GHSA-MX43-R985-5H4M

Vulnerability from github – Published: 2021-12-20 18:12 – Updated: 2023-10-02 14:32
VLAI?
Summary
Open redirect vulnerability in Sourcegraph
Details

Impact

An open redirect vulnerability that allows users to be targeted for phishing attacks has been found in Sourcegraph instances configured with OAuth, OpenID, or SAML authentication enabled. Users targeted by these phishing attacks could have their authentication tokens silently harvested by an attacker.

Specific Go Packages Affected

github.com/sourcegraph/sourcegraph/cmd/frontend/auth

Resolution

Sourcegraph v3.14.4 and v3.15.1 have been released which resolve the vulnerability. (associated change)

Workarounds

Disabling OAuth, OpenID and/or SAML sign-in options until upgraded to the patched versions will secure Sourcegraph / workaround the issue.

Timeline

  • Apr 23, 8 AM PST: GitHub Security Lab reported the issue to Sourcegraph.
  • Apr 23, 11 PM PST: A Sourcegraph engineer proposed a resolution for the vulnerability. https://github.com/sourcegraph/sourcegraph/pull/10167
  • Apr 24, 3 AM PST: The proposed resolution was reviewed, approved, and merged.
  • Apr 28, 2 PM PST: Patch releases for 3.14.4 and 3.15.1 were published.
  • Apr 29, 10 PM PST: Mitre publicly disclosed CVE-2020-12283.
  • Apr 30, 11 AM PST: Sourcegraph issued a GitHub security advisory and notified all affected users.

References

For more information

If you have any questions or comments about this advisory, please contact us at support@sourcegraph.com and include CVE-2020-12283 in the title.

Severity ?
6.1 (Medium)
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
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{
  "affected": [
    {
      "package": {
        "ecosystem": "Go",
        "name": "github.com/sourcegraph/sourcegraph"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "3.14.4"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Go",
        "name": "github.com/sourcegraph/sourcegraph"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "3.15.0"
            },
            {
              "fixed": "3.15.1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2020-12283"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-601"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2021-05-24T21:06:22Z",
    "nvd_published_at": null,
    "severity": "MODERATE"
  },
  "details": "### Impact\n\nAn open redirect vulnerability that allows users to be targeted for phishing attacks has been found in Sourcegraph instances configured with OAuth, OpenID, or SAML authentication enabled. Users targeted by these phishing attacks could have their authentication tokens silently harvested by an attacker.\n\n### Specific Go Packages Affected\ngithub.com/sourcegraph/sourcegraph/cmd/frontend/auth\n\n### Resolution\n\nSourcegraph v3.14.4 and v3.15.1 have been released which resolve the vulnerability. ([associated change](https://github.com/sourcegraph/sourcegraph/pull/10167))\n\n### Workarounds\n\nDisabling OAuth, OpenID and/or SAML sign-in options until upgraded to the patched versions will secure Sourcegraph / workaround the issue.\n\n### Timeline\n\n- Apr 23, 8 AM PST: GitHub Security Lab reported the issue to Sourcegraph.\n- Apr 23, 11 PM PST: A Sourcegraph engineer proposed a resolution for the vulnerability. https://github.com/sourcegraph/sourcegraph/pull/10167\n- Apr 24, 3 AM PST: The proposed resolution was reviewed, approved, and merged.\n- Apr 28, 2 PM PST: Patch releases for 3.14.4 and 3.15.1 were published.\n- Apr 29, 10 PM PST: Mitre publicly disclosed [CVE-2020-12283](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-12283).\n- Apr 30, 11 AM PST: Sourcegraph issued a GitHub security advisory and notified all affected users.\n\n### References\n\n- [Mitre: CVE-2020-12283](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-12283)\n- [GitHub Security Lab: GHSL-2020-085](https://securitylab.github.com/advisories/GHSL-2020-085-sourcegraph)\n- [detectify\u0027s blog post on open redirect vulnerabilities\n](https://blog.detectify.com/2019/05/16/the-real-impact-of-an-open-redirect/)\n\n### For more information\n\nIf you have any questions or comments about this advisory, please contact us at [support@sourcegraph.com](mailto:support@sourcegraph.com) and include `CVE-2020-12283` in the title.",
  "id": "GHSA-mx43-r985-5h4m",
  "modified": "2023-10-02T14:32:06Z",
  "published": "2021-12-20T18:12:47Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/sourcegraph/sourcegraph/security/advisories/GHSA-mx43-r985-5h4m"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2020-12283"
    },
    {
      "type": "WEB",
      "url": "https://github.com/sourcegraph/sourcegraph/pull/10167"
    },
    {
      "type": "WEB",
      "url": "https://github.com/sourcegraph/sourcegraph/commit/c0f48172e815c7f66471a38f0a06d1fc32a77a64"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/sourcegraph/sourcegraph"
    },
    {
      "type": "WEB",
      "url": "https://github.com/sourcegraph/sourcegraph/blob/master/CHANGELOG.md"
    },
    {
      "type": "WEB",
      "url": "https://github.com/sourcegraph/sourcegraph/compare/v3.15.0...v3.15.1"
    },
    {
      "type": "ADVISORY",
      "url": "https://securitylab.github.com/advisories/GHSL-2020-085-sourcegraph"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N",
      "type": "CVSS_V3"
    }
  ],
  "summary": "Open redirect vulnerability in Sourcegraph"
}


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  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
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  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



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