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Vulnerability record · CVE-2003-0819 · published 17 February 2004

CVE-2003-0819: Microsoft proxy server memory buffer overflow vulnerability

Microsoft · Proxy Server

Buffer overflow in the H.323 filter of Microsoft Internet Security and Acceleration Server 2000 allows remote attackers to execute arbitrary code in the Microsoft Firewall Service via certain H.323 traffic, as demonstrated by the NISCC/OUSPG PROTOS test suite for the H.225 protocol.

10.0 CVSS 2.0 High EPSS 41% · top 1.4% CWE-119 · Memory buffer overflow
10.0CVSS 2.0 base score
41%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
18References
16 Jun 2026Last modified by NVD

Description

Buffer overflow in the H.323 filter of Microsoft Internet Security and Acceleration Server 2000 allows remote attackers to execute arbitrary code in the Microsoft Firewall Service via certain H.323 traffic, as demonstrated by the NISCC/OUSPG PROTOS test suite for the H.225 protocol.

AV:N/AC:L/Au:N/C:C/I:C/A:C

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
http://secunia.com/advisories/10611
http://www.cert.org/advisories/CA-2004-01.html PatchThird Party AdvisoryUS Government Resource
http://www.kb.cert.org/vuls/id/749342 PatchThird Party AdvisoryUS Government Resource
http://www.securityfocus.com/bid/9406
http://www.securityfocus.com/bid/9408 PatchVendor Advisory
http://www.securitytracker.com/id?1008698
http://www.uniras.gov.uk/vuls/2004/006489/h323.htm
https://docs.microsoft.com/en-us/security-updates/securitybulletins/2004/ms04-001
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A478
http://secunia.com/advisories/10611
http://www.cert.org/advisories/CA-2004-01.html PatchThird Party AdvisoryUS Government Resource
http://www.kb.cert.org/vuls/id/749342 PatchThird Party AdvisoryUS Government Resource
http://www.securityfocus.com/bid/9406
http://www.securityfocus.com/bid/9408 PatchVendor Advisory
http://www.securitytracker.com/id?1008698
http://www.uniras.gov.uk/vuls/2004/006489/h323.htm
https://docs.microsoft.com/en-us/security-updates/securitybulletins/2004/ms04-001
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A478

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2003-0819), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.