CVE-2015-1637

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.

• CWE-310

• http://web.archive.org/web/20150321220028/https://freakattack.com/
• http://www.securityfocus.com/bid/72965Third Party Advisory, VDB Entry
• http://www.securitytracker.com/id/1031833Third Party Advisory, VDB Entry
• https://docs.microsoft.com/en-us/security-updates/securitybulletins/2015/ms15-031Patch, Vendor Advisory
• https://freakattack.com/Vendor Advisory
• https://technet.microsoft.com/library/security/3046015Patch, Vendor Advisory
• http://web.archive.org/web/20150321220028/https://freakattack.com/
• http://www.securityfocus.com/bid/72965Third Party Advisory, VDB Entry
• http://www.securitytracker.com/id/1031833Third Party Advisory, VDB Entry
• https://docs.microsoft.com/en-us/security-updates/securitybulletins/2015/ms15-031Patch, Vendor Advisory
• https://freakattack.com/Vendor Advisory
• https://technet.microsoft.com/library/security/3046015Patch, Vendor Advisory

Published

Mar 6, 2015

Last Modified

Jun 17, 2026

Status

Modified

• How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
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