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Vulnerability record · CVE-2003-0487 · published 7 August 2003

CVE-2003-0487: Kerio mailserver vulnerability

Kerio · Kerio Mailserver

Multiple buffer overflows in Kerio MailServer 5.6.3 allow remote authenticated users to cause a denial of service and possibly execute arbitrary code via (1) a long showuser parameter in the do_subscribe module, (2) a long folder parameter in the add_acl module, (3) a long folder parameter in the list module, and (4) a long user parameter in the do_map module.

7.5 CVSS 2.0 High EPSS 11% · top 4.1%
7.5CVSS 2.0 base score
11%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
8References, 4 tagged exploit
16 Jun 2026Last modified by NVD

Description

Multiple buffer overflows in Kerio MailServer 5.6.3 allow remote authenticated users to cause a denial of service and possibly execute arbitrary code via (1) a long showuser parameter in the do_subscribe module, (2) a long folder parameter in the add_acl module, (3) a long folder parameter in the list module, and (4) a long user parameter in the do_map module.

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

Affected products

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

References

LinkTags
http://marc.info/?l=bugtraq&m=105596982503760&w=2
http://nautopia.org/vulnerabilidades/kerio_mailserver.htm ExploitVendor Advisory
http://www.securityfocus.com/bid/7967 ExploitPatchVendor Advisory
https://exchange.xforce.ibmcloud.com/vulnerabilities/12368
http://marc.info/?l=bugtraq&m=105596982503760&w=2
http://nautopia.org/vulnerabilidades/kerio_mailserver.htm ExploitVendor Advisory
http://www.securityfocus.com/bid/7967 ExploitPatchVendor Advisory
https://exchange.xforce.ibmcloud.com/vulnerabilities/12368

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Related vulnerabilities

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

10.0CVE-2008-0860Kerio avg plugin vulnerabilityUnspecified vulnerability in the AVG plugin in Kerio MailServer before 6.5.0 has unspecified impact via unknown remote attack vectors related to null…EPSS 1.5%10.0CVE-2007-3993Kerio mailserver vulnerabilityUnspecified vulnerability in the attachment filter in Kerio MailServer before 6.4.1 has unknown impact and remote attack vectors.EPSS 1.8%10.0CVE-2004-2441Kerio mailserver vulnerabilityUnspecified vulnerability in Kerio MailServer before 6.0.3 has unknown impact and unknown remote attack vectors, related to a "potential security iss…EPSS 1.7%7.8CVE-2006-1158Kerio mailserver vulnerabilityKerio MailServer before 6.1.3 Patch 1 allows remote attackers to cause a denial of service (application crash) via a crafted IMAP LOGIN command.EPSS 2.1%7.5CVE-2008-0858Kerio mailserver code injection vulnerabilityBuffer overflow in the Visnetic anti-virus plugin in Kerio MailServer before 6.5.0 might allow remote attackers to execute arbitrary code via unspeci…EPSS 4.0%7.5CVE-2005-1062Kerio mailserver vulnerabilityThe administration protocol for Kerio WinRoute Firewall 6.x up to 6.0.10, Personal Firewall 4.x up to 4.1.2, and MailServer up to 6.0.8 allows remote…EPSS 2.6%6.8CVE-2011-1506Kerio connect improper input validation vulnerabilityThe STARTTLS implementation in Kerio Connect 7.1.4 build 2985 and MailServer 6.x does not properly restrict I/O buffering, which allows man-in-the-mi…EPSS 2.5%6.8CVE-2002-1434Kerio mailserver vulnerabilityMultiple cross-site scripting (XSS) vulnerabilities in the Web mail module of Kerio MailServer 5.0 allow remote attackers to execute HTML script as o…EPSS 4.3%

Source: NIST National Vulnerability Database (record CVE-2003-0487), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.