CVE-2007-0039

Severity: high (CVSS 7.8 v2.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 44.6% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2007-05-08 · updated 2026-06-16
Weakness: CWE-476

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.

Affected products

Microsoft Exchange Server: 2000-sp3, 2003-sp1, 2003-sp2; 2007

References

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

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