Vulnerability record · CVE-2011-1947 · published 2 June 2011

CVE-2011-1947: Fetchmail vulnerability

Fetchmail · Fetchmail

fetchmail 5.9.9 through 6.3.19 does not properly limit the wait time after issuing a (1) STARTTLS or (2) STLS request, which allows remote servers to cause a denial of service (application hang) by acknowledging the request but not sending additional packets.

5.0 CVSS 2.0 Medium EPSS 2.6% · top 15.6% CWE-399 · CWE-399

5.0CVSS 2.0 base score

2.6%EPSS exploitation probability, 30 days

NoNot in CISA KEV

1Affected product versions listed by NVD

28References

16 Jun 2026Last modified by NVD

Description

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.

Fetchmail Fetchmail

References

Link	Tags
http://gitorious.org/fetchmail/fetchmail/blobs/legacy_63/fetchmail-SA-2011-01.txt
http://lists.fedoraproject.org/pipermail/package-announce/2011-June/061634.html
http://lists.fedoraproject.org/pipermail/package-announce/2011-June/061672.html
http://lists.fedoraproject.org/pipermail/package-announce/2011-June/061735.html
http://openwall.com/lists/oss-security/2011/05/30/1
http://openwall.com/lists/oss-security/2011/05/31/12
http://openwall.com/lists/oss-security/2011/05/31/17
http://openwall.com/lists/oss-security/2011/06/01/2
http://www.fetchmail.info/fetchmail-SA-2011-01.txt
http://www.mandriva.com/security/advisories?name=MDVSA-2011:107
http://www.securityfocus.com/archive/1/518251/100/0/threaded
http://www.securityfocus.com/bid/48043
http://www.securitytracker.com/id?1025605
https://exchange.xforce.ibmcloud.com/vulnerabilities/67700
http://gitorious.org/fetchmail/fetchmail/blobs/legacy_63/fetchmail-SA-2011-01.txt
http://lists.fedoraproject.org/pipermail/package-announce/2011-June/061634.html
http://lists.fedoraproject.org/pipermail/package-announce/2011-June/061672.html
http://lists.fedoraproject.org/pipermail/package-announce/2011-June/061735.html
http://openwall.com/lists/oss-security/2011/05/30/1
http://openwall.com/lists/oss-security/2011/05/31/12
http://openwall.com/lists/oss-security/2011/05/31/17
http://openwall.com/lists/oss-security/2011/06/01/2
http://www.fetchmail.info/fetchmail-SA-2011-01.txt
http://www.mandriva.com/security/advisories?name=MDVSA-2011:107
http://www.securityfocus.com/archive/1/518251/100/0/threaded
http://www.securityfocus.com/bid/48043
http://www.securitytracker.com/id?1025605
https://exchange.xforce.ibmcloud.com/vulnerabilities/67700

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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%31 Aug 2001 10.0CVE-2001-0101Fetchmail vulnerabilityVulnerability in fetchmail 5.5.0-2 and earlier in the AUTHENTICATE GSSAPI command.EPSS 1.8%12 Feb 2001 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%31 Dec 2006 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%31 Dec 2006 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%21 Dec 2005 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%30 Jul 2021 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%23 Dec 2002 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%11 Oct 2002

Source: NIST National Vulnerability Database (record CVE-2011-1947), CISA KEV, FIRST EPSS (scores of 2026-09-29). This page is refreshed as NVD updates the record.