CVE-2009-4479: LDAP3A.exe in MailSite 8.0.4 allows remote attackers to cause a denial of service (heap memory corruption and

This month

HIGH 7.8DOWNGRADE

CVE-2009-4479 is a high-severity flaw (CVSS 7.8) affecting mailsite. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

LDAP3A.exe in MailSite 8.0.4 allows remote attackers to cause a denial of service (heap memory corruption and daemon crash) via unspecified vectors, as demonstrated by a certain module in VulnDisco Pack Professional 7.13 through 8.11. NOTE: as of 20091229, this disclosure has no actionable information. However, because the VulnDisco Pack author is a reliable researcher, the issue is being assigned a CVE identifier for tracking purposes.

Why this priority

High severity

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	7.8 (High)
EPSS exploit chance	1.6% (top 24%)
CISA exploited list	No
Weakness	CWE-399
Published	2009-12-30
Last modified	2026-06-16

Publisher (CNA): MITRE · Vendor: mailsite

Last updated 2026-06-16 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2009-12-30 21:30 UTCPublished CVE record published
2026-06-16 23:13 UTCUpdated Record last modified

mailsite mailsite DOWNGRADE

Affected: 8.0.4

Fixed in: no fixed release known

Safe to downgrade to: a release before 8.0.4

1. Check installed version

apt-cache policy mailsite || rpm -q mailsite || mailsite --version

2. No fixed release: DOWNGRADE to a release before 8.0.4 (Debian / Ubuntu)

apt-cache madison mailsite sudo apt install mailsite=<VERSION_BEFORE_8.0.4> sudo apt-mark hold mailsite

2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list mailsite sudo dnf downgrade mailsite-<VERSION_BEFORE_8.0.4> sudo dnf versionlock add mailsite

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2009-4479?

mailsite: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2009-4479 being exploited?

CVE-2009-4479 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2009-4479 affect?

CVE-2009-4479 affects mailsite. Severity is high (CVSS 7.8). LDAP3A.exe in MailSite 8.0.4 allows remote attackers to cause a denial of service (heap memory corruption and daemon crash) via unspecified vectors, as demonstrated by a certain module in VulnDisco Pack Professional 7.13 through 8.11. NOTE

How urgent is CVE-2009-4479?

Priority 46/100. High severity

Related CVEs

CVE-2009-4483 MEDIUM 5.0 DOWNGRADE Unspecified vulnerability in LDAP3A.exe in MailSite 8.0.4 allows remote attackers to cause a denial of service
CVE-2006-0790 MEDIUM 5.0 DOWNGRADE Rockliffe MailSite 7.0 and earlier allows remote attackers to cause a denial of service by sending crafted LDA
CVE-2006-0342 HIGH 7.8 DOWNGRADE RockLiffe MailSite HTTP Mail management agent (httpma) 7.0.3.1 allows remote attackers to cause a denial of se
CVE-2006-0341 MEDIUM 4.3 UPGRADE Cross-site scripting (XSS) vulnerability in WCONSOLE.DLL in Rockliffe MailSite 5.x and 6.1.22 and earlier allo
CVE-2006-0130 HIGH 7.5 UPGRADE Mail Management Agent (MAILMA) (aka Mail Management Server) in Rockliffe MailSite 7.0.3.1 and earlier allows r

References

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