Vulnerability in Microsoft Windows 7
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.
Vulnerability class: POODLE (CVE-2014-3566)
Published · last modified .
CVSS v2 metric
CVSS v2 base score 4.3 (Medium). Vector: AV:N/AC:M/Au:N/C:N/I:P/A:N. This CVE predates CVSS v3 and has no v3 score from NVD.
EPSS exploit prediction
EPSS: 0.132 (96.2th percentile), scored .
Moderate probability of exploitation in the next 30 days — watch for active exploitation reports. 96th percentile — 96.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.132 · newest: 0.132 · change: 0.000
Affected products
Weakness classification (CWE)
Public proof-of-concept exploits
References
- technet.microsoft.com/library/security/3046015 (Patch, Vendor Advisory)
- www.securitytracker.com/id/1031833 (VDB Entry, Third Party Advisory, vdb-entry)
- www.securityfocus.com/bid/72965 (VDB Entry, Third Party Advisory, vdb-entry)
- freakattack.com/ (Vendor Advisory)
- docs.microsoft.com/en-us/security-updates/securitybulletins/2015/ms15-031 (vendor-advisory, Patch, Vendor Advisory)
- web.archive.org/web/20150321220028/https://freakattack.com/
Frequently asked questions
- What is CVE-2015-1637?
- CVE-2015-1637 is a vulnerability in Microsoft Windows 7, classified under Cryptographic Issues. Published 2015-03-06.
- Is CVE-2015-1637 known to be exploited?
- 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.