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CVE-2015-4487

7.5 · HIGH

The nsTSubstring::ReplacePrep function in Mozilla Firefox before 40.0, Firefox ESR 38.x before 38.2, and Firefox OS before 2.2 might allow remote attackers to cause a denial of service (memory corr…

Published Aug 16, 2015mozillaCWE-119EPSS 3.82%

Overview

CVE-2015-4487 is a high-severity vulnerability affecting mozilla firefox. It was published on August 16, 2015 and has a CVSS 2.0 base score of 7.5 (HIGH).

This vulnerability has a CVSS 2.0 base score of 7.5, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

Technical description

The nsTSubstring::ReplacePrep function in Mozilla Firefox before 40.0, Firefox ESR 38.x before 38.2, and Firefox OS before 2.2 might allow remote attackers to cause a denial of service (memory corruption) or possibly have unspecified other impact via unknown vectors, related to an "overflow."

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
mozillafirefox_os0Affected

References

Reflists.opensuse.org/opensuse-security-announce/2015-08/msg00014.htmlReflists.opensuse.org/opensuse-security-announce/2015-08/msg00015.htmlReflists.opensuse.org/opensuse-security-announce/2015-08/msg00021.htmlReflists.opensuse.org/opensuse-security-announce/2015-09/msg00016.htmlReflists.opensuse.org/opensuse-security-announce/2015-11/msg00025.htmlReflists.opensuse.org/opensuse-updates/2015-08/msg00030.htmlReflists.opensuse.org/opensuse-updates/2015-08/msg00031.htmlRefrhn.redhat.com/errata/RHSA-2015-1586.htmlRefrhn.redhat.com/errata/RHSA-2015-1682.htmlRefwww.debian.org/security/2015/dsa-3333

How CyberStrike helps

Frequently asked questions

What is CVE-2015-4487?

CVE-2015-4487 is a high-severity vulnerability affecting mozilla firefox. It was published on August 16, 2015 and has a CVSS 2.0 base score of 7.5 (HIGH).

How severe is CVE-2015-4487?

This vulnerability has a CVSS 2.0 base score of 7.5, 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-2015-4487?

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-2015-4487?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2015-4487 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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