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CVE-2009-3987

7.8 · HIGH

The GeckoActiveXObject function in Mozilla Firefox before 3.0.16 and 3.5.x before 3.5.6, and SeaMonkey before 2.0.1, generates different exception messages depending on whether the referenced COM o…

Published Dec 17, 2009mozillaCWE-200EPSS 1.62%

Overview

CVE-2009-3987 is a high-severity vulnerability affecting mozilla firefox. It was published on December 17, 2009 and has a CVSS 2.0 base score of 7.8 (HIGH).

This vulnerability has a CVSS 2.0 base score of 7.8, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

Technical description

The GeckoActiveXObject function in Mozilla Firefox before 3.0.16 and 3.5.x before 3.5.6, and SeaMonkey before 2.0.1, generates different exception messages depending on whether the referenced COM object is listed in the registry, which allows remote attackers to obtain potentially sensitive information about installed software by making multiple calls that specify the ProgID values of different COM objects.

Remediation

Check the references section for vendor advisories and patches from mozilla. Update firefox to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

Affected products

VendorProductVersionsStatus
mozillafirefox0Affected
mozillaseamonkey0Affected

References

Refsecunia.com/advisories/37699Refsecunia.com/advisories/37785Refsecuritytracker.com/id?1023346Refsecuritytracker.com/id?1023347Refwww.mozilla.org/security/announce/2009/mfsa2009-71.htmlRefwww.securityfocus.com/bid/37349Refwww.securityfocus.com/bid/37360Refwww.vupen.com/english/advisories/2009/3547Refbugzilla.mozilla.org/show_bug.cgi?id=503451Refbugzilla.redhat.com/show_bug.cgi?id=546729

How CyberStrike helps

Frequently asked questions

What is CVE-2009-3987?

CVE-2009-3987 is a high-severity vulnerability affecting mozilla firefox. It was published on December 17, 2009 and has a CVSS 2.0 base score of 7.8 (HIGH).

How severe is CVE-2009-3987?

This vulnerability has a CVSS 2.0 base score of 7.8, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2009-3987?

Check the references section for vendor advisories and patches from mozilla. Update firefox to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2009-3987?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2009-3987 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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