CVE-2011-1947 json
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…
published 2011-06-02 15 y ago modified 2026-06-16 4 mo ago also EUVD-2011-1944
- cvss
- 5.0
- version 2.0, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 2.6%
- EPSS 2.6% chance of exploitation in 30 days, percentile 85%
- public exploits
- 0
- none known
Summary
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.
Patch / fix
- fetchmail Debian 14, Debian 13, Debian 12 6.3.22-1
debian advisories DEBIAN-CVE-2011-1947
- fetchmail openSUSE Tumbleweed 6.3.26-13.4
opensuse advisories openSUSE-SU-2024:10194-1
Vendor advisories
What the vendors themselves say about their products: affected, fixed or not affected, and what to do.
red hat product security vex CVE-2011-1947 updated cvss 2.6
fetchmail: Application hang due unguarded blocking I/O in IMAP/POP3 STARTTLS initialization (fetchmail-SA-2011-01)
-
Red Hat Enterprise Linux 4 fetchmail Red Hat Enterprise Linux 5 fetchmail Red Hat Enterprise Linux 6 fetchmailaffected: no fix planned “Will not fix”
Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf
Exploit prediction
2.55% chance of exploitation in the next 30 days, higher than 85% of all scored CVEs (FIRST EPSS, 2026-11-09).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| NVD | 2.0 | 5.0 | AV:N/AC:L/Au:N/C:N/I:N/A:P |
Classification
- Weakness
-
- CWE-399 Resource Management Errors
References
-
lists.fedoraproject.org
/pipermail/package-announce/2011-June/061672.html
vendor-advisory
-
lists.fedoraproject.org
/pipermail/package-announce/2011-June/061634.html
vendor-advisory
-
mandriva.com
/security/advisories?name=MDVSA-2011:107
vendor-advisory
-
lists.fedoraproject.org
/pipermail/package-announce/2011-June/061735.html
vendor-advisory
-
openwall.com
/lists/oss-security/2011/05/31/17
mailing-list
-
securityfocus.com
/bid/48043
vdb-entry
-
openwall.com
/lists/oss-security/2011/05/31/12
mailing-list
-
openwall.com
/lists/oss-security/2011/05/30/1
mailing-list
-
securityfocus.com
/archive/1/518251/100/0/threaded
mailing-list
- gitorious.org /fetchmail/fetchmail/blobs/legacy_63/fetchmail-SA-2011-01.txt
-
securitytracker.com
/id?1025605
vdb-entry
- fetchmail.info /fetchmail-SA-2011-01.txt
-
openwall.com
/lists/oss-security/2011/06/01/2
mailing-list
-
exchange.xforce.ibmcloud.com
/vulnerabilities/67700
vdb-entry
Sources
- CVE List CVE-2011-1947
- NVD CVE-2011-1947
Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.