Advisories for Maven/Com.github.junrar/Junrar package

Junrar's RAR virtual machine can be forced into a deterministic infinite loop while extracting a crafted RAR4 archive. The RarVM.ExecuteCode loop is intended to be bounded by maxOpCount, but jump instructions can bypass this limit when setIP() is called with a target instruction pointer greater than or equal to codeSize. An unauthenticated attacker who can provide a RAR archive to an application using Junrar.extract() can cause the extraction thread to …

LocalFolderExtractor validates only the final canonical file path before extraction. However, makeFile() creates intermediate directories one path segment at a time without checking whether each created directory remains inside the destination folder. A malicious RAR entry can make the final file path resolve inside the extraction destination, while causing intermediate mkdir() calls to create attacker-chosen directories outside the extraction root. This is an extraction root escape via unchecked intermediate directory …

A path traversal vulnerability in LocalFolderExtractor allows an attacker to write arbitrary files with attacker-controlled content into sibling directories when a crafted RAR archive is extracted.

A path traversal vulnerability in LocalFolderExtractor allows an attacker to write arbitrary files with attacker-controlled content into sibling directories when a crafted RAR archive is extracted.

A backslash path traversal vulnerability in LocalFolderExtractor allows an attacker to write arbitrary files with attacker-controlled content anywhere on the filesystem when a crafted RAR archive is extracted on Linux/Unix. This can often lead to remote code execution (e.g., overwriting shell profiles, source code, cron jobs, etc).

Junrar is an open source java RAR archive library. The impact depends solely on how the application uses the library, and whether files can be provided by malignant users. The problem is patched There are no known workarounds and users are advised to upgrade as soon as possible.

Archive.java in Junrar is affected by a denial of service vulnerability due to an infinite loop when handling corrupt RAR files.