Unscored severity · published Mar 6, 2015
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…
–
CVSS
13.2%
EPSS
No
On KEV
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.
Exploitation
Is it being used?
Exploit prediction (EPSS)13.2% · higher than 96% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
W7
Windows 7 · Microsoft
All versions, or not specified · source: NVD
W8
Windows 8 · Microsoft
All versions, or not specified · source: NVD
W8
Windows 8.1 · Microsoft
All versions, or not specified · source: NVD
WR
Windows RT · Microsoft
All versions, or not specified · source: NVD
WR
Windows RT 8.1 · Microsoft
All versions, or not specified · source: NVD
WS
Windows Server 2003 · Microsoft
All versions, or not specified · source: NVD
WS
Windows Server 2008 · Microsoft
r2; r2 · source: NVD
WS
Windows Server 2012 · Microsoft
r2 · source: NVD
WV
Windows Vista · Microsoft
All versions, or not specified · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2015-1637
CVE.org
https://www.cve.org/CVERecord?id=CVE-2015-1637
web.archive.org
http://web.archive.org/web/20150321220028/https://freakattack.com/
Third Party Advisory
http://www.securityfocus.com/bid/72965
Third Party Advisory
http://www.securitytracker.com/id/1031833
Patch
https://docs.microsoft.com/en-us/security-updates/securitybulletins/2015/ms15-031
Vendor Advisory
https://freakattack.com/
Patch
https://technet.microsoft.com/library/security/3046015
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