Vulnerability Description
Mozilla Firefox before 41.0 and Firefox ESR 38.x before 38.3 allow remote attackers to bypass CORS preflight protection mechanisms by leveraging (1) duplicate cache-key generation or (2) retrieval of a value from an incorrect HTTP Access-Control-* response header.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Mozilla | Firefox | 38.0 |
Related Weaknesses (CWE)
References
- http://lists.opensuse.org/opensuse-security-announce/2015-10/msg00000.html
- http://lists.opensuse.org/opensuse-security-announce/2015-10/msg00003.html
- http://lists.opensuse.org/opensuse-security-announce/2015-10/msg00004.html
- http://lists.opensuse.org/opensuse-security-announce/2015-10/msg00005.html
- http://lists.opensuse.org/opensuse-security-announce/2015-10/msg00007.html
- http://lists.opensuse.org/opensuse-security-announce/2015-11/msg00025.html
- http://rhn.redhat.com/errata/RHSA-2015-1834.html
- http://rhn.redhat.com/errata/RHSA-2015-1852.html
- http://www.debian.org/security/2015/dsa-3365
- http://www.mozilla.org/security/announce/2015/mfsa2015-111.htmlVendor Advisory
- http://www.oracle.com/technetwork/topics/security/bulletinapr2016-2952098.html
- http://www.oracle.com/technetwork/topics/security/linuxbulletinoct2015-2719645.h
- http://www.securityfocus.com/bid/76816
- http://www.securitytracker.com/id/1033640
- http://www.ubuntu.com/usn/USN-2743-1
FAQ
What is CVE-2015-4520?
CVE-2015-4520 is a vulnerability with a CVSS score of 6.4 (MEDIUM). Mozilla Firefox before 41.0 and Firefox ESR 38.x before 38.3 allow remote attackers to bypass CORS preflight protection mechanisms by leveraging (1) duplicate cache-key generation or (2) retrieval of ...
How severe is CVE-2015-4520?
CVE-2015-4520 has been rated MEDIUM with a CVSS base score of 6.4/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2015-4520?
Check the references section above for vendor advisories and patch information. Affected products include: Mozilla Firefox.