CVE-2015-4520
The MITRE CVE dictionary describes this issue as:
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.
Find out more about CVE-2015-4520 from the MITRE CVE dictionary dictionary and NIST NVD.
CVSS v2 metrics
| Base Score | 6.8 |
|---|---|
| Base Metrics | AV:N/AC:M/Au:N/C:P/I:P/A:P |
| Access Vector | Network |
| Access Complexity | Medium |
| Authentication | None |
| Confidentiality Impact | Partial |
| Integrity Impact | Partial |
| Availability Impact | Partial |
Find out more about Red Hat support for the Common Vulnerability Scoring System (CVSS).
Red Hat Security Errata
| Platform | Errata | Release Date |
|---|---|---|
| Red Hat Enterprise Linux Optional Productivity Applications (v. 5 server) (thunderbird) | RHSA-2015:1852 | 2015-10-01 |
| Red Hat Enterprise Linux 7 (thunderbird) | RHSA-2015:1852 | 2015-10-01 |
| Red Hat Enterprise Linux 5 (thunderbird) | RHSA-2015:1852 | 2015-10-01 |
| Red Hat Enterprise Linux 6 (thunderbird) | RHSA-2015:1852 | 2015-10-01 |
| Red Hat Enterprise Linux 6 (firefox) | RHSA-2015:1834 | 2015-09-22 |
| Red Hat Enterprise Linux 7 (firefox) | RHSA-2015:1834 | 2015-09-22 |
| Red Hat Enterprise Linux 5 (firefox) | RHSA-2015:1834 | 2015-09-22 |
Acknowledgements
Red Hat would like to thank the Mozilla project for reporting this issue. Upstream acknowledges Ehsan Akhgari as the original reporter.External References
CVE description copyright © 2017, The MITRE Corporation