Vulnerability Details : CVE-2015-4518
The Reader View implementation in Mozilla Firefox before 42.0 has an improper whitelist, which makes it easier for remote attackers to bypass the Content Security Policy (CSP) protection mechanism and conduct cross-site scripting (XSS) attacks via vectors involving SVG animations and the about:reader URL.
Vulnerability category: Cross site scripting (XSS)
Products affected by CVE-2015-4518
- cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:*
Exploit prediction scoring system (EPSS) score for CVE-2015-4518
0.31%
Probability of exploitation activity in the next 30 days
EPSS Score History
~ 70 %
Percentile, the proportion of vulnerabilities that are scored at or less
CVSS scores for CVE-2015-4518
| Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source | First Seen |
|---|---|---|---|---|---|---|
|
4.3
|
MEDIUM | AV:N/AC:M/Au:N/C:N/I:P/A:N |
8.6
|
2.9
|
NIST |
CWE ids for CVE-2015-4518
-
The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users.Assigned by: nvd@nist.gov (Primary)
References for CVE-2015-4518
-
http://www.ubuntu.com/usn/USN-2785-1
USN-2785-1: Firefox vulnerabilities | Ubuntu security notices
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https://security.gentoo.org/glsa/201512-10
Mozilla Products: Multiple vulnerabilities (GLSA 201512-10) — Gentoo security
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http://www.oracle.com/technetwork/topics/security/bulletinapr2016-2952098.html
Oracle Solaris Bulletin - April 2016
-
http://www.securitytracker.com/id/1034069
Mozilla Firefox Multiple Flaws Let Remote Users Execute Arbitrary Code, Obtain Potentially Sensitive Information, Bypass Security Restrictions, and Conduct Cross-Site Scripting Attacks - SecurityTrack
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http://lists.opensuse.org/opensuse-security-announce/2015-11/msg00015.html
[security-announce] openSUSE-SU-2015:1942-1: important: Security update
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https://bugzilla.mozilla.org/show_bug.cgi?id=1182778
1182778 - (CVE-2015-4518) Passive script execution on about:reader via SVG animations (affects: Firefox, NoScript, CSP; impact: spoofing, phishing)
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https://bugzilla.mozilla.org/show_bug.cgi?id=1136692
1136692 - Reader Mode does not completely disable all active content (XSS)
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http://www.mozilla.org/security/announce/2015/mfsa2015-118.html
CSP bypass due to permissive Reader mode whitelist — MozillaVendor Advisory
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