← Vulnerability feed

Vulnerability record · CVE-2006-0321 · published 24 January 2006

CVE-2006-0321: Fetchmail improper input validation vulnerability

Fetchmail · Fetchmail

fetchmail 6.3.0 and other versions before 6.3.2 allows remote attackers to cause a denial of service (crash) via crafted e-mail messages that cause a free of an invalid pointer when fetchmail bounces the message to the originator or local postmaster.

5.0 CVSS 2.0 Medium EPSS 3.5% · top 11.2% CWE-20 · Improper input validation
5.0CVSS 2.0 base score
3.5%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
34References
16 Jun 2026Last modified by NVD

Description

fetchmail 6.3.0 and other versions before 6.3.2 allows remote attackers to cause a denial of service (crash) via crafted e-mail messages that cause a free of an invalid pointer when fetchmail bounces the message to the originator or local postmaster.

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

Affected products

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

References

LinkTags
http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=348747
http://developer.berlios.de/project/shownotes.php?release_id=8784
http://fetchmail.berlios.de/fetchmail-SA-2006-01.txt PatchVendor Advisory
http://lists.apple.com/archives/security-announce/2006//Aug/msg00000.html
http://secunia.com/advisories/18571 Vendor Advisory
http://secunia.com/advisories/18895 Vendor Advisory
http://secunia.com/advisories/21253 Vendor Advisory
http://securitytracker.com/id?1015527
http://slackware.com/security/viewer.php?l=slackware-security&y=2006&m=slackware-security.443499
http://www.osvdb.org/22691
http://www.securityfocus.com/archive/1/422936/100/0/threaded
http://www.securityfocus.com/bid/16365
http://www.securityfocus.com/bid/19289
http://www.us-cert.gov/cas/techalerts/TA06-214A.html US Government Resource
http://www.vupen.com/english/advisories/2006/0300
http://www.vupen.com/english/advisories/2006/3101
https://exchange.xforce.ibmcloud.com/vulnerabilities/24265
http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=348747
http://developer.berlios.de/project/shownotes.php?release_id=8784
http://fetchmail.berlios.de/fetchmail-SA-2006-01.txt PatchVendor Advisory
http://lists.apple.com/archives/security-announce/2006//Aug/msg00000.html
http://secunia.com/advisories/18571 Vendor Advisory
http://secunia.com/advisories/18895 Vendor Advisory
http://secunia.com/advisories/21253 Vendor Advisory
http://securitytracker.com/id?1015527
http://slackware.com/security/viewer.php?l=slackware-security&y=2006&m=slackware-security.443499
http://www.osvdb.org/22691
http://www.securityfocus.com/archive/1/422936/100/0/threaded
http://www.securityfocus.com/bid/16365
http://www.securityfocus.com/bid/19289
http://www.us-cert.gov/cas/techalerts/TA06-214A.html US Government Resource
http://www.vupen.com/english/advisories/2006/0300
http://www.vupen.com/english/advisories/2006/3101
https://exchange.xforce.ibmcloud.com/vulnerabilities/24265

Track CVE-2006-0321 inside VULONE

Watch it alongside the ransomware crews, C2 infrastructure and forum chatter that reference it, query it through the API and pull it into your SIEM over TAXII.

Start free Open in platform

Related vulnerabilities

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

10.0CVE-2001-1009Fetchmail permissions and access controls vulnerabilityFetchmail (aka fetchmail-ssl) before 5.8.17 allows a remote malicious (1) IMAP server or (2) POP/POP3 server to overwrite arbitrary memory and possib…EPSS 6.5%10.0CVE-2001-0101Fetchmail vulnerabilityVulnerability in fetchmail 5.5.0-2 and earlier in the AUTHENTICATE GSSAPI command.EPSS 1.8%7.8CVE-2006-5867Fetchmail improper input validation vulnerabilityfetchmail before 6.3.6-rc4 does not properly enforce TLS and may transmit cleartext passwords over unsecured links if certain circumstances occur, wh…EPSS 4.4%7.8CVE-2006-5974Fetchmail improper input validation vulnerabilityfetchmail 6.3.5 and 6.3.6 before 6.3.6-rc4, when refusing a message delivered via the mda option, allows remote attackers to cause a denial of servic…EPSS 3.9%7.8CVE-2005-4348Fetchmail vulnerabilityfetchmail before 6.3.1 and before 6.2.5.5, when configured for multidrop mode, allows remote attackers to cause a denial of service (application cras…EPSS 3.6%7.5CVE-2021-36386Fetchmail vulnerabilityreport_vbuild in report.c in Fetchmail before 6.4.20 sometimes omits initialization of the vsnprintf va_list argument, which might allow mail servers…EPSS 2.6%7.5CVE-2002-1365Fetchmail memory buffer overflow vulnerabilityHeap-based buffer overflow in Fetchmail 6.1.3 and earlier does not account for the "@" character when determining buffer lengths for local addresses,…EPSS 5.0%7.5CVE-2002-1174Fetchmail memory buffer overflow vulnerabilityBuffer overflows in Fetchmail 6.0.0 and earlier allow remote attackers to cause a denial of service (crash) or execute arbitrary code via (1) long he…EPSS 4.7%

Source: NIST National Vulnerability Database (record CVE-2006-0321), CISA KEV, FIRST EPSS (scores of 2026-09-29). This page is refreshed as NVD updates the record.