From 4ba8f67c919a80e9f7d351db32698a2b2a11ee96 Mon Sep 17 00:00:00 2001 From: Jonathan Leitschuh Date: Fri, 29 Jul 2022 13:25:19 +0000 Subject: [PATCH] vuln-fix: Partial Path Traversal Vulnerability This fixes a partial path traversal vulnerability. Replaces `dir.getCanonicalPath().startsWith(parent.getCanonicalPath())`, which is vulnerable to partial path traversal attacks, with the more secure `dir.getCanonicalFile().toPath().startsWith(parent.getCanonicalFile().toPath())`. To demonstrate this vulnerability, consider `"/usr/outnot".startsWith("/usr/out")`. The check is bypassed although `/outnot` is not under the `/out` directory. It's important to understand that the terminating slash may be removed when using various `String` representations of the `File` object. For example, on Linux, `println(new File("/var"))` will print `/var`, but `println(new File("/var", "/")` will print `/var/`; however, `println(new File("/var", "/").getCanonicalPath())` will print `/var`. Weakness: CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal') Severity: Medium CVSSS: 6.1 Detection: CodeQL & OpenRewrite (https://public.moderne.io/recipes/org.openrewrite.java.security.PartialPathTraversalVulnerability) Reported-by: Jonathan Leitschuh Signed-off-by: Jonathan Leitschuh Bug-tracker: https://github.com/JLLeitschuh/security-research/issues/13 Co-authored-by: Moderne --- .../java/org/apache/ibatis/migration/commands/BaseCommand.java | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/src/main/java/org/apache/ibatis/migration/commands/BaseCommand.java b/src/main/java/org/apache/ibatis/migration/commands/BaseCommand.java index 7efdbe21..e24a427d 100644 --- a/src/main/java/org/apache/ibatis/migration/commands/BaseCommand.java +++ b/src/main/java/org/apache/ibatis/migration/commands/BaseCommand.java @@ -238,7 +238,7 @@ private ClassLoader getDriverClassLoader() { if (files != null) { for (File file : files) { String filename = file.getCanonicalPath(); - if (!filename.startsWith("/")) { + if (!file.getCanonicalFile().toPath().startsWith("/")) { filename = "/" + filename; } urlList.add(new URL("jar:file:" + filename + "!/"));