CVE-2015-4495

Mozilla Firefox Security Feature Bypass

8.8 HIGHActively exploited (CISA KEV)Public exploitEPSS 68.6%

Published7 Aug 2015
Added to CISA KEV25 May 2022
Remediation due15 Jun 2022

Description

The PDF reader in Mozilla Firefox before 39.0.3, Firefox ESR 38.x before 38.1.1, and Firefox OS before 2.2 allows remote attackers to bypass the Same Origin Policy, and read arbitrary files or gain privileges, via vectors involving crafted JavaScript code and a native setter, as exploited in the wild in August 2015.

CVSS 3.1 breakdown

Attack vectorNetwork

Attack complexityLow

Privileges requiredNone

User interactionRequired

ScopeUnchanged

ConfidentialityHigh

IntegrityHigh

AvailabilityHigh

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Affected products

Mozilla Firefox< 39.0.3 · ≥ 38.0 < 38.1.1

Suse Linux Enterprise Debuginfo11

Canonical Ubuntu Linux12.04 · 14.04 · 15.04

Mozilla Firefox OS< 2.2

Opensuse13.1 · 13.2

Oracle Solaris11.3

Redhat Enterprise Linux Desktop5.0 · 6.0 · 7.0

Redhat Enterprise Linux Eus6.7 · 7.1 · 7.2 · 7.3

Redhat Enterprise Linux Server5.0 · 6.0 · 7.0

Redhat Enterprise Linux Server Aus7.3 · 7.4 · 7.6 · 7.7

Redhat Enterprise Linux Server Tus7.3 · 7.6 · 7.7

Redhat Enterprise Linux Workstation5.0 · 6.0 · 7.0

Suse Linux Enterprise Desktop11 · 12

Suse Linux Enterprise Server11 · 12

Suse Linux Enterprise Software Development Kit11 · 12

Remediation

Fixed in

Mozilla Firefox≥ 39.0.3

Mozilla Firefox OS≥ 2.2

Patch & vendor advisories

References

http://lists.opensuse.org/opensuse-security-announce/2015-08/msg00009.htmlMailing ListThird Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2015-08/msg00010.htmlMailing ListThird Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2015-08/msg00014.htmlMailing ListThird Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2015-08/msg00015.htmlMailing ListThird Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2015-08/msg00021.htmlMailing ListThird Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2015-09/msg00016.htmlMailing ListThird Party Advisory
http://rhn.redhat.com/errata/RHSA-2015-1581.htmlThird Party Advisory
https://blog.mozilla.org/security/2015/08/06/firefox-exploit-found-in-the-wild/Issue TrackingVendor Advisory
https://bugzilla.mozilla.org/show_bug.cgi?id=1178058Issue Tracking
https://bugzilla.mozilla.org/show_bug.cgi?id=1179262Issue Tracking

and 8 more references

Related CVEs

Recent high-severity vulnerabilities sharing a weakness type.

Frequently asked

Is CVE-2015-4495 being actively exploited?

Yes. CVE-2015-4495 is listed in the CISA Known Exploited Vulnerabilities (KEV) catalog, added 25 May 2022.

How severe is CVE-2015-4495?

CVE-2015-4495 has a CVSS 3.1 base score of 8.8, rated high. EPSS estimates a 68.6% probability of exploitation.

Which products are affected by CVE-2015-4495?

Affected products include Mozilla Firefox, Suse Linux Enterprise Debuginfo, Canonical Ubuntu Linux, Mozilla Firefox OS, Opensuse, and 10 more.

How do I fix CVE-2015-4495?

Upgrade affected software to a fixed version, for example Mozilla Firefox 39.0.3, Mozilla Firefox OS 2.2 or later, then confirm no affected versions remain in your inventory.

How Secuno handles this

Secuno correlates vulnerabilities like CVE-2015-4495 against the real software inventory on every managed device, every day. Rather than a static severity, each match is scored in context: exploit availability, EPSS, the asset's exposure, and business criticality decide where it lands in the queue. Because it is on the CISA KEV list, Secuno flags any affected asset as top-priority automatically. If an affected version is present anywhere across your portfolio, it surfaces automatically with a prioritised remediation path.

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Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.