Vulnerability Description
Schannel (aka Secure Channel) in Microsoft Windows Server 2003 SP2, Windows Vista SP2, Windows Server 2008 SP2 and R2 SP1, Windows 7 SP1, Windows 8, Windows 8.1, Windows Server 2012 Gold and R2, and Windows RT Gold and 8.1 does not properly restrict TLS state transitions, which makes it easier for remote attackers to conduct cipher-downgrade attacks to EXPORT_RSA ciphers via crafted TLS traffic, related to the "FREAK" issue, a different vulnerability than CVE-2015-0204 and CVE-2015-1067.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Microsoft | Windows 7 | - |
| Microsoft | Windows 8 | - |
| Microsoft | Windows 8.1 | - |
| Microsoft | Windows Rt | - |
| Microsoft | Windows Rt 8.1 | - |
| Microsoft | Windows Server 2003 | - |
| Microsoft | Windows Server 2008 | - |
| Microsoft | Windows Server 2012 | - |
| Microsoft | Windows Vista | - |
Related Weaknesses (CWE)
References
- http://web.archive.org/web/20150321220028/https://freakattack.com/
- http://www.securityfocus.com/bid/72965Third Party AdvisoryVDB Entry
- http://www.securitytracker.com/id/1031833Third Party AdvisoryVDB Entry
- https://docs.microsoft.com/en-us/security-updates/securitybulletins/2015/ms15-03PatchVendor Advisory
- https://freakattack.com/Vendor Advisory
- https://technet.microsoft.com/library/security/3046015PatchVendor Advisory
- http://web.archive.org/web/20150321220028/https://freakattack.com/
- http://www.securityfocus.com/bid/72965Third Party AdvisoryVDB Entry
- http://www.securitytracker.com/id/1031833Third Party AdvisoryVDB Entry
- https://docs.microsoft.com/en-us/security-updates/securitybulletins/2015/ms15-03PatchVendor Advisory
- https://freakattack.com/Vendor Advisory
- https://technet.microsoft.com/library/security/3046015PatchVendor Advisory
FAQ
What is CVE-2015-1637?
CVE-2015-1637 is a vulnerability with a CVSS score of 4.3 (MEDIUM). Schannel (aka Secure Channel) in Microsoft Windows Server 2003 SP2, Windows Vista SP2, Windows Server 2008 SP2 and R2 SP1, Windows 7 SP1, Windows 8, Windows 8.1, Windows Server 2012 Gold and R2, and W...
How severe is CVE-2015-1637?
CVE-2015-1637 has been rated MEDIUM with a CVSS base score of 4.3/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2015-1637?
Check the references section above for vendor advisories and patch information. Affected products include: Microsoft Windows 7, Microsoft Windows 8, Microsoft Windows 8.1, Microsoft Windows Rt, Microsoft Windows Rt 8.1.