CVE-2011-1947
fetchmail 5.9.9 through 6.3.19 does not properly limit the wait time after issuing a (1) STARTTLS...
CVE-2011-1947 is a medium vulnerability (CVSS 5.0) in Fetchmail, published June 2, 2011. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 2.55%, the 85th percentile. Fixed in fetchmail 6.3.22-1.
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.
Exploit likelihood
What each source reports
NVD Score used
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.
- Record
CVE-2011-1947- CVSS 2.0
- 5.0 Medium
AV:N/AC:L/Au:N/C:N/I:N/A:P - Weakness
- CWE-399
- Updated
- 2026-11-02
CVE List No score
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.
- Record
CVE-2011-1947- Updated
- 2026-11-02
EUVDEUVD-2011-1944 No score
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.
- Record
EUVD-2011-1944- Updated
- 2026-11-03
GitHub AdvisoriesGHSA-xrcr-j9jp-xv96 No score
fetchmail 5.9.9 through 6.3.19 does not properly limit the wait time after issuing a (1) STARTTLS...
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.
- Record
GHSA-xrcr-j9jp-xv96- Updated
- 2026-11-02
OSV No score
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.
- Record
CVE-2011-1947- Updated
- 2026-11-02
OSVDEBIAN-CVE-2011-1947 No score
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.
- Record
DEBIAN-CVE-2011-1947- Updated
- 2026-11-02
OSVopenSUSE-SU-2024:10194-1 No score
fetchmail-6.3.26-13.4 on GA media
These are all security issues fixed in the fetchmail-6.3.26-13.4 package on the GA media of openSUSE Tumbleweed.
- Record
openSUSE-SU-2024:10194-1- Updated
- 2026-11-02
OSVUBUNTU-CVE-2011-1947 No score
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.
- Record
UBUNTU-CVE-2011-1947- Updated
- 2026-11-02
Affected products
Affected packages
History
| When | Changed | Sources |
|---|---|---|
| 2026-11-03 | affected | |
| 2026-11-03 | aliases | EUVD |
| 2026-11-02 | created | CVE List, GitHub Advisories, NVD, OSV |
References
openwall.com/lists/oss-security/2011/05/31/17
securityfocus.com/bid/48043
lists.fedoraproject.org/pipermail/package-announce/2011-June/061672.html
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gitorious.org/fetchmail/fetchmail/blobs/legacy_63/fetchmail-SA-2011-01.txt
securitytracker.com/id?1025605
mandriva.com/security/advisories?name=MDVSA-2011:107
fetchmail.info/fetchmail-SA-2011-01.txt
exchange.xforce.ibmcloud.com/vulnerabilities/67700
nvd.nist.gov/vuln/detail/CVE-2011-1947
github.com/advisories/GHSA-xrcr-j9jp-xv96
security-tracker.debian.org/tracker/CVE-2011-1947
ubuntu.com/security/CVE-2011-1947
cve.org/CVERecord?id=CVE-2011-1947
suse.com/security/cve/CVE-2009-2666