercado más
que respetable, es el más seguro "ahí fuera". </span></span></div>
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<br /></div>
<div class="MsoNormal" style="line-height: normal; margin-bottom: 0.0001pt; text-align: justify;">
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Anonymoushttp://www.blogger.com/profile/14206631308287341055noreply@blogger.com0tag:blogger.com,1999:blog-946879448581034941.post-77043454809500602602013-04-07T09:13:00.000-07:002013-04-07T09:13:30.545-07:00Programas malignos<br />
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El número de software malicioso o programas malignos ha
incrementado su número sustancialmente. Lo que provoca que haya más amenazas
para la seguridad de los sistemas.<o:p></o:p></div>
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<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhqYOIzy6XRg9KeNptA_sQSCmi5qDNoABqQJ-B2DBPnInp9Yv7j5Cy9YvFe21zh5Qhc_41wUSJ7I7GqINFy3TcLuLO2VsiK1q3bnvG0yzNPze4tsJC-BkIGJ-ZasM2YNJodq6yTNsCT-rw7/s1600/programas+malignos.JPG" imageanchor="1" style="clear: right; float: right; margin-bottom: 1em; margin-left: 1em;"><img border="0" height="204" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhqYOIzy6XRg9KeNptA_sQSCmi5qDNoABqQJ-B2DBPnInp9Yv7j5Cy9YvFe21zh5Qhc_41wUSJ7I7GqINFy3TcLuLO2VsiK1q3bnvG0yzNPze4tsJC-BkIGJ-ZasM2YNJodq6yTNsCT-rw7/s320/programas+malignos.JPG" width="320" /></a></div>
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La historia del software maligno trata
desde la definición teórica de Von Neumann, pasando por los Core Wars, Elk
Cloner (Primer virus propagado), Brain de los hermanos Farooq de Pakistán y el
Gusano de Morris.<o:p></o:p></div>
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Recientemente famoso es el virus
de la policía, que intentaba engañar a los usuarios simulando proceder de los
cuerpos de seguridad del estado. Pidiendo una cantidad de dinero por una
supuesta actividad ilegal por parte del usuario.<o:p></o:p></div>
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Existen varios tipos de código malicioso, algunos son: <o:p></o:p></div>
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<li><span style="font-size: 7pt; text-indent: -18pt;"> </span><span style="text-indent: -18pt;">Virus</span></li>
<li><span style="font-size: 7pt; text-indent: -18pt;"> </span><span style="text-indent: -18pt;">Gusanos</span></li>
<li><span style="font-size: 7pt; text-indent: -18pt;"> </span><span style="text-indent: -18pt;">Caballos de Troya</span></li>
<li><span style="font-size: 7pt; text-indent: -18pt;"> </span><span style="text-indent: -18pt;">Puertas traseras</span></li>
<li><span style="font-size: 7pt; text-indent: -18pt;"> </span><span style="text-indent: -18pt;">Bombas lógicas</span></li>
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Los objetivos de los creadores
han ido evolucionando desde los ataques a la integridad, a los ataques a la
confidencialidad y llegando a los ataques a la disponibilidad.<o:p></o:p></div>
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Podemos ver que pueden ser autónomos
o no autónomos, o incluso se pueden clasificar en autorreproductores o no autorreproductores.
<o:p></o:p></div>
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Los virus se pueden
autorreproducir, y se incrustan en el código de otro programa. Colocándose en
el equipo a dañar y atacando posteriormente. Un virus tiene una fase de
infección, siguiendo una latencia o espera, una activación y un daño. El código
de un virus se divide en código autorreproductor, código de activación y código
de daño.<o:p></o:p></div>
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En otra entrada hablaremos más
sobre los virus, y diferentes tipos de virus.<o:p></o:p></div>
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Anonymoushttp://www.blogger.com/profile/14206631308287341055noreply@blogger.com0tag:blogger.com,1999:blog-946879448581034941.post-3658938652476528332013-03-25T09:10:00.001-07:002013-04-03T07:54:44.926-07:00Ingeniería de la Seguridad en las tecnologías de la Información Este blog está dedicado a articulos correspondientes a la Ingenieria de la Seguridad. Podrá encontrar diferentes apartados que hablarán de temas muy interesantes.<br />
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La Ingeniería de la seguridad es una rama de ingenieria que se centra en la seguridad de un sistema, ante todo tipo de problemas o riesgos. En nuestro caso, nos interesa más la parte centrada en los sistemas de información, tales como centros de datos, información sensible de nuestra organización, o simplemente de nuestros datos personales.<br />
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Las principales preocupaciones tecnológicas actuales son:<br />
<ul>
<li>Web 2.0 (Blogs y redes sociales)</li>
<li>Smartphones (Android y Iphone)</li>
<li>Infraestructuras Críticas</li>
<li>BYOD(Bring Your Own Devices)</li>
<li>Cloud Computing </li>
</ul>
Son nuevos paradigmas que hacen que los ingenieros de la seguridad trabajen para proteger la información que tratan los sistemas anteriormente citados.<br />
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La evolución de la tecnología hacía sistemas complejos, interdependientes, que tienen comportamientos inesperados y errores imprevisibles hacen que existan amenazas y vulnerabilidades que hacen que potenciales atacantes puedan poner en riesgo nuestro sistema.<br />
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Los objetivos de la ingeniería de la seguridad deben ser la confidencialidad, integridad y disponiblidad de las tecnologías de la información.<br />
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Anonymoushttp://www.blogger.com/profile/14206631308287341055noreply@blogger.com0