CVE-2015-1637 Security feature bypass in n/a
Remote attackers can downgrade TLS connections to weak EXPORT_RSA ciphers via crafted traffic, bypassing security features in Windows Schannel.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2015-1637?
CVE-2015-1637 is a medium-severity vulnerability in Microsoft Windows 7, published on 6 Mar 2015. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official 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.
Weakness: CWE-310
Which versions are affected by CVE-2015-1637?
It affects 9 products.
Products include Microsoft Windows 7, Microsoft Windows 8, Microsoft Windows 8.1, Microsoft Windows Rt, Microsoft Windows Rt 8.1, Microsoft Windows Server 2003 and 3 more.
How do I fix CVE-2015-1637?
No fix has been published for CVE-2015-1637 yet. Limit exposure of the affected software until one is available.
Is CVE-2015-1637 being exploited?
There is no known exploitation of CVE-2015-1637 in the wild and no public exploit code.
Other vulnerabilities in Microsoft Windows 7
- CVE-2015-1635 Microsoft HTTP.sys Remote Code Execution
- CVE-2015-2360 Microsoft Win32k Privilege Escalation
- CVE-2014-6324 Microsoft Kerberos Key Distribution Center (KDC) Privilege Escalation
- CVE-2014-6332 Microsoft Windows Object Linking & Embedding (OLE) Automation Array Remote Code Execution
- CVE-2014-4148 Microsoft Windows Remote Code Execution
Sources
Also known as GHSA-h5m2-xvgx-vpw7.