CVE-2018-1000850: Retrofit Path Traversal Vulnerability
HIGHCVE-2018-1000850 is a HIGH (CVSS 7.5) path traversal vulnerability (CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')) affecting Retrofit libraries in the Maven ecosystem. The issue involves directory traversal vulnerability in square retrofit. Remediation is available by upgrading affected packages to version 2.5.0.
CVE-2018-1000850 at a Glance
Security Impact
CVSS: 7.5
The security impact metrics below are parsed directly from the CVSS v3.1 vector string (CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N).
How to Fix CVE-2018-1000850
To remediate this vulnerability, upgrade all affected Retrofit dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.
<dependency>
<groupId>com.squareup.retrofit2</groupId>
<artifactId>retrofit</artifactId>
<version>2.5.0</version>
</dependency>Run the following command in your project directory to verify that all resolved dependencies use the patched release:
mvn dependency:tree -Dincludes=com.squareup.retrofit2How to Check if You Are Affected
To determine whether your Java application is affected by CVE-2018-1000850, inspect your build dependencies using the Maven Dependency Plugin:
mvn dependency:tree -Dincludes=com.squareup.retrofit2Analyze the terminal output to locate any version of Retrofit in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 2.5.0), your application is affected.
Note: The mvn dependency:tree -Dincludes=com.squareup.retrofit2 command inspects the resolved dependency graph declared in your project's POM files; it does not perform automated security scanning or inspect runtime dynamic classpaths. Always verify runtime container classpaths and shaded JARs.
Technical Details
Vulnerability Mechanism & Technical Analysis
This vulnerability is classified under CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal'), where the product uses external input to construct a pathname that is intended to identify a file or directory that is located underneath a restricted parent directory, but the product does not properly neutralize special elements within the pathname that can cause the pathname to resolve to a location that is outside of the restricted directory. In Retrofit, software state validation or input boundaries are circumvented during processing. Review the official source advisory statement below for specific affected components, classes, and reproduction details.
Source Advisory Statement
CVE-2018-1000850 Affected Retrofit Versions
1 component(s)| Product / Package | Ecosystem | Affected Versions | Fixed Version |
|---|---|---|---|
|
com.squareup.retrofit2:retrofit
|
Maven |
≥ 2.0.0
< 2.5.0
|
2.5.0
|
References
Frequently Asked Questions
What is CVE-2018-1000850?
Which Retrofit versions are affected?
What version fixes CVE-2018-1000850?
Is retrofit affected?
What is the CVSS score of CVE-2018-1000850?
What CWE is associated with CVE-2018-1000850?
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Machine-readable OSV JSON
OSV v1.5 Schema
{
"schema_version" : "1.4.0",
"id" : "GHSA-8p8g-f9vg-r7xr",
"modified" : "2022-09-14T22:25:15Z",
"published" : "2018-12-21T17:48:19Z",
"aliases" : [ "CVE-2018-1000850" ],
"summary" : "Directory Traversal vulnerability in Square Retrofit",
"details" : "Square Retrofit versions from (including) 2.0 to 2.5.0 (excluding) contain a Directory Traversal vulnerability in RequestBuilder class, method addPathParameter. By manipulating the URL an attacker could add or delete resources otherwise unavailable to her. This attack appears to be exploitable via an encoded path parameter on POST, PUT or DELETE request. This vulnerability appears to have been fixed in 2.5.0 and later.",
"severity" : [ {
"type" : "CVSS_V3",
"score" : "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N"
} ],
"affected" : [ {
"package" : {
"ecosystem" : "Maven",
"name" : "com.squareup.retrofit2:retrofit"
},
"ranges" : [ {
"type" : "ECOSYSTEM",
"events" : [ {
"introduced" : "2.0.0"
}, {
"fixed" : "2.5.0"
} ]
} ]
} ],
"references" : [ {
"type" : "ADVISORY",
"url" : "https://nvd.nist.gov/vuln/detail/CVE-2018-1000850"
}, {
"type" : "WEB",
"url" : "https://github.com/square/retrofit/commit/b9a7f6ad72073ddd40254c0058710e87a073047d#diff-943ec7ed35e68201824904d1dc0ec982"
}, {
"type" : "WEB",
"url" : "https://access.redhat.com/errata/RHSA-2019:3892"
}, {
"type" : "ADVISORY",
"url" : "https://github.com/advisories/GHSA-8p8g-f9vg-r7xr"
}, {
"type" : "PACKAGE",
"url" : "https://github.com/square/retrofit"
}, {
"type" : "WEB",
"url" : "https://github.com/square/retrofit/blob/master/CHANGELOG.md"
}, {
"type" : "WEB",
"url" : "https://ihacktoprotect.com/post/retrofit-path-traversal"
}, {
"type" : "WEB",
"url" : "https://lists.apache.org/thread.html/519eb0fd45642dcecd9ff74cb3e71c20a4753f7d82e2f07864b5108f@%3Cdev.drill.apache.org%3E"
}, {
"type" : "WEB",
"url" : "https://lists.apache.org/thread.html/b0656d359c7d40ec9f39c8cc61bca66802ef9a2a12ee199f5b0c1442@%3Cdev.drill.apache.org%3E"
}, {
"type" : "WEB",
"url" : "https://lists.apache.org/thread.html/f9bc3e55f4e28d1dcd1a69aae6d53e609a758e34d2869b4d798e13cc@%3Cissues.drill.apache.org%3E"
} ],
"database_specific" : {
"cwe_ids" : [ "CWE-22" ],
"severity" : "HIGH",
"github_reviewed" : true,
"github_reviewed_at" : "2020-06-16T21:26:16Z",
"nvd_published_at" : null
}
}