← Vulnerability feed

Vulnerability record · CVE-2006-5867 · published 31 December 2006

CVE-2006-5867: Fetchmail improper input validation vulnerability

Fetchmail · Fetchmail

fetchmail before 6.3.6-rc4 does not properly enforce TLS and may transmit cleartext passwords over unsecured links if certain circumstances occur, which allows remote attackers to obtain sensitive information via man-in-the-middle (MITM) attacks.

7.8 CVSS 2.0 High EPSS 4.4% · top 9.0% CWE-20 · Improper input validation
7.8CVSS 2.0 base score
4.4%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
74References
16 Jun 2026Last modified by NVD

Description

fetchmail before 6.3.6-rc4 does not properly enforce TLS and may transmit cleartext passwords over unsecured links if certain circumstances occur, which allows remote attackers to obtain sensitive information via man-in-the-middle (MITM) attacks.

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

Affected products

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

References

LinkTags
ftp://patches.sgi.com/support/free/security/advisories/20070201-01-P.asc
http://docs.info.apple.com/article.html?artnum=305391
http://fedoranews.org/cms/node/2429
http://fetchmail.berlios.de/fetchmail-SA-2006-02.txt
http://lists.apple.com/archives/Security-announce/2007/Apr/msg00001.html
http://osvdb.org/31580
http://secunia.com/advisories/23631 Vendor Advisory
http://secunia.com/advisories/23695 Vendor Advisory
http://secunia.com/advisories/23714 Vendor Advisory
http://secunia.com/advisories/23781 Vendor Advisory
http://secunia.com/advisories/23804 Vendor Advisory
http://secunia.com/advisories/23838 Vendor Advisory
http://secunia.com/advisories/23923 Vendor Advisory
http://secunia.com/advisories/24007 Vendor Advisory
http://secunia.com/advisories/24151 Vendor Advisory
http://secunia.com/advisories/24174 Vendor Advisory
http://secunia.com/advisories/24284 Vendor Advisory
http://secunia.com/advisories/24966 Vendor Advisory
http://security.gentoo.org/glsa/glsa-200701-13.xml
http://securitytracker.com/id?1017478
http://slackware.com/security/viewer.php?l=slackware-security&y=2007&m=slackware-security.517995
http://www.debian.org/security/2007/dsa-1259
http://www.mandriva.com/security/advisories?name=MDKSA-2007:016
http://www.novell.com/linux/security/advisories/2007_4_sr.html
http://www.openpkg.com/security/advisories/OpenPKG-SA-2007.004.html
http://www.redhat.com/support/errata/RHSA-2007-0018.html
http://www.securityfocus.com/archive/1/456115/100/0/threaded
http://www.securityfocus.com/archive/1/460528/100/0/threaded
http://www.securityfocus.com/bid/21903 Patch
http://www.trustix.org/errata/2007/0007
http://www.ubuntu.com/usn/usn-405-1
http://www.us-cert.gov/cas/techalerts/TA07-109A.html US Government Resource
http://www.vupen.com/english/advisories/2007/0087
http://www.vupen.com/english/advisories/2007/0088
http://www.vupen.com/english/advisories/2007/1470
https://issues.rpath.com/browse/RPL-919
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A10566
ftp://patches.sgi.com/support/free/security/advisories/20070201-01-P.asc
http://docs.info.apple.com/article.html?artnum=305391
http://fedoranews.org/cms/node/2429

Track CVE-2006-5867 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-2006-5974Fetchmail 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%7.5CVE-2001-0819Fetchmail memory buffer overflow vulnerabilityA buffer overflow in Linux fetchmail before 5.8.6 allows remote attackers to execute arbitrary code via a large 'To:' field in an email header.EPSS 6.4%

Source: NIST National Vulnerability Database (record CVE-2006-5867), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.