CVE-2020-7667: Github.com/sassoftware/go rpmutils Github.com/sassoftware/go-rpmutils Arbitrary File Write Vulnerability

HIGH
Advisory Identifier: GHSA-9423-6c93-gpp8
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CVSS 7.5
CWE-22
Published
Advisory Summary

CVE-2020-7667 is a HIGH (CVSS 7.5) github.com/sassoftware/go-rpmutils arbitrary file write vulnerability (CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')) affecting Github.com/sassoftware/go rpmutils libraries in the Go ecosystem. The issue involves github.com/sassoftware/go-rpmutils arbitrary file write via archive extraction (zip slip). Remediation is available by upgrading affected packages to version 0.1.0.

CVE-2020-7667 at a Glance

CVE Identifier CVE-2020-7667
GHSA Identifier GHSA-9423-6c93-gpp8
Severity HIGH
CVSS v3.1 Base Score 7.5
CWE Classification CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
Affected Product Github.com/sassoftware/go rpmutils
Package Ecosystem Go
Published Date
Last Updated

Security Impact

CVSS: 7.5

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:N).

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 None (A:N)

How to Fix CVE-2020-7667

To remediate this vulnerability, upgrade all affected Github.com/sassoftware/go rpmutils 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/sassoftware/go-rpmutils fixed: 0.1.0 
Upgrade github.com/sassoftware/go-rpmutils to 0.1.0
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/sassoftware/go-rpmutils

How to Check if You Are Affected

To determine whether your application is affected by CVE-2020-7667, inspect your project dependencies for Github.com/sassoftware/go rpmutils:

inspect dependencies for github.com/sassoftware/go-rpmutils

Analyze the terminal output to locate any version of Github.com/sassoftware/go rpmutils in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 0.1.0), 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/sassoftware/go rpmutils, 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 CPIO extraction functionality doesn't sanitize the paths of the archived files for leading and non-leading `..` which leads in file extraction outside of the current directory. Note, the fixing commit was applied to all affected versions which were re-released.

CVE-2020-7667 Affected Github.com/sassoftware/go rpmutils Versions

1 component(s)
Fixed Versions:
0.1.0
Product / Package Ecosystem Affected Versions Fixed Version
github.com/sassoftware/go-rpmutils
golang/github.com/sassoftware/go-rpmutils
Go
< 0.1.0
0.1.0

References

NVD — CVE-2020-7667 NVD
https://nvd.nist.gov/vuln/detail/CVE-2020-7667
Security Fix Commit FIX COMMIT
https://github.com/sassoftware/go-rpmutils/commit/a64058cf21b8aada501bba923c9aab66fb6febf0
Github.com/sassoftware/go rpmutils Source Repository REPOSITORY
https://github.com/sassoftware/go-rpmutils
pkg.go.dev/vuln/go-2020-0042 WEB
https://pkg.go.dev/vuln/GO-2020-0042
snyk.io/research/zip-slip-v... WEB
https://snyk.io/research/zip-slip-vulnerability
snyk.io/vuln/snyk-golang-gi... WEB
https://snyk.io/vuln/SNYK-GOLANG-GITHUBCOMSASSOFTWAREGORPMUTILSCPIO-570427

Frequently Asked Questions

What is CVE-2020-7667?
CVE-2020-7667 is a security vulnerability in Github.com/sassoftware/go rpmutils involving github.com/sassoftware/go-rpmutils Arbitrary File Write via Archive Extraction (Zip Slip) under CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal').
Which Github.com/sassoftware/go rpmutils versions are affected?
Affected versions include releases prior to 0.1.0 across affected packages: github.com/sassoftware/go-rpmutils.
What version fixes CVE-2020-7667?
Upgrading to 0.1.0 (or the latest patched release for your respective branch) resolves the vulnerability.
Is github.com/sassoftware/go-rpmutils affected?
Yes, github.com/sassoftware/go-rpmutils is affected in releases prior to 0.1.0. Upgrade your dependency to 0.1.0 or later.
What is the CVSS score of CVE-2020-7667?
CVE-2020-7667 has a CVSS v3.1 base score of 7.5 (HIGH) with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N.
What CWE is associated with CVE-2020-7667?
CVE-2020-7667 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-2020-7667?
Run the dependency tree command: 'inspect dependencies for github.com/sassoftware/go-rpmutils'. 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-9423-6c93-gpp8",
  "modified" : "2023-08-29T23:36:50Z",
  "published" : "2021-06-23T17:13:29Z",
  "aliases" : [ "CVE-2020-7667" ],
  "summary" : "github.com/sassoftware/go-rpmutils Arbitrary File Write via Archive Extraction (Zip Slip)",
  "details" : "The CPIO extraction functionality doesn't sanitize the paths of the archived files for leading and non-leading `..` which leads in file extraction outside of the current directory. Note, the fixing commit was applied to all affected versions which were re-released.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "Go",
      "name" : "github.com/sassoftware/go-rpmutils"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "0.1.0"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2020-7667"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/sassoftware/go-rpmutils/commit/a64058cf21b8aada501bba923c9aab66fb6febf0"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/sassoftware/go-rpmutils"
  }, {
    "type" : "WEB",
    "url" : "https://pkg.go.dev/vuln/GO-2020-0042"
  }, {
    "type" : "WEB",
    "url" : "https://snyk.io/research/zip-slip-vulnerability"
  }, {
    "type" : "WEB",
    "url" : "https://snyk.io/vuln/SNYK-GOLANG-GITHUBCOMSASSOFTWAREGORPMUTILSCPIO-570427"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-22" ],
    "severity" : "HIGH",
    "github_reviewed" : true,
    "github_reviewed_at" : "2021-05-12T14:56:04Z",
    "nvd_published_at" : "2020-06-24T12:15:00Z"
  }
}