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Vulnerability record · CVE-2006-5974 · published 31 December 2006

CVE-2006-5974: Fetchmail improper input validation vulnerability

Fetchmail · Fetchmail

fetchmail 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 service (crash) via unknown vectors that trigger a NULL pointer dereference when calling the (1) ferror or (2) fflush functions.

7.8 CVSS 2.0 High EPSS 3.9% · top 10.1% CWE-20 · Improper input validation
7.8CVSS 2.0 base score
3.9%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
36References
16 Jun 2026Last modified by NVD

Description

fetchmail 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 service (crash) via unknown vectors that trigger a NULL pointer dereference when calling the (1) ferror or (2) fflush functions.

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

Affected products

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

References

LinkTags
http://fedoranews.org/cms/node/2429
http://fetchmail.berlios.de/fetchmail-SA-2006-03.txt
http://osvdb.org/31836
http://secunia.com/advisories/23631 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/24151 Vendor Advisory
http://security.gentoo.org/glsa/glsa-200701-13.xml
http://securitytracker.com/id?1017479
http://slackware.com/security/viewer.php?l=slackware-security&y=2007&m=slackware-security.517995
http://www.novell.com/linux/security/advisories/2007_4_sr.html
http://www.openpkg.com/security/advisories/OpenPKG-SA-2007.004.html
http://www.securityfocus.com/archive/1/456114/100/0/threaded
http://www.securityfocus.com/bid/21902 Patch
http://www.trustix.org/errata/2007/0007
http://www.vupen.com/english/advisories/2007/0087
http://www.vupen.com/english/advisories/2007/0088
http://fedoranews.org/cms/node/2429
http://fetchmail.berlios.de/fetchmail-SA-2006-03.txt
http://osvdb.org/31836
http://secunia.com/advisories/23631 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/24151 Vendor Advisory
http://security.gentoo.org/glsa/glsa-200701-13.xml
http://securitytracker.com/id?1017479
http://slackware.com/security/viewer.php?l=slackware-security&y=2007&m=slackware-security.517995
http://www.novell.com/linux/security/advisories/2007_4_sr.html
http://www.openpkg.com/security/advisories/OpenPKG-SA-2007.004.html
http://www.securityfocus.com/archive/1/456114/100/0/threaded
http://www.securityfocus.com/bid/21902 Patch
http://www.trustix.org/errata/2007/0007
http://www.vupen.com/english/advisories/2007/0087
http://www.vupen.com/english/advisories/2007/0088

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Related vulnerabilities

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

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Source: NIST National Vulnerability Database (record CVE-2006-5974), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.