CVE-2009-0077
CVE-2009-0077 is a medium-severity vulnerability in Microsoft Forefront Threat Management Gateway with a CVSS 2.0 base score of 5.0. Its EPSS exploit-prediction score of 78% places it in the 100th percentile, indicating an elevated likelihood of exploitation.
Key facts
- Severity: Medium (CVSS 2.0 base score 5.0)
- EPSS exploit prediction: 78% (100th percentile)
- Actively exploited: Not listed in CISA KEV
- Affected product: Microsoft Forefront Threat Management Gateway
- Published:
- Last modified:
Description
The firewall engine in Microsoft Forefront Threat Management Gateway, Medium Business Edition (TMG MBE); and Internet Security and Acceleration (ISA) Server 2004 SP3, 2006, 2006 Supportability Update, and 2006 SP1; does not properly manage the session state of web listeners, which allows remote attackers to cause a denial of service (many stale sessions) via crafted packets, aka "Web Proxy TCP State Limited Denial of Service Vulnerability."
Frequently asked questions
- What is CVE-2009-0077?
- The firewall engine in Microsoft Forefront Threat Management Gateway, Medium Business Edition (TMG MBE); and Internet Security and Acceleration (ISA) Server 2004 SP3, 2006, 2006 Supportability Update, and 2006 SP1; does not properly manage the session state of web listeners, which allows remote attackers to cause a denial of service (many stale sessions) via crafted packets, aka "Web Proxy TCP State Limited Denial of Service Vulnerability."
- How severe is CVE-2009-0077?
- CVE-2009-0077 has a CVSS 2.0 base score of 5.0, rated medium severity.
- Is CVE-2009-0077 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 78% (100th percentile), an estimate of the probability of exploitation in the next 30 days.
- What products are affected by CVE-2009-0077?
- CVE-2009-0077 primarily affects Microsoft Forefront Threat Management Gateway. In total, 5 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
- How do I fix CVE-2009-0077?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
- When was CVE-2009-0077 published?
- CVE-2009-0077 was published on 2009-04-15 and last updated on 2026-06-16.
References
- http://osvdb.org/53636
- http://secunia.com/advisories/34687
- http://www.securitytracker.com/id?1022045
- http://www.us-cert.gov/cas/techalerts/TA09-104A.html
- http://www.vupen.com/english/advisories/2009/1030
- https://docs.microsoft.com/en-us/security-updates/securitybulletins/2009/ms09-016
- https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A6068
Affected products (5)
- cpe:2.3:a:microsoft:forefront_threat_management_gateway:-:-:medium_business:*:*:*:*:*
- cpe:2.3:a:microsoft:internet_security_and_acceleration_server:2004:sp3:enterprise:*:*:*:*:*
- cpe:2.3:a:microsoft:internet_security_and_acceleration_server:2004:sp3:standard:*:*:*:*:*
- cpe:2.3:a:microsoft:internet_security_and_acceleration_server:2006:sp1:*:*:*:*:*:*
- cpe:2.3:a:microsoft:internet_security_and_acceleration_server:2006:supportability:*:*:*:*:*:*
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