——————————————————————
\nDrupal H5P Module <= 2.0.0 (isValidPackage) Zip Slip Vulnerability
\n——————————————————————<\/p>\n[-] Software Link:<\/p>\n
https:\/\/www.drupal.org\/project\/h5p<\/p>\n[-] Affected Versions:<\/p>\n
Version 2.0.0-alpha2 and prior versions.
\nVersion 7.x-1.50 and prior versions.<\/p>\n[-] Vulnerability Description:<\/p>\n
The vulnerability is located within the H5PValidator::isValidPackage()
\nmethod. This implements the following check in order to skip any file or
\nfolder starting with a dot or underscore within the uploaded h5p
\narchive:<\/p>\n
891. $fileName = $zip->statIndex($i)[‘name’];
\n892.
\n893. if (preg_match(‘\/(^[\\._]|\\\/[\\._])\/’, $fileName) !== 0) {
\n894. continue; \/\/ Skip any file or folder starting with a . or _
\n894. }<\/p>\n
This regex check should be enough to prevent path traversal attacks
\nthrough zipped filenames (Zip Slip attacks), because it checks for the
\nstring \u201c\/.\u201d within the filename, thus preventing directory traversal
\nattacks. However, the vulnerability exists if Drupal is running on a
\nWindows server, because in this case the attacker can provide a
\nmalicious h5p archive containing a filename with path traversal
\nsequences like \u201c..\\..\\..\u201d, which would bypass the above regex check.
\nThis can be exploited to write (or overwrite) semi-arbitrary files in
\nthe file system via directory traversal sequences, potentially leading
\nto Stored Cross-Site Scripting (XSS) and other kind of attacks.<\/p>\n[-] Solution:<\/p>\n
No official solution is currently available.<\/p>\n[-] Disclosure Timeline:<\/p>\n[22\/11\/2021] – Vendor notified
\n[28\/02\/2022] – Vendor proposed a possible patch
\n[28\/02\/2022] – Vendor notified about the ineffective patch, provided a
\nfix suggestion
\n[01\/03\/2022] – Vendor fixed the previous patch
\n[30\/03\/2022] – Asked update about the public disclosure and release of a
\npatch, no response
\n[22\/11\/2022] – After one year still no official solution available
\n[03\/12\/2022] – Public disclosure<\/p>\n[-] CVE Reference:<\/p>\n
The Common Vulnerabilities and Exposures project (cve.mitre.org)
\nhas not assigned a CVE identifier for this vulnerability.<\/p>\n[-] Credits:<\/p>\n
Vulnerability discovered by Egidio Romano.<\/p>\n[-] Other References:<\/p>\n
https:\/\/security.drupal.org\/node\/175968<\/p>\n[-] Original Advisory:<\/p>\n
http:\/\/karmainsecurity.com\/KIS-2022-06<\/p>\n","protected":false},"excerpt":{"rendered":"
—————————————————————— Drupal H5P Module <= 2.0.0 (isValidPackage) Zip Slip Vulnerability —————————————————————— [-] Software Link: https:\/\/www.drupal.org\/project\/h5p [-] Affected Versions: Version 2.0.0-alpha2 and prior versions. Version 7.x-1.50 and prior versions. [-] Vulnerability Description: The vulnerability is located within the H5PValidator::isValidPackage() method. This implements the following check in order to skip any file or folder starting with a …<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[26],"tags":[],"class_list":["post-34450","post","type-post","status-publish","format-standard","hentry","category-vulnerability"],"_links":{"self":[{"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/posts\/34450","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/comments?post=34450"}],"version-history":[{"count":2,"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/posts\/34450\/revisions"}],"predecessor-version":[{"id":34778,"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/posts\/34450\/revisions\/34778"}],"wp:attachment":[{"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/media?parent=34450"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/categories?post=34450"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/tags?post=34450"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}