Improved Host Header Security in Mozilla Geckodriver
CVE-2021-4138

5.3MEDIUM

Key Information:

Vendor

Mozilla
Status
Geckodriver
Vendor
CVE Published:
2 May 2022

What is CVE-2021-4138?

This vulnerability arises from inadequate validation of Host headers in Mozilla Geckodriver. It allows attackers to make requests using malicious host headers, potentially exposing the application to security risks. To mitigate this, Mozilla has improved host header checks to reject requests that are not directed to a known local hostname or IP address, or the hostname specified by the server.

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Deploy the Patch

Affected Version(s)

geckodriver < 0.30.0

References

https://github.com/mozilla/geckodriver/releases/tag/v0.30.0
x_refsource_MISC
https://bugzilla.mozilla.org/show_bug.cgi?id=1652612
x_refsource_MISC

CVSS V3.1

Score:
5.3
Severity:
MEDIUM
Confidentiality:
None
Integrity:
Low
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

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