{"id":55959,"date":"2024-05-01T01:37:36","date_gmt":"2024-05-01T01:37:36","guid":{"rendered":"https:\/\/www.threatshub.org\/blog\/open-source-programming-language-r-patches-gnarly-arbitrary-code-exec-flaw\/"},"modified":"2024-05-01T01:37:36","modified_gmt":"2024-05-01T01:37:36","slug":"open-source-programming-language-r-patches-gnarly-arbitrary-code-exec-flaw","status":"publish","type":"post","link":"https:\/\/www.threatshub.org\/blog\/open-source-programming-language-r-patches-gnarly-arbitrary-code-exec-flaw\/","title":{"rendered":"Open source programming language R patches gnarly arbitrary code exec flaw"},"content":{"rendered":"<p>The open source R programming language \u2013 popular among statisticians and data scientists for performing visualization, machine learning, and suchlike \u2013 has patched an arbitrary code execution hole that scored a preliminary CVSS severity rating of 8.8 out of 10.<\/p>\n<p>The vulnerability, tagged <a target=\"_blank\" rel=\"nofollow noopener\" href=\"https:\/\/nvd.nist.gov\/vuln\/detail\/CVE-2024-27322\">CVE-2024-27322<\/a>, can be exploited by tricking someone into loading a maliciously crafted RDS (R Data Serialization) file into an R-based project, or by fooling them into integrating a poisoned R package into a code base. Doing so will trigger the execution of a code payload within the file or package, which could leak the user&#8217;s files to another source, delete data, or perform other devilish activities.<\/p>\n<p>The hole was <a target=\"_blank\" rel=\"nofollow noopener\" href=\"https:\/\/www.kb.cert.org\/vuls\/id\/238194\">closed<\/a> in version 4.4.0 of R Core, which was released earlier this month \u2013 upgrading ASAP is strongly advised.<\/p>\n<div aria-hidden=\"true\" class=\"adun\" data-pos=\"top\" data-raptor=\"condor\" data-xsm=\",fluid,mpu,\" data-sm=\",fluid,mpu,\" data-md=\",fluid,mpu,\"> <noscript> <a href=\"https:\/\/pubads.g.doubleclick.net\/gampad\/jump?co=1&amp;iu=\/6978\/reg_security\/patches&amp;sz=300x50%7C300x100%7C300x250%7C300x251%7C300x252%7C300x600%7C300x601&amp;tile=2&amp;c=2ZjHkbRewwtw@RThFSH40zAAAAAw&amp;t=ct%3Dns%26unitnum%3D2%26raptor%3Dcondor%26pos%3Dtop%26test%3D0\" target=\"_blank\" rel=\"noopener\"> <img decoding=\"async\" src=\"https:\/\/pubads.g.doubleclick.net\/gampad\/ad?co=1&amp;iu=\/6978\/reg_security\/patches&amp;sz=300x50%7C300x100%7C300x250%7C300x251%7C300x252%7C300x600%7C300x601&amp;tile=2&amp;c=2ZjHkbRewwtw@RThFSH40zAAAAAw&amp;t=ct%3Dns%26unitnum%3D2%26raptor%3Dcondor%26pos%3Dtop%26test%3D0\" alt> <\/a> <\/noscript> <\/div>\n<p>The flaw lies in how R deserializes data. R&#8217;s built-in deserialization feature, which loads information from files to unpack into data structures in memory, is insecure and can be exploited to execute arbitrary code on a victim&#8217;s machine.<\/p>\n<div aria-hidden=\"true\" class=\"adun\" data-pos=\"top\" data-raptor=\"falcon\" data-xmd=\",fluid,mpu,leaderboard,\" data-lg=\",fluid,mpu,leaderboard,\" data-xlg=\",fluid,billboard,superleaderboard,mpu,leaderboard,\" data-xxlg=\",fluid,billboard,superleaderboard,brandwidth,brandimpact,leaderboard,mpu,\"> <noscript> <a href=\"https:\/\/pubads.g.doubleclick.net\/gampad\/jump?co=1&amp;iu=\/6978\/reg_security\/patches&amp;sz=300x50%7C300x100%7C300x250%7C300x251%7C300x252%7C300x600%7C300x601&amp;tile=4&amp;c=44ZjHkbRewwtw@RThFSH40zAAAAAw&amp;t=ct%3Dns%26unitnum%3D4%26raptor%3Dfalcon%26pos%3Dmid%26test%3D0\" target=\"_blank\" rel=\"noopener\"> <img decoding=\"async\" src=\"https:\/\/pubads.g.doubleclick.net\/gampad\/ad?co=1&amp;iu=\/6978\/reg_security\/patches&amp;sz=300x50%7C300x100%7C300x250%7C300x251%7C300x252%7C300x600%7C300x601&amp;tile=4&amp;c=44ZjHkbRewwtw@RThFSH40zAAAAAw&amp;t=ct%3Dns%26unitnum%3D426raptor%3Dfalcon%26pos%3Dmid%26test%3D0\" alt> <\/a> <\/noscript> <\/div>\n<div class=\"adun_eagle_desktop_story_wrapper\">\n<div aria-hidden=\"true\" class=\"adun\" data-pos=\"mid\" data-raptor=\"eagle\" data-xxlg=\",mpu,dmpu,\"> <noscript> <a href=\"https:\/\/pubads.g.doubleclick.net\/gampad\/jump?co=1&amp;iu=\/6978\/reg_security\/patches&amp;sz=300x50%7C300x100%7C300x250%7C300x251%7C300x252%7C300x600%7C300x601&amp;tile=3&amp;c=33ZjHkbRewwtw@RThFSH40zAAAAAw&amp;t=ct%3Dns%26unitnum%3D3%26raptor%3Deagle%26pos%3Dmid%26test%3D0\" target=\"_blank\" rel=\"noopener\"> <img decoding=\"async\" src=\"https:\/\/pubads.g.doubleclick.net\/gampad\/ad?co=1&amp;iu=\/6978\/reg_security\/patches&amp;sz=300x50%7C300x100%7C300x250%7C300x251%7C300x252%7C300x600%7C300x601&amp;tile=3&amp;c=33ZjHkbRewwtw@RThFSH40zAAAAAw&amp;t=ct%3Dns%26unitnum%3D3%26raptor%3Deagle%26pos%3Dmid%26test%3D0\" alt> <\/a> <\/noscript> <\/div>\n<\/p><\/div>\n<p>The good news is that it is somewhat complicated to exploit, according to <a target=\"_blank\" rel=\"nofollow noopener\" href=\"https:\/\/hiddenlayer.com\/research\/r-bitrary-code-execution\/\">this analysis<\/a> by Kasimir Schulz and Kieran Evans at AI security shop HiddenLayer. For the nitty-gritty, see their write-up which, as they put it, &#8220;involves the use of promise objects and lazy evaluation in R.&#8221;<\/p>\n<p>The biz offers some proof-of-concept code to exploit this security oversight, which prints out some text when a malicious file is deserialized by R. This code can be swapped out for something far more malicious.<\/p>\n<h3 class=\"crosshead\">Attacks could target supply chains or even specific individuals<\/h3>\n<p>HiddenLayer warns attackers could use the oversight to compromise the software supply chain.<\/p>\n<p>The Comprehensive R Archive Network (CRAN) hosts and distributes over 20,000 R packages, and anyone could upload one \u2013 including one that has malicious code secretly embedded into it. At the time the HiddenLayer advisory was written, CRAN&#8217;s automatic scans didn&#8217;t check packages for a CVE-2024-27322 exploit.<\/p>\n<div aria-hidden=\"true\" class=\"adun\" data-pos=\"top\" data-raptor=\"falcon\" data-xsm=\",fluid,mpu,\" data-sm=\",fluid,mpu,\" data-md=\",fluid,mpu,\"> <noscript> <a href=\"https:\/\/pubads.g.doubleclick.net\/gampad\/jump?co=1&amp;iu=\/6978\/reg_security\/patches&amp;sz=300x50%7C300x100%7C300x250%7C300x251%7C300x252%7C300x600%7C300x601&amp;tile=4&amp;c=44ZjHkbRewwtw@RThFSH40zAAAAAw&amp;t=ct%3Dns%26unitnum%3D4%26raptor%3Dfalcon%26pos%3Dmid%26test%3D0\" target=\"_blank\" rel=\"noopener\"> <img decoding=\"async\" src=\"https:\/\/pubads.g.doubleclick.net\/gampad\/ad?co=1&amp;iu=\/6978\/reg_security\/patches&amp;sz=300x50%7C300x100%7C300x250%7C300x251%7C300x252%7C300x600%7C300x601&amp;tile=4&amp;c=44ZjHkbRewwtw@RThFSH40zAAAAAw&amp;t=ct%3Dns%26unitnum%3D426raptor%3Dfalcon%26pos%3Dmid%26test%3D0\" alt> <\/a> <\/noscript> <\/div>\n<p>What&#8217;s especially concerning is that merely loading a package can trigger the hidden payload. HiddenLayer demonstrated that even opening the R Console could activate arbitrary code execution.<\/p>\n<p>&#8220;Like Python&#8217;s pickle module, the exploitation of this vulnerability depends a lot on the environment of the targeted user but opens a lot of potential attack vectors,&#8221; HiddenLayer&#8217;s principal security researcher Kasimir Schulz told <em>The Register<\/em>.<\/p>\n<p>&#8220;These could include social engineering a user to download a malicious file, allowing a file write attack to become a code execution attack, or even allowing a remote attack if a service allows for untrusted RDS formatted data to be uploaded.<\/p>\n<p>&#8220;As an example for the targeted approach, a threat actor could craft such a file and sneak into researcher communities under the guise of a researcher seeking help.<\/p>\n<p>&#8220;They could then send their code and a &#8216;dataset&#8217; in the RDS format to other researchers who have offered to help them, with any who load the RDS file having their entire system compromised.&#8221;<\/p>\n<div aria-hidden=\"true\" class=\"adun\" id=\"story_eagle_xsm_sm_md_xmd_lg_xlg\" data-pos=\"mid\" data-raptor=\"eagle\" data-xsm=\",mpu,dmpu,\" data-sm=\",mpu,dmpu,\" data-md=\",mpu,dmpu,\" data-xmd=\",mpu,dmpu,\" data-lg=\",mpu,dmpu,\" data-xlg=\",mpu,dmpu,\"> <noscript> <a href=\"https:\/\/pubads.g.doubleclick.net\/gampad\/jump?co=1&amp;iu=\/6978\/reg_security\/patches&amp;sz=300x50%7C300x100%7C300x250%7C300x251%7C300x252%7C300x600%7C300x601&amp;tile=3&amp;c=33ZjHkbRewwtw@RThFSH40zAAAAAw&amp;t=ct%3Dns%26unitnum%3D3%26raptor%3Deagle%26pos%3Dmid%26test%3D0\" target=\"_blank\" rel=\"noopener\"> <img decoding=\"async\" src=\"https:\/\/pubads.g.doubleclick.net\/gampad\/ad?co=1&amp;iu=\/6978\/reg_security\/patches&amp;sz=300x50%7C300x100%7C300x250%7C300x251%7C300x252%7C300x600%7C300x601&amp;tile=3&amp;c=33ZjHkbRewwtw@RThFSH40zAAAAAw&amp;t=ct%3Dns%26unitnum%3D3%26raptor%3Deagle%26pos%3Dmid%26test%3D0\" alt> <\/a> <\/noscript> <\/div>\n<p>We&#8217;ve asked CRAN for comment. In the meantime, don&#8217;t forget to patch. \u00ae<\/p>\n<p> READ MORE <a href=\"https:\/\/go.theregister.com\/feed\/www.theregister.com\/2024\/05\/01\/r_programming_language_ace_vuln\/\">HERE<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>An ACE in the hole for miscreants The open source R programming language \u2013 popular among statisticians and data scientists for performing visualization, machine learning, and suchlike \u2013 has patched an arbitrary code execution hole that scored a preliminary CVSS severity rating of 8.8 out of 10.\u2026 READ MORE HERE&#8230;<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"colormag_page_layout":"default_layout","footnotes":""},"categories":[63],"tags":[],"class_list":["post-55959","post","type-post","status-publish","format-standard","hentry","category-the-register"],"yoast_head":"<!-- This site is optimized with the 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