CVE-2016-1505: Radicale Path Traversal Vulnerability

CRITICAL
Advisory Identifier: GHSA-84cw-mxhv-qvv4
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CVSS 10.0
CWE-22
Published
Advisory Summary

CVE-2016-1505 is a CRITICAL (CVSS 10.0) path traversal vulnerability (CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')) affecting Radicale libraries in the PyPI ecosystem. The issue involves radicale is vulnerable to directory traversal on windows filesystem storage backend component. Remediation is available by upgrading affected packages to version 1.1.

CVE-2016-1505 at a Glance

CVE Identifier CVE-2016-1505
GHSA Identifier GHSA-84cw-mxhv-qvv4
Severity CRITICAL
CVSS v3.1 Base Score 10.0
CWE Classification CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
Affected Product Radicale
Package Ecosystem PyPI
Published Date
Last Updated

Security Impact

CVSS: 10.0

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:C/C:H/I:H/A:N).

Attack Vector Network (AV:N)
Attack Complexity Low (AC:L)
Privileges Required None (PR:N)
User Interaction None (UI:N)
Scope Changed (S:C)
Confidentiality High (C:H)
Integrity High (I:H)
Availability None (A:N)

How to Fix CVE-2016-1505

To remediate this vulnerability, upgrade all affected Radicale dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.

Radicale fixed: 1.1 
pip install Radicale>=1.1
Verify Direct and Transitive Dependencies

Run the following command in your project directory to verify that all resolved dependencies use the patched release: 

pip show Radicale

How to Check if You Are Affected

To determine whether your Python environment is affected by CVE-2016-1505, inspect your installed packages using pip:

pip show Radicale

Analyze the terminal output to locate any version of Radicale in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 1.1), your application is affected.

Note: The pip show Radicale command checks currently installed packages in your active Python environment.

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 Radicale, 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

The filesystem storage backend in Radicale before 1.1 on Windows allows remote attackers to read or write to arbitrary files via a crafted path, as demonstrated by /c:/file/ignore.

CVE-2016-1505 Affected Radicale Versions

1 component(s)
Fixed Versions:
1.1
Product / Package Ecosystem Affected Versions Fixed Version
Radicale
pypi/Radicale
PyPI
< 1.1
1.1

References

NVD — CVE-2016-1505 NVD
https://nvd.nist.gov/vuln/detail/CVE-2016-1505
Radicale Source Repository REPOSITORY
https://github.com/Kozea/Radicale/pull/343
Security Fix Commit FIX COMMIT
https://github.com/Kozea/Radicale/commit/b4b3d51f33c7623d312f289252dd7bbb8f58bbe6
Radicale Source Repository REPOSITORY
https://github.com/Kozea/Radicale
Radicale Security Information SECURITY
http://www.openwall.com/lists/oss-security/2016/01/05/7
Radicale Security Information SECURITY
http://www.openwall.com/lists/oss-security/2016/01/06/4
Radicale Security Information SECURITY
http://www.openwall.com/lists/oss-security/2016/01/06/7
Radicale Security Information SECURITY
http://www.openwall.com/lists/oss-security/2016/01/07/7
Radicale Security Information SECURITY
http://www.securityfocus.com/bid/80255

Frequently Asked Questions

What is CVE-2016-1505?
CVE-2016-1505 is a security vulnerability in Radicale involving Radicale is vulnerable to directory traversal on Windows Filesystem Storage Backend component under CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal').
Which Radicale versions are affected?
Affected versions include releases prior to 1.1 across affected packages: Radicale.
What version fixes CVE-2016-1505?
Upgrading to 1.1 (or the latest patched release for your respective branch) resolves the vulnerability.
Is Radicale affected?
Yes, Radicale is affected in releases prior to 1.1. Upgrade your dependency to 1.1 or later.
What is the CVSS score of CVE-2016-1505?
CVE-2016-1505 has a CVSS v3.1 base score of 10.0 (CRITICAL) with vector string CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:N.
What CWE is associated with CVE-2016-1505?
CVE-2016-1505 is classified under CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal') (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.).
How can I check PyPI dependencies for CVE-2016-1505?
Run the dependency tree command: 'pip show Radicale'. This command lists direct and transitive dependencies in your build configuration so you can verify if a vulnerable version is resolved.
Machine-readable OSV JSON OSV v1.5 Schema
Normalized schema output
View Raw JSON 
{
  "schema_version" : "1.4.0",
  "id" : "GHSA-84cw-mxhv-qvv4",
  "modified" : "2023-08-02T22:33:28Z",
  "published" : "2022-05-17T03:43:03Z",
  "aliases" : [ "CVE-2016-1505" ],
  "summary" : "Radicale is vulnerable to directory traversal on Windows Filesystem Storage Backend component",
  "details" : "The filesystem storage backend in Radicale before 1.1 on Windows allows remote attackers to read or write to arbitrary files via a crafted path, as demonstrated by /c:/file/ignore.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:N"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "PyPI",
      "name" : "Radicale"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "1.1"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2016-1505"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/Kozea/Radicale/pull/343"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/Kozea/Radicale/commit/b4b3d51f33c7623d312f289252dd7bbb8f58bbe6"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/Kozea/Radicale"
  }, {
    "type" : "WEB",
    "url" : "http://www.openwall.com/lists/oss-security/2016/01/05/7"
  }, {
    "type" : "WEB",
    "url" : "http://www.openwall.com/lists/oss-security/2016/01/06/4"
  }, {
    "type" : "WEB",
    "url" : "http://www.openwall.com/lists/oss-security/2016/01/06/7"
  }, {
    "type" : "WEB",
    "url" : "http://www.openwall.com/lists/oss-security/2016/01/07/7"
  }, {
    "type" : "WEB",
    "url" : "http://www.securityfocus.com/bid/80255"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-22" ],
    "severity" : "CRITICAL",
    "github_reviewed" : true,
    "github_reviewed_at" : "2023-08-02T22:33:28Z",
    "nvd_published_at" : "2016-02-03T18:59:00Z"
  }
}