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Vulnerability record · CVE-2007-5256 · published 6 October 2007

CVE-2007-5256: Mcdu fsd memory buffer overflow vulnerability

MMcdu · Fsd

Multiple stack-based buffer overflows in FSD 2.052 d9 and earlier, and FSFDT FSD 3.000 d9 and earlier, allow (1) remote attackers to execute arbitrary code via a long HELP command on TCP port 3010 to the sysuser::exechelp function in sysuser.cc and (2) remote authenticated users to execute arbitrary code via long commands on TCP port 6809 to the servinterface::sendmulticast function in servinterface.cc, as demonstrated by a PIcallsign command.

7.5 CVSS 2.0 High EPSS 7.1% · top 6.0% CWE-119 · Memory buffer overflow
7.5CVSS 2.0 base score
7.1%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
18References, 2 tagged exploit
16 Jun 2026Last modified by NVD

Description

Multiple stack-based buffer overflows in FSD 2.052 d9 and earlier, and FSFDT FSD 3.000 d9 and earlier, allow (1) remote attackers to execute arbitrary code via a long HELP command on TCP port 3010 to the sysuser::exechelp function in sysuser.cc and (2) remote authenticated users to execute arbitrary code via long commands on TCP port 6809 to the servinterface::sendmulticast function in servinterface.cc, as demonstrated by a PIcallsign command.

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://aluigi.altervista.org/adv/fsdbof-adv.txt Exploit
http://secunia.com/advisories/27008 Vendor Advisory
http://secunia.com/advisories/27045 Vendor Advisory
http://securityreason.com/securityalert/3195
http://www.securityfocus.com/archive/1/481221/100/0/threaded
http://www.securityfocus.com/archive/1/481495/100/0/threaded
http://www.securityfocus.com/bid/25883
http://www.vupen.com/english/advisories/2007/3334
https://www.exploit-db.com/exploits/4484
http://aluigi.altervista.org/adv/fsdbof-adv.txt Exploit
http://secunia.com/advisories/27008 Vendor Advisory
http://secunia.com/advisories/27045 Vendor Advisory
http://securityreason.com/securityalert/3195
http://www.securityfocus.com/archive/1/481221/100/0/threaded
http://www.securityfocus.com/archive/1/481495/100/0/threaded
http://www.securityfocus.com/bid/25883
http://www.vupen.com/english/advisories/2007/3334
https://www.exploit-db.com/exploits/4484

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

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Source: NIST National Vulnerability Database (record CVE-2007-5256), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.