CyberRota Analysis
AI-GeneratedThe Junrar library in Java, prior to version 7.6.1, is vulnerable to directory creation outside the intended extraction root when processing malicious RAR archive entries. This flaw allows for filesystem pollution and potential file-versus-directory squatting, which could disrupt security-sensitive operations. Developers using affected versions of Junrar should prioritize upgrading to version 7.6.1 to mitigate these risks.
Public Exploit Signal
A public exploit, PoC, GitHub repository or Metasploit reference was detected for this CVE.
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Original NVD Description
Junrar is an open source Java RAR archive library. Prior to version 7.6.1, LocalFolderExtractor in src/main/java/com/github/junrar/LocalFolderExtractor.java can create directories outside the intended extraction root when processing a crafted archive entry. LocalFolderExtractor.createFile() validates only the final canonical file path, while LocalFolderExtractor.makeFile() creates intermediate path segments with unchecked mkdir() calls. An entry can therefore make the final path resolve inside the destination while causing intermediate directory creation outside it, enabling filesystem pollution or file-versus-directory squatting that can make later security-sensitive writes fail. The demonstrated impact is directory creation, not unconditional arbitrary file-content write. This issue is fixed in version 7.6.1.