CVE-2014-0253
Microsoft .NET Framework 1.1 SP1, 2.0 SP2, 3.5, 3.5.1, 4, 4.5, and 4.5.1 does not properly determine TCP connection states, which allows remote attackers to cause a denial of service (ASP.NET daemon hang) via crafted HTTP requests that trigger…
Does this matter?
EPSS puts the probability of exploitation in the next 30 days at 38.7%, higher than 99% of all known CVEs. Patch or mitigate before the next change window.
Description
Microsoft .NET Framework 1.1 SP1, 2.0 SP2, 3.5, 3.5.1, 4, 4.5, and 4.5.1 does not properly determine TCP connection states, which allows remote attackers to cause a denial of service (ASP.NET daemon hang) via crafted HTTP requests that trigger persistent resource consumption for a (1) stale or (2) closed connection, as exploited in the wild in February 2014, aka "POST Request DoS Vulnerability."
- CVSS 2.0
- 5.0 MEDIUMAV:N/AC:L/Au:N/C:N/I:N/A:P
- EPSS
- 38.70% probability · 99th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Not listed
- Weakness
- CWE-20
- Affected
- microsoft/.net framework
- Source
- secure@microsoft.com
EPSS 38.7% since 4 November 2026; no change recorded yet. The dashed line is the ten per cent mark our analysts treat as “patch before the next change window”. Points are recorded when the score first appears and whenever it moves by a percentage point or more.
References
- http://osvdb.org/103162
- http://secunia.com/advisories/56793
- http://www.securityfocus.com/bid/65415
- http://www.securitytracker.com/id/1029745
- https://docs.microsoft.com/en-us/security-updates/securitybulletins/2014/ms14-009
- http://osvdb.org/103162
- http://secunia.com/advisories/56793
- http://www.securityfocus.com/bid/65415
- http://www.securitytracker.com/id/1029745
- https://docs.microsoft.com/en-us/security-updates/securitybulletins/2014/ms14-009
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.