CVE-2015-1637
What it is
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.
At a glance
- Exploitability
- Can be exploited over the network without logging in. Limited direct impact.
- Exploit odds
- 13.2% chance of exploitation in the next 30 days (EPSS). Higher than most.
- Fix
- A patch, advisory or fixed version is referenced. Upgrade or apply it.
Timeline
- PublishedDisclosed publicly on CVE.org and NVD
- Last updatedMost recent change to the record
Why it ranks here
- Exploited in the wild: no, CISA does not list it.
- Exploit odds: 13.2% in the next 30 days (EPSS).
- Severity: 4.3 MEDIUM (CVSS).
- Fix: a patch or advisory is linked.
Details
- Published
- Last modified
- Exploit probability
- 13.2% · EPSS, next 30 days
- Weakness
- CWE-310
- Record status
- Modified
Affected
- 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 2008 r2
Attack profile CVSS 2.0 · 4.3
- Attack vector
- Network
- Complexity
- Medium
- Authentication
- None
- Confidentiality
- None
- Integrity
- Partial
- Availability
- None
Raw vector
AV:N/AC:M/Au:N/C:N/I:P/A:N
Is it in your code?
Hand this to your coding agent. It searches your project for the affected products and checks versions. Nothing leaves your machine.
Read https://cve-list.com/agent/cve/CVE-2015-1637.md and follow it. Check whether this project is affected by CVE-2015-1637. Read only. Don't change anything and don't upload my code. Tell me yes, no or not sure, with the file as proof.
Fix and advisories
- https://docs.microsoft.com/en-us/security-updates/securitybulletins/2015/ms15-031
- https://freakattack.com/
- https://technet.microsoft.com/library/security/3046015
- https://docs.microsoft.com/en-us/security-updates/securitybulletins/2015/ms15-031
- https://freakattack.com/
- https://technet.microsoft.com/library/security/3046015
References
- http://web.archive.org/web/20150321220028/https://freakattack.com/
- http://www.securityfocus.com/bid/72965
- http://www.securitytracker.com/id/1031833
- https://docs.microsoft.com/en-us/security-updates/securitybulletins/2015/ms15-031
- https://freakattack.com/
- https://technet.microsoft.com/library/security/3046015
- http://web.archive.org/web/20150321220028/https://freakattack.com/
- http://www.securityfocus.com/bid/72965
- http://www.securitytracker.com/id/1031833
- https://docs.microsoft.com/en-us/security-updates/securitybulletins/2015/ms15-031
- https://freakattack.com/
- https://technet.microsoft.com/library/security/3046015