{"id":102842,"date":"2022-01-02T15:36:38","date_gmt":"2022-01-02T13:36:38","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/%d0%b2%d1%8b%d0%bf%d1%83%d1%81%d0%ba-%d1%83%d1%82%d0%b8%d0%bb%d0%b8%d1%82%d1%8b-gnu-cflow-1-7"},"modified":"2022-01-02T15:36:38","modified_gmt":"2022-01-02T13:36:38","slug":"%d0%b2%d1%8b%d0%bf%d1%83%d1%81%d0%ba-%d1%83%d1%82%d0%b8%d0%bb%d0%b8%d1%82%d1%8b-gnu-cflow-1-7","status":"publish","type":"post","link":"https:\/\/prohoster.info\/pt\/blog\/news\/%d0%b2%d1%8b%d0%bf%d1%83%d1%81%d0%ba-%d1%83%d1%82%d0%b8%d0%bb%d0%b8%d1%82%d1%8b-gnu-cflow-1-7","title":{"rendered":"Lan\u00e7amento da ferramenta GNU cflow 1.7","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p>Ap\u00f3s tr\u00eas anos de desenvolvimento, foi lan\u00e7ado o GNU cflow 1.7, uma ferramenta projetada para criar um gr\u00e1fico visual de chamadas de fun\u00e7\u00f5es em programas em C, que pode ser usada para simplificar o entendimento da l\u00f3gica de funcionamento de um aplicativo. O gr\u00e1fico \u00e9 constru\u00eddo exclusivamente com base na an\u00e1lise dos c\u00f3digos fonte, sem a necessidade de executar o programa. Suporta a gera\u00e7\u00e3o de gr\u00e1ficos diretos e reversos de fluxos de execu\u00e7\u00e3o, bem como a gera\u00e7\u00e3o de listas de refer\u00eancias cruzadas para arquivos de c\u00f3digo.            <\/p>\n<p>A vers\u00e3o \u00e9 not\u00e1vel pela implementa\u00e7\u00e3o do suporte ao formato de sa\u00edda \"dot\" (\"--format=dot\") para gerar resultados na linguagem DOT para visualiza\u00e7\u00e3o subsequente no pacote Graphviz. Adicionada a possibilidade de indicar v\u00e1rias fun\u00e7\u00f5es de inicializa\u00e7\u00e3o atrav\u00e9s da duplica\u00e7\u00e3o da op\u00e7\u00e3o \"--main\"; para cada uma dessas fun\u00e7\u00f5es, ser\u00e1 gerado um gr\u00e1fico separado. Tamb\u00e9m foi adicionada a op\u00e7\u00e3o \"--target=FUNCTION\" que permite limitar o gr\u00e1fico resultante apenas ao ramo que inclui fun\u00e7\u00f5es espec\u00edficas (a op\u00e7\u00e3o \"--target\" pode ser indicada v\u00e1rias vezes). No modo cflow, novos comandos foram adicionados para navegar pelo gr\u00e1fico: \"c\" \u2014 ir para a fun\u00e7\u00e3o chamadora, \"n\" \u2014 ir para a pr\u00f3xima fun\u00e7\u00e3o no mesmo n\u00edvel de aninhamento e \"p\" \u2014 ir para a fun\u00e7\u00e3o anterior no mesmo n\u00edvel de aninhamento.    <\/p>\n<p>Na nova vers\u00e3o, tamb\u00e9m foram corrigidas duas vulnerabilidades que foram identificadas ainda em 2019 e levam a danos \u00e0 mem\u00f3ria ao processar textos fonte especificamente formatados no cflow. A primeira vulnerabilidade (CVE-2019-16165) \u00e9 causada por acessos \u00e0 mem\u00f3ria ap\u00f3s sua libera\u00e7\u00e3o (use-after-free) no c\u00f3digo do parser (fun\u00e7\u00e3o reference em parser.c). A segunda vulnerabilidade (CVE-2019-16166) est\u00e1 relacionada a um estouro de buffer na fun\u00e7\u00e3o nexttoken(). De acordo com os desenvolvedores, os problemas identificados n\u00e3o representam uma amea\u00e7a \u00e0 seguran\u00e7a, pois se limitam a uma falha da ferramenta.<br \/>\n<br \/>Fonte: <a content=\"nofollow\" rel=\"nofollow\" href=\"https:\/\/www.opennet.ru\/opennews\/art.shtml?num=56444\">opennet.ru<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"<p>\u041f\u043e\u0441\u043b\u0435 \u0442\u0440\u0451\u0445 \u043b\u0435\u0442 \u0440\u0430\u0437\u0440\u0430\u0431\u043e\u0442\u043a\u0438 \u043e\u043f\u0443\u0431\u043b\u0438\u043a\u043e\u0432\u0430\u043d \u0432\u044b\u043f\u0443\u0441\u043a \u0443\u0442\u0438\u043b\u0438\u0442\u044b GNU cflow 1.7, \u043f\u0440\u0435\u0434\u043d\u0430\u0437\u043d\u0430\u0447\u0435\u043d\u043d\u043e\u0439 \u0434\u043b\u044f \u043f\u043e\u0441\u0442\u0440\u043e\u0435\u043d\u0438\u044f \u043d\u0430\u0433\u043b\u044f\u0434\u043d\u043e\u0433\u043e \u0433\u0440\u0430\u0444\u0430 \u0432\u044b\u0437\u043e\u0432\u043e\u0432 \u0444\u0443\u043d\u043a\u0446\u0438\u0439 \u0432 \u043f\u0440\u043e\u0433\u0440\u0430\u043c\u043c\u0430\u0445 \u043d\u0430 \u044f\u0437\u044b\u043a\u0435 \u0421\u0438, \u043a\u043e\u0442\u043e\u0440\u044b\u0439 \u043c\u043e\u0436\u0435\u0442 \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u0442\u044c\u0441\u044f \u0434\u043b\u044f \u0443\u043f\u0440\u043e\u0449\u0435\u043d\u0438\u044f \u0438\u0437\u0443\u0447\u0435\u043d\u0438\u044f \u043b\u043e\u0433\u0438\u043a\u0438 \u0440\u0430\u0431\u043e\u0442\u044b \u043f\u0440\u0438\u043b\u043e\u0436\u0435\u043d\u0438\u044f. \u0413\u0440\u0430\u0444 \u0441\u0442\u0440\u043e\u0438\u0442\u0441\u044f \u0442\u043e\u043b\u044c\u043a\u043e \u043d\u0430 \u043e\u0441\u043d\u043e\u0432\u0435 \u0430\u043d\u0430\u043b\u0438\u0437\u0430 \u0438\u0441\u0445\u043e\u0434\u043d\u044b\u0445 \u0442\u0435\u043a\u0441\u0442\u043e\u0432, \u0431\u0435\u0437 \u043d\u0435\u043e\u0431\u0445\u043e\u0434\u0438\u043c\u043e\u0441\u0442\u0438 \u0432\u044b\u043f\u043e\u043b\u043d\u0435\u043d\u0438\u044f \u043f\u0440\u043e\u0433\u0440\u0430\u043c\u043c\u044b. \u041f\u043e\u0434\u0434\u0435\u0440\u0436\u0438\u0432\u0430\u0435\u0442\u0441\u044f \u0433\u0435\u043d\u0435\u0440\u0430\u0446\u0438\u044f \u043a\u0430\u043a \u043f\u0440\u044f\u043c\u044b\u0445, \u0442\u0430\u043a \u0438 \u043e\u0431\u0440\u0430\u0442\u043d\u044b\u0445 \u0433\u0440\u0430\u0444\u043e\u0432 \u043f\u043e\u0442\u043e\u043a\u043e\u0432 \u0432\u044b\u043f\u043e\u043b\u043d\u0435\u043d\u0438\u044f, \u0430 \u0442\u0430\u043a\u0436\u0435 [&hellip;]<\/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-102842","post","type-post","status-publish","format-standard","hentry","category-news"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 5.0.3 - aioseo.com -->\n\t<meta name=\"description\" content=\"\u041f\u043e\u0441\u043b\u0435 \u0442\u0440\u0451\u0445 \u043b\u0435\u0442 \u0440\u0430\u0437\u0440\u0430\u0431\u043e\u0442\u043a\u0438 \u043e\u043f\u0443\u0431\u043b\u0438\u043a\u043e\u0432\u0430\u043d \u0432\u044b\u043f\u0443\u0441\u043a \u0443\u0442\u0438\u043b\u0438\u0442\u044b GNU cflow 1.7, \u043f\u0440\u0435\u0434\u043d\u0430\u0437\u043d\u0430\u0447\u0435\u043d\u043d\u043e\u0439 \u0434\u043b\u044f \u043f\u043e\u0441\u0442\u0440\u043e\u0435\u043d\u0438\u044f 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