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GHSA-mx43-r985-5h4m

MediumCVSS 6.1 / 10
Published Dec 20, 2021·Last modified Nov 8, 2023
Affected Components(0)

No affected components available

Description

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.

Risk Scores
Base Score
6.1

The vulnerability can be exploited over the network without needing physical access. It is easy for an attacker to exploit this vulnerability. An attacker does not need any special privileges or access rights. The attacker needs the user to perform some action, like clicking a link. The vulnerability can affect other systems as well, not just the initial system. There is a low impact on the confidentiality of the information. There is a low impact on the integrity of the data.

Threat Intelligence
5.6

Exploitation attempts have been detected. Elevated vigilance and prompt remediation are advised.

EPSS
N/A

Probability that this vulnerability will be exploited in the wild within the next 30 days.

Exploit
Not available

We did not find any exploit available. Neither in GitHub repositories nor in the Exploit-Database.

Related Vulnerabilities
  • CVE-2020-12283
    Alias
  • EUVD-2021-2557
    Alias

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Medium severity
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