CVE-2020-36561: Github.com/yi ge/unzip Path Traversal Vulnerability

CRITICAL
Advisory Identifier: GHSA-f5c5-hmw9-v8hx
Share
CVSS 9.1
CWE-22
Published
Advisory Summary

CVE-2020-36561 is a CRITICAL (CVSS 9.1) path traversal vulnerability (CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')) affecting Github.com/yi ge/unzip libraries in the Go ecosystem. The issue involves unzip vulnerable to path traversal. Remediation is available by upgrading affected packages to version 1.0.3-0.20200308084313-2adbaa4891b9.

CVE-2020-36561 at a Glance

CVE Identifier CVE-2020-36561
GHSA Identifier GHSA-f5c5-hmw9-v8hx
Severity CRITICAL
CVSS v3.1 Base Score 9.1
CWE Classification CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
Affected Product Github.com/yi ge/unzip
Package Ecosystem Go
Published Date
Last Updated

Security Impact

CVSS: 9.1

The security impact metrics below are parsed directly from the CVSS v3.1 vector string (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H).

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

How to Fix CVE-2020-36561

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

github.com/yi-ge/unzip fixed: 1.0.3-0.20200308084313-2adbaa4891b9 
Upgrade github.com/yi-ge/unzip to 1.0.3-0.20200308084313-2adbaa4891b9
Verify Direct and Transitive Dependencies

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

inspect dependencies for github.com/yi-ge/unzip

How to Check if You Are Affected

To determine whether your application is affected by CVE-2020-36561, inspect your project dependencies for Github.com/yi ge/unzip:

inspect dependencies for github.com/yi-ge/unzip

Analyze the terminal output to locate any version of Github.com/yi ge/unzip in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 1.0.3-0.20200308084313-2adbaa4891b9), your application is affected.

Note: Verify declared build manifests and deployed runtime container environments.

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 Github.com/yi ge/unzip, 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

Due to improper path sanitization, archives containing relative file paths can cause files to be written (or overwritten) outside of the target directory.

CVE-2020-36561 Affected Github.com/yi ge/unzip Versions

1 component(s)
Fixed Versions:
1.0.3-0.20200308084313-2adbaa4891b9
Product / Package Ecosystem Affected Versions Fixed Version
github.com/yi-ge/unzip
golang/github.com/yi-ge/unzip
Go
< 1.0.3-0.20200308084313-2adbaa4891b9
1.0.3-0.20200308084313-2adbaa4891b9

References

NVD — CVE-2020-36561 NVD
https://nvd.nist.gov/vuln/detail/CVE-2020-36561
Github.com/yi ge/unzip Source Repository REPOSITORY
https://github.com/yi-ge/unzip/pull/1
Security Fix Commit FIX COMMIT
https://github.com/yi-ge/unzip/commit/2adbaa4891b9690853ef10216189189f5ad7dc73
Github.com/yi ge/unzip Source Repository REPOSITORY
https://github.com/yi-ge/unzip
pkg.go.dev/vuln/go-2020-0035 WEB
https://pkg.go.dev/vuln/GO-2020-0035
snyk.io/research/zip-slip-v... WEB
https://snyk.io/research/zip-slip-vulnerability

Frequently Asked Questions

What is CVE-2020-36561?
CVE-2020-36561 is a security vulnerability in Github.com/yi ge/unzip involving Unzip vulnerable to path traversal under CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal').
Which Github.com/yi ge/unzip versions are affected?
Affected versions include releases prior to 1.0.3-0.20200308084313-2adbaa4891b9 across affected packages: github.com/yi-ge/unzip.
What version fixes CVE-2020-36561?
Upgrading to 1.0.3-0.20200308084313-2adbaa4891b9 (or the latest patched release for your respective branch) resolves the vulnerability.
Is github.com/yi-ge/unzip affected?
Yes, github.com/yi-ge/unzip is affected in releases prior to 1.0.3-0.20200308084313-2adbaa4891b9. Upgrade your dependency to 1.0.3-0.20200308084313-2adbaa4891b9 or later.
What is the CVSS score of CVE-2020-36561?
CVE-2020-36561 has a CVSS v3.1 base score of 9.1 (CRITICAL) with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H.
What CWE is associated with CVE-2020-36561?
CVE-2020-36561 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 Go dependencies for CVE-2020-36561?
Run the dependency tree command: 'inspect dependencies for github.com/yi-ge/unzip'. 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-f5c5-hmw9-v8hx",
  "modified" : "2023-08-30T11:48:44Z",
  "published" : "2022-12-28T00:30:23Z",
  "aliases" : [ "CVE-2020-36561" ],
  "summary" : "Unzip vulnerable to path traversal",
  "details" : "Due to improper path sanitization, archives containing relative file paths can cause files to be written (or overwritten) outside of the target directory.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "Go",
      "name" : "github.com/yi-ge/unzip"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "1.0.3-0.20200308084313-2adbaa4891b9"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2020-36561"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/yi-ge/unzip/pull/1"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/yi-ge/unzip/commit/2adbaa4891b9690853ef10216189189f5ad7dc73"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/yi-ge/unzip"
  }, {
    "type" : "WEB",
    "url" : "https://pkg.go.dev/vuln/GO-2020-0035"
  }, {
    "type" : "WEB",
    "url" : "https://snyk.io/research/zip-slip-vulnerability"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-22" ],
    "severity" : "CRITICAL",
    "github_reviewed" : true,
    "github_reviewed_at" : "2022-12-30T19:07:02Z",
    "nvd_published_at" : "2022-12-27T22:15:00Z"
  }
}