{"id":77984,"date":"2020-04-15T07:42:14","date_gmt":"2020-04-15T05:42:14","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/uyazvimost-v-git-privodyashhaya-k-utechke-uchyotnyh-dannyh"},"modified":"2020-04-15T07:42:14","modified_gmt":"2020-04-15T05:42:14","slug":"uyazvimost-v-git-privodyashhaya-k-utechke-uchyotnyh-dannyh","status":"publish","type":"post","link":"https:\/\/prohoster.info\/pt\/blog\/news\/uyazvimost-v-git-privodyashhaya-k-utechke-uchyotnyh-dannyh","title":{"rendered":"Vulnerabilidade no Git que leva ao vazamento de dados de autentica\u00e7\u00e3o","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

Publicado<\/a><\/noindex> vers\u00f5es corretivas do sistema de controle de vers\u00e3o distribu\u00eddo Git 2.26.1, 2.25.3, 2.24.2, 2.23.2, 2.22.3, 2.21.2, 2.20.3, 2.19.4, 2.18.3 e 2.17.4, nas quais foi corrigido uma vulnerabilidade<\/a><\/noindex> (CVE-2020-5260<\/a><\/noindex>) no manipulador «credential.helper<\/a><\/noindex>«, levando ao envio de credenciais para o host errado quando o cliente git acessa o reposit\u00f3rio por meio de uma URL especialmente formatada que cont\u00e9m um caractere de nova linha. A vulnerabilidade pode ser explorada para enviar credenciais de outro host para um servidor controlado pelo atacante. <\/p>\n

Ao especificar uma URL como \u00abhttps:\/\/evil.com?host=github.com\/\u00bb, o manipulador de credenciais ao conectar-se ao host evil.com transmitir\u00e1 os par\u00e2metros de autentica\u00e7\u00e3o definidos para github.com. O problema se manifesta ao realizar opera\u00e7\u00f5es como \u00abgit clone\u00bb, incluindo ao processar URLs para subm\u00f3dulos (por exemplo, ao executar \u00abgit submodule update\u00bb, as URLs definidas no arquivo .gitmodules do reposit\u00f3rio ser\u00e3o processadas automaticamente). Esta vulnerabilidade \u00e9 particularmente perigosa em situa\u00e7\u00f5es em que um desenvolvedor clona um reposit\u00f3rio sem ver a URL, como ao trabalhar com subm\u00f3dulos, ou em sistemas que executam a\u00e7\u00f5es autom\u00e1ticas, como em scripts de constru\u00e7\u00e3o de pacotes.<\/p>\n

Para bloquear a vulnerabilidade nas novas vers\u00f5es o<\/a><\/noindex> a passagem de caractere de nova linha em quaisquer valores transmitidos atrav\u00e9s do protocolo de troca de credenciais. Para os distribuidores, \u00e9 poss\u00edvel acompanhar o lan\u00e7amento de atualiza\u00e7\u00f5es de pacotes nas p\u00e1ginas Debian<\/a><\/noindex>, Ubuntu<\/a><\/noindex>, RHEL<\/a><\/noindex>, SUSE\/openSUSE<\/a><\/noindex>, Fedora<\/a><\/noindex>, Arch<\/a><\/noindex>, FreeBSD<\/a><\/noindex>.<\/p>\n

Como uma solu\u00e7\u00e3o alternativa para bloquear o problema recomenda-se<\/a><\/noindex> n\u00e3o usar credential.helper ao acessar reposit\u00f3rios p\u00fablicos e n\u00e3o aplicar «git clone» no modo «—recurse-submodules» com reposit\u00f3rios n\u00e3o verificados. Para desativar completamente o manipulador credential.helper, que executa o armazenamento<\/a><\/noindex> e recupera\u00e7\u00e3o de senhas do cache<\/a><\/noindex>, protegido Armazenados em um relat\u00f3rio externo sobre<\/a><\/noindex> ou arquivo de senhas, podem ser usadas os seguintes comandos:<\/p>\n

git config —unset credential.helper
\n git config —global —unset credential.helper
\n git config —system —unset credential.helper<\/p>\n

<\/a><\/noindex><\/p>\n

Fonte: opennet.ru<\/a><\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"

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[…]<\/p>\n","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[702],"tags":[],"class_list":["post-77984","post","type-post","status-publish","format-standard","hentry","category-news"],"aioseo_notices":[],"aioseo_head":"\n\t\t\n\t\n\t\n\t\n\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\n","aioseo_head_json":{"title":"\ud83e\udd47Vulnerabilidade no Git que leva ao vazamento de credenciais | ProHoster","description":"Foram publicadas vers\u00f5es corretivas do sistema de controle de vers\u00e3o distribu\u00eddo Git 2.26.1, 2.25.3, 2.24.2, 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