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    CVE-2004-0840

    The SMTP (Simple Mail Transfer Protocol) component of Microsoft Windows XP 64-bit Edition, Windows Server 2003, Windows Server 2003 64-bit Edition, and the Exchange Routing Engine component of Exchange Server 2003, allows remote attackers to execute arbitrary code via a malicious DNS response message containing length values that are not properly validated.

    Published:Oct 16, 2004
    Last Modified:Apr 16, 2026
    EPS:Oct 16, 2004
    EPSS Score:0.3674
    CVSS Score:10

    Affected Products

    Vendor
    Microsoft
    Product
    Exchange Server
    Vendor
    Microsoft
    Product
    Windows Server 2003
    Vendor
    Microsoft
    Product
    Windows Xp

    Exploits

    No exploit reference

    Common Weakness Enumeration

    CWE-20 Improper Input Validation

    Common Attack Pattern Enumeration and Classification (CAPEC)

    CAPEC-10 Buffer Overflow via Environment Variables
    CAPEC-101 Server Side Include (SSI) Injection
    CAPEC-104 Cross Zone Scripting
    CAPEC-108 Command Line Execution through SQL Injection
    CAPEC-109 Object Relational Mapping Injection
    CAPEC-110 SQL Injection through SOAP Parameter Tampering
    CAPEC-120 Double Encoding
    CAPEC-13 Subverting Environment Variable Values
    CAPEC-135 Format String Injection
    CAPEC-136 LDAP Injection
    CAPEC-14 Client-side Injection-induced Buffer Overflow
    CAPEC-153 Input Data Manipulation
    CAPEC-182 Flash Injection
    CAPEC-209 XSS Using MIME Type Mismatch
    CAPEC-22 Exploiting Trust in Client
    CAPEC-23 File Content Injection
    CAPEC-230 Serialized Data with Nested Payloads
    CAPEC-231 Oversized Serialized Data Payloads
    CAPEC-24 Filter Failure through Buffer Overflow
    CAPEC-250 XML Injection
    CAPEC-261 Fuzzing for garnering other adjacent user/sensitive data
    CAPEC-267 Leverage Alternate Encoding
    CAPEC-28 Fuzzing
    CAPEC-3 Using Leading 'Ghost' Character Sequences to Bypass Input Filters
    CAPEC-31 Accessing/Intercepting/Modifying HTTP Cookies
    CAPEC-42 MIME Conversion
    CAPEC-43 Exploiting Multiple Input Interpretation Layers
    CAPEC-45 Buffer Overflow via Symbolic Links
    CAPEC-46 Overflow Variables and Tags
    CAPEC-47 Buffer Overflow via Parameter Expansion
    CAPEC-473 Signature Spoof
    CAPEC-52 Embedding NULL Bytes
    CAPEC-53 Postfix, Null Terminate, and Backslash
    CAPEC-588 DOM-Based XSS
    CAPEC-63 Cross-Site Scripting (XSS)
    CAPEC-64 Using Slashes and URL Encoding Combined to Bypass Validation Logic
    CAPEC-664 Server Side Request Forgery
    CAPEC-67 String Format Overflow in syslog()
    CAPEC-7 Blind SQL Injection
    CAPEC-71 Using Unicode Encoding to Bypass Validation Logic
    CAPEC-72 URL Encoding
    CAPEC-73 User-Controlled Filename
    CAPEC-78 Using Escaped Slashes in Alternate Encoding
    CAPEC-79 Using Slashes in Alternate Encoding
    CAPEC-8 Buffer Overflow in an API Call
    CAPEC-80 Using UTF-8 Encoding to Bypass Validation Logic
    CAPEC-81 Web Server Logs Tampering
    CAPEC-83 XPath Injection
    CAPEC-85 AJAX Footprinting
    CAPEC-88 OS Command Injection
    CAPEC-9 Buffer Overflow in Local Command-Line Utilities

    Related CVEs

    CVE-2026-62911 (CVSS 8) — Authentication bypass by capture-replay in Microsoft Exchange Server allows an authorized attacker to elevate …
    CVE-2026-65813 (CVSS 6.5) — Server-side request forgery (ssrf) in Microsoft Exchange Server allows an authorized attacker to elevate privi…
    CVE-2026-62915 (CVSS 6.5) — Missing authorization in Microsoft Exchange Server allows an authorized attacker to bypass a security feature …
    CVE-2026-62914 (CVSS 7.3) — Improper neutralization of input during web page generation ('cross-site scripting') in Microsoft Exchange Ser…
    CVE-2026-62913 (CVSS 8.8) — Heap-based buffer overflow in Microsoft Exchange Server allows an authorized attacker to execute code over a n…
    CVE-2026-62912 (CVSS 6.5) — Deserialization of untrusted data in Microsoft Exchange Server allows an authorized attacker to deny service o…
    CVE-2026-62910 (CVSS 7.2) — Improper control of resource identifiers ('resource injection') in Microsoft Exchange Server allows an authori…
    CVE-2026-47631 (CVSS 8.1) — Improper neutralization of input during web page generation ('cross-site scripting') in Microsoft Exchange Ser…
    CVE-2026-45504 (CVSS 8.8) — Server-side request forgery (ssrf) in Microsoft Exchange Server allows an authorized attacker to elevate privi…
    CVE-2026-45503 (CVSS 8.1) — Improper authorization in Microsoft Exchange Server allows an authorized attacker to disclose information over…

    References

    http://www.kb.cert.org/vuls/id/394792
    http://www.securityfocus.com/bid/11374
    https://docs.microsoft.com/en-us/security-updates/securitybulletins/2004/ms04-035
    https://exchange.xforce.ibmcloud.com/vulnerabilities/17621
    https://exchange.xforce.ibmcloud.com/vulnerabilities/17660
    https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A2300
    https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A3460
    https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A5509
    http://www.kb.cert.org/vuls/id/394792
    http://www.securityfocus.com/bid/11374
    https://docs.microsoft.com/en-us/security-updates/securitybulletins/2004/ms04-035
    https://exchange.xforce.ibmcloud.com/vulnerabilities/17621
    https://exchange.xforce.ibmcloud.com/vulnerabilities/17660
    https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A2300
    https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A3460
    https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A5509

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High