CVE-2020-10696: Github.com/containers/buildah Path Traversal Vulnerability

HIGH
Advisory Identifier: GHSA-fx8w-mjvm-hvpc
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CVSS 8.8
CWE-22
Published
Advisory Summary

CVE-2020-10696 is a HIGH (CVSS 8.8) path traversal vulnerability (CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')) affecting Github.com/containers/buildah libraries in the Go ecosystem. The issue involves path traversal in buildah. Remediation is available by upgrading affected packages to version 1.14.4.

CVE-2020-10696 at a Glance

CVE Identifier CVE-2020-10696
GHSA Identifier GHSA-fx8w-mjvm-hvpc
Severity HIGH
CVSS v3.1 Base Score 8.8
CWE Classification CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
Affected Product Github.com/containers/buildah
Package Ecosystem Go
Published Date
Last Updated

Security Impact

CVSS: 8.8

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:R/S:U/C:H/I:H/A:H).

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

How to Fix CVE-2020-10696

To remediate this vulnerability, upgrade all affected Github.com/containers/buildah 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/containers/buildah fixed: 1.14.4 
Upgrade github.com/containers/buildah to 1.14.4
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/containers/buildah

How to Check if You Are Affected

To determine whether your application is affected by CVE-2020-10696, inspect your project dependencies for Github.com/containers/buildah:

inspect dependencies for github.com/containers/buildah

Analyze the terminal output to locate any version of Github.com/containers/buildah in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 1.14.4), 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/containers/buildah, 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

A path traversal flaw was found in Buildah in versions before 1.14.5. This flaw allows an attacker to trick a user into building a malicious container image hosted on an HTTP(s) server and then write files to the user's system anywhere that the user has permissions. ### Specific Go Packages Affected github.com/containers/buildah/imagebuildah

CVE-2020-10696 Affected Github.com/containers/buildah Versions

1 component(s)
Fixed Versions:
1.14.4
Product / Package Ecosystem Affected Versions Fixed Version
github.com/containers/buildah
golang/github.com/containers/buildah
Go
< 1.14.4
1.14.4

References

NVD — CVE-2020-10696 NVD
https://nvd.nist.gov/vuln/detail/CVE-2020-10696
Github.com/containers/buildah Source Repository REPOSITORY
https://github.com/containers/buildah/pull/2245
Github.com/containers/buildah Security Information SECURITY
https://access.redhat.com/security/cve/cve-2020-10696
bugzilla.redhat.com/show_bug.cgi WEB
https://bugzilla.redhat.com/show_bug.cgi?id=1817651
bugzilla.redhat.com/show_bug.cgi WEB
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2020-10696
Github.com/containers/buildah Source Repository REPOSITORY
https://github.com/containers/buildah
pkg.go.dev/vuln/go-2022-0828 WEB
https://pkg.go.dev/vuln/GO-2022-0828

Frequently Asked Questions

What is CVE-2020-10696?
CVE-2020-10696 is a security vulnerability in Github.com/containers/buildah involving Path Traversal in Buildah under CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal').
Which Github.com/containers/buildah versions are affected?
Affected versions include releases prior to 1.14.4 across affected packages: github.com/containers/buildah.
What version fixes CVE-2020-10696?
Upgrading to 1.14.4 (or the latest patched release for your respective branch) resolves the vulnerability.
Is github.com/containers/buildah affected?
Yes, github.com/containers/buildah is affected in releases prior to 1.14.4. Upgrade your dependency to 1.14.4 or later.
What is the CVSS score of CVE-2020-10696?
CVE-2020-10696 has a CVSS v3.1 base score of 8.8 (HIGH) with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.
What CWE is associated with CVE-2020-10696?
CVE-2020-10696 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-2020-10696?
Run the dependency tree command: 'inspect dependencies for github.com/containers/buildah'. 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-fx8w-mjvm-hvpc",
  "modified" : "2024-12-12T22:24:13Z",
  "published" : "2021-05-18T18:32:41Z",
  "aliases" : [ "CVE-2020-10696" ],
  "summary" : "Path Traversal in Buildah",
  "details" : "A path traversal flaw was found in Buildah in versions before 1.14.5. This flaw allows an attacker to trick a user into building a malicious container image hosted on an HTTP(s) server and then write files to the user's system anywhere that the user has permissions.\n\n### Specific Go Packages Affected\ngithub.com/containers/buildah/imagebuildah",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "Go",
      "name" : "github.com/containers/buildah"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "1.14.4"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2020-10696"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/containers/buildah/pull/2245"
  }, {
    "type" : "WEB",
    "url" : "https://access.redhat.com/security/cve/cve-2020-10696"
  }, {
    "type" : "WEB",
    "url" : "https://bugzilla.redhat.com/show_bug.cgi?id=1817651"
  }, {
    "type" : "WEB",
    "url" : "https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2020-10696"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/containers/buildah"
  }, {
    "type" : "WEB",
    "url" : "https://pkg.go.dev/vuln/GO-2022-0828"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-22" ],
    "severity" : "HIGH",
    "github_reviewed" : true,
    "github_reviewed_at" : "2021-05-07T17:31:16Z",
    "nvd_published_at" : null
  }
}