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Vulnerability record · CVE-2015-4487 · published 16 August 2015

CVE-2015-4487: Mozilla firefox memory buffer overflow vulnerability

Mozilla · Firefox

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."

7.5 CVSS 2.0 High EPSS 3.8% · top 10.3% CWE-119 · Memory buffer overflow
7.5CVSS 2.0 base score
3.8%EPSS exploitation probability, 30 days
NoNot in CISA KEV
5Affected product versions listed by NVD
42References
17 Jun 2026Last modified by NVD

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."

AV:N/AC:L/Au:N/C:P/I:P/A:P

Affected products

5 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
http://lists.opensuse.org/opensuse-security-announce/2015-08/msg00014.html Third Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2015-08/msg00015.html Third Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2015-08/msg00021.html
http://lists.opensuse.org/opensuse-security-announce/2015-09/msg00016.html
http://lists.opensuse.org/opensuse-security-announce/2015-11/msg00025.html
http://lists.opensuse.org/opensuse-updates/2015-08/msg00030.html
http://lists.opensuse.org/opensuse-updates/2015-08/msg00031.html
http://rhn.redhat.com/errata/RHSA-2015-1586.html
http://rhn.redhat.com/errata/RHSA-2015-1682.html
http://www.debian.org/security/2015/dsa-3333
http://www.debian.org/security/2015/dsa-3410
http://www.mozilla.org/security/announce/2015/mfsa2015-90.html Vendor Advisory
http://www.oracle.com/technetwork/topics/security/bulletinapr2016-2952098.html Third Party Advisory
http://www.securitytracker.com/id/1033247
http://www.securitytracker.com/id/1033372
http://www.ubuntu.com/usn/USN-2702-1 Third Party Advisory
http://www.ubuntu.com/usn/USN-2702-2 Third Party Advisory
http://www.ubuntu.com/usn/USN-2702-3
http://www.ubuntu.com/usn/USN-2712-1
https://bugzilla.mozilla.org/show_bug.cgi?id=1171603 Issue Tracking
https://security.gentoo.org/glsa/201605-06
http://lists.opensuse.org/opensuse-security-announce/2015-08/msg00014.html Third Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2015-08/msg00015.html Third Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2015-08/msg00021.html
http://lists.opensuse.org/opensuse-security-announce/2015-09/msg00016.html
http://lists.opensuse.org/opensuse-security-announce/2015-11/msg00025.html
http://lists.opensuse.org/opensuse-updates/2015-08/msg00030.html
http://lists.opensuse.org/opensuse-updates/2015-08/msg00031.html
http://rhn.redhat.com/errata/RHSA-2015-1586.html
http://rhn.redhat.com/errata/RHSA-2015-1682.html
http://www.debian.org/security/2015/dsa-3333
http://www.debian.org/security/2015/dsa-3410
http://www.mozilla.org/security/announce/2015/mfsa2015-90.html Vendor Advisory
http://www.oracle.com/technetwork/topics/security/bulletinapr2016-2952098.html Third Party Advisory
http://www.securitytracker.com/id/1033247
http://www.securitytracker.com/id/1033372
http://www.ubuntu.com/usn/USN-2702-1 Third Party Advisory
http://www.ubuntu.com/usn/USN-2702-2 Third Party Advisory
http://www.ubuntu.com/usn/USN-2702-3
http://www.ubuntu.com/usn/USN-2712-1

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Source: NIST National Vulnerability Database (record CVE-2015-4487), CISA KEV, FIRST EPSS (scores of 2026-09-29). This page is refreshed as NVD updates the record.