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TI-2011-01718 Aliases CVE-2011-1947GHSA-xrcr-j9jp-xv96

fetchmail 5.9.9 through 6.3.19 does not properly limit the wait time after issuing a (1)…

Priority LOW 28CWE-399Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
— Not recorded in CVSS 2.0
Attack complexity
Low
Impact type
Denial of service
Confidentiality · integrity · availability
None · None · Partial
Fix status
Will not fix Red Hat: no fix planned

Attack profile from CVSS 2.0 · NVD. Fix status from CNA and Red Hat. Impact type from CWE-399 and the CVSS impact.

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.

Why it matters now

EPSS 0.02551 85th percentileScored 2026-11-07
Fix Will not fix Red Hat: no fix planned

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

VendorProductAffected versionsFixed inStatusSource
——all versions—No fix listedCNA
  • — Vendor— Affected all versions Fixed in — No fix listed CNA

CPE configurations NVD · 52

CPEVersionsRoleVendor
cpe:2.3:a:fetchmail:fetchmail:5.9.9:*:*:*:*:*:*:*5.9.9Vulnerablefetchmail
cpe:2.3:a:fetchmail:fetchmail:5.9.10:*:*:*:*:*:*:*5.9.10Vulnerablefetchmail
cpe:2.3:a:fetchmail:fetchmail:5.9.11:*:*:*:*:*:*:*5.9.11Vulnerablefetchmail
cpe:2.3:a:fetchmail:fetchmail:5.9.13:*:*:*:*:*:*:*5.9.13Vulnerablefetchmail
cpe:2.3:a:fetchmail:fetchmail:6.0.0:*:*:*:*:*:*:*6.0.0Vulnerablefetchmail
cpe:2.3:a:fetchmail:fetchmail:6.1.0:*:*:*:*:*:*:*6.1.0Vulnerablefetchmail
cpe:2.3:a:fetchmail:fetchmail:6.1.3:*:*:*:*:*:*:*6.1.3Vulnerablefetchmail
cpe:2.3:a:fetchmail:fetchmail:6.2.0:*:*:*:*:*:*:*6.2.0Vulnerablefetchmail
cpe:2.3:a:fetchmail:fetchmail:6.2.1:*:*:*:*:*:*:*6.2.1Vulnerablefetchmail
cpe:2.3:a:fetchmail:fetchmail:6.2.2:*:*:*:*:*:*:*6.2.2Vulnerablefetchmail
  • cpe:2.3:a:fetchmail:fetchmail:5.9.9:*:*:*:*:*:*:* Versions 5.9.9 Vulnerable ·fetchmail
  • cpe:2.3:a:fetchmail:fetchmail:5.9.10:*:*:*:*:*:*:* Versions 5.9.10 Vulnerable ·fetchmail
  • cpe:2.3:a:fetchmail:fetchmail:5.9.11:*:*:*:*:*:*:* Versions 5.9.11 Vulnerable ·fetchmail
  • cpe:2.3:a:fetchmail:fetchmail:5.9.13:*:*:*:*:*:*:* Versions 5.9.13 Vulnerable ·fetchmail
  • cpe:2.3:a:fetchmail:fetchmail:6.0.0:*:*:*:*:*:*:* Versions 6.0.0 Vulnerable ·fetchmail
  • cpe:2.3:a:fetchmail:fetchmail:6.1.0:*:*:*:*:*:*:* Versions 6.1.0 Vulnerable ·fetchmail
  • cpe:2.3:a:fetchmail:fetchmail:6.1.3:*:*:*:*:*:*:* Versions 6.1.3 Vulnerable ·fetchmail
  • cpe:2.3:a:fetchmail:fetchmail:6.2.0:*:*:*:*:*:*:* Versions 6.2.0 Vulnerable ·fetchmail
  • cpe:2.3:a:fetchmail:fetchmail:6.2.1:*:*:*:*:*:*:* Versions 6.2.1 Vulnerable ·fetchmail
  • cpe:2.3:a:fetchmail:fetchmail:6.2.2:*:*:*:*:*:*:* Versions 6.2.2 Vulnerable ·fetchmail
Show 42 more CPE
CPEVersionsRoleVendor
cpe:2.3:a:fetchmail:fetchmail:6.2.3:*:*:*:*:*:*:*6.2.3Vulnerablefetchmail
cpe:2.3:a:fetchmail:fetchmail:6.2.4:*:*:*:*:*:*:*6.2.4Vulnerablefetchmail
cpe:2.3:a:fetchmail:fetchmail:6.2.5:*:*:*:*:*:*:*6.2.5Vulnerablefetchmail
cpe:2.3:a:fetchmail:fetchmail:6.2.5.1:*:*:*:*:*:*:*6.2.5.1Vulnerablefetchmail
cpe:2.3:a:fetchmail:fetchmail:6.2.5.2:*:*:*:*:*:*:*6.2.5.2Vulnerablefetchmail
cpe:2.3:a:fetchmail:fetchmail:6.2.5.4:*:*:*:*:*:*:*6.2.5.4Vulnerablefetchmail
cpe:2.3:a:fetchmail:fetchmail:6.2.6:pre4:*:*:*:*:*:*6.2.6 pre4Vulnerablefetchmail
cpe:2.3:a:fetchmail:fetchmail:6.2.6:pre8:*:*:*:*:*:*6.2.6 pre8Vulnerablefetchmail
cpe:2.3:a:fetchmail:fetchmail:6.2.6:pre9:*:*:*:*:*:*6.2.6 pre9Vulnerablefetchmail
cpe:2.3:a:fetchmail:fetchmail:6.2.9:rc10:*:*:*:*:*:*6.2.9 rc10Vulnerablefetchmail
cpe:2.3:a:fetchmail:fetchmail:6.2.9:rc3:*:*:*:*:*:*6.2.9 rc3Vulnerablefetchmail
cpe:2.3:a:fetchmail:fetchmail:6.2.9:rc4:*:*:*:*:*:*6.2.9 rc4Vulnerablefetchmail
cpe:2.3:a:fetchmail:fetchmail:6.2.9:rc5:*:*:*:*:*:*6.2.9 rc5Vulnerablefetchmail
cpe:2.3:a:fetchmail:fetchmail:6.2.9:rc7:*:*:*:*:*:*6.2.9 rc7Vulnerablefetchmail
cpe:2.3:a:fetchmail:fetchmail:6.2.9:rc8:*:*:*:*:*:*6.2.9 rc8Vulnerablefetchmail
cpe:2.3:a:fetchmail:fetchmail:6.2.9:rc9:*:*:*:*:*:*6.2.9 rc9Vulnerablefetchmail
cpe:2.3:a:fetchmail:fetchmail:6.3.0:*:*:*:*:*:*:*6.3.0Vulnerablefetchmail
cpe:2.3:a:fetchmail:fetchmail:6.3.1:*:*:*:*:*:*:*6.3.1Vulnerablefetchmail
cpe:2.3:a:fetchmail:fetchmail:6.3.2:*:*:*:*:*:*:*6.3.2Vulnerablefetchmail
cpe:2.3:a:fetchmail:fetchmail:6.3.3:*:*:*:*:*:*:*6.3.3Vulnerablefetchmail
cpe:2.3:a:fetchmail:fetchmail:6.3.4:*:*:*:*:*:*:*6.3.4Vulnerablefetchmail
cpe:2.3:a:fetchmail:fetchmail:6.3.5:*:*:*:*:*:*:*6.3.5Vulnerablefetchmail
cpe:2.3:a:fetchmail:fetchmail:6.3.6:*:*:*:*:*:*:*6.3.6Vulnerablefetchmail
cpe:2.3:a:fetchmail:fetchmail:6.3.6:rc1:*:*:*:*:*:*6.3.6 rc1Vulnerablefetchmail
cpe:2.3:a:fetchmail:fetchmail:6.3.6:rc2:*:*:*:*:*:*6.3.6 rc2Vulnerablefetchmail
cpe:2.3:a:fetchmail:fetchmail:6.3.6:rc3:*:*:*:*:*:*6.3.6 rc3Vulnerablefetchmail
cpe:2.3:a:fetchmail:fetchmail:6.3.6:rc4:*:*:*:*:*:*6.3.6 rc4Vulnerablefetchmail
cpe:2.3:a:fetchmail:fetchmail:6.3.6:rc5:*:*:*:*:*:*6.3.6 rc5Vulnerablefetchmail
cpe:2.3:a:fetchmail:fetchmail:6.3.7:*:*:*:*:*:*:*6.3.7Vulnerablefetchmail
cpe:2.3:a:fetchmail:fetchmail:6.3.8:*:*:*:*:*:*:*6.3.8Vulnerablefetchmail
cpe:2.3:a:fetchmail:fetchmail:6.3.9:*:*:*:*:*:*:*6.3.9Vulnerablefetchmail
cpe:2.3:a:fetchmail:fetchmail:6.3.9:rc2:*:*:*:*:*:*6.3.9 rc2Vulnerablefetchmail
cpe:2.3:a:fetchmail:fetchmail:6.3.10:*:*:*:*:*:*:*6.3.10Vulnerablefetchmail
cpe:2.3:a:fetchmail:fetchmail:6.3.11:*:*:*:*:*:*:*6.3.11Vulnerablefetchmail
cpe:2.3:a:fetchmail:fetchmail:6.3.12:*:*:*:*:*:*:*6.3.12Vulnerablefetchmail
cpe:2.3:a:fetchmail:fetchmail:6.3.13:*:*:*:*:*:*:*6.3.13Vulnerablefetchmail
cpe:2.3:a:fetchmail:fetchmail:6.3.14:*:*:*:*:*:*:*6.3.14Vulnerablefetchmail
cpe:2.3:a:fetchmail:fetchmail:6.3.15:*:*:*:*:*:*:*6.3.15Vulnerablefetchmail
cpe:2.3:a:fetchmail:fetchmail:6.3.16:*:*:*:*:*:*:*6.3.16Vulnerablefetchmail
cpe:2.3:a:fetchmail:fetchmail:6.3.17:*:*:*:*:*:*:*6.3.17Vulnerablefetchmail
cpe:2.3:a:fetchmail:fetchmail:6.3.18:*:*:*:*:*:*:*6.3.18Vulnerablefetchmail
cpe:2.3:a:fetchmail:fetchmail:6.3.19:*:*:*:*:*:*:*6.3.19Vulnerablefetchmail
  • cpe:2.3:a:fetchmail:fetchmail:6.2.3:*:*:*:*:*:*:* Versions 6.2.3 Vulnerable ·fetchmail
  • cpe:2.3:a:fetchmail:fetchmail:6.2.4:*:*:*:*:*:*:* Versions 6.2.4 Vulnerable ·fetchmail
  • cpe:2.3:a:fetchmail:fetchmail:6.2.5:*:*:*:*:*:*:* Versions 6.2.5 Vulnerable ·fetchmail
  • cpe:2.3:a:fetchmail:fetchmail:6.2.5.1:*:*:*:*:*:*:* Versions 6.2.5.1 Vulnerable ·fetchmail
  • cpe:2.3:a:fetchmail:fetchmail:6.2.5.2:*:*:*:*:*:*:* Versions 6.2.5.2 Vulnerable ·fetchmail
  • cpe:2.3:a:fetchmail:fetchmail:6.2.5.4:*:*:*:*:*:*:* Versions 6.2.5.4 Vulnerable ·fetchmail
  • cpe:2.3:a:fetchmail:fetchmail:6.2.6:pre4:*:*:*:*:*:* Versions 6.2.6 pre4 Vulnerable ·fetchmail
  • cpe:2.3:a:fetchmail:fetchmail:6.2.6:pre8:*:*:*:*:*:* Versions 6.2.6 pre8 Vulnerable ·fetchmail
  • cpe:2.3:a:fetchmail:fetchmail:6.2.6:pre9:*:*:*:*:*:* Versions 6.2.6 pre9 Vulnerable ·fetchmail
  • cpe:2.3:a:fetchmail:fetchmail:6.2.9:rc10:*:*:*:*:*:* Versions 6.2.9 rc10 Vulnerable ·fetchmail
  • cpe:2.3:a:fetchmail:fetchmail:6.2.9:rc3:*:*:*:*:*:* Versions 6.2.9 rc3 Vulnerable ·fetchmail
  • cpe:2.3:a:fetchmail:fetchmail:6.2.9:rc4:*:*:*:*:*:* Versions 6.2.9 rc4 Vulnerable ·fetchmail
  • cpe:2.3:a:fetchmail:fetchmail:6.2.9:rc5:*:*:*:*:*:* Versions 6.2.9 rc5 Vulnerable ·fetchmail
  • cpe:2.3:a:fetchmail:fetchmail:6.2.9:rc7:*:*:*:*:*:* Versions 6.2.9 rc7 Vulnerable ·fetchmail
  • cpe:2.3:a:fetchmail:fetchmail:6.2.9:rc8:*:*:*:*:*:* Versions 6.2.9 rc8 Vulnerable ·fetchmail
  • cpe:2.3:a:fetchmail:fetchmail:6.2.9:rc9:*:*:*:*:*:* Versions 6.2.9 rc9 Vulnerable ·fetchmail
  • cpe:2.3:a:fetchmail:fetchmail:6.3.0:*:*:*:*:*:*:* Versions 6.3.0 Vulnerable ·fetchmail
  • cpe:2.3:a:fetchmail:fetchmail:6.3.1:*:*:*:*:*:*:* Versions 6.3.1 Vulnerable ·fetchmail
  • cpe:2.3:a:fetchmail:fetchmail:6.3.2:*:*:*:*:*:*:* Versions 6.3.2 Vulnerable ·fetchmail
  • cpe:2.3:a:fetchmail:fetchmail:6.3.3:*:*:*:*:*:*:* Versions 6.3.3 Vulnerable ·fetchmail
  • cpe:2.3:a:fetchmail:fetchmail:6.3.4:*:*:*:*:*:*:* Versions 6.3.4 Vulnerable ·fetchmail
  • cpe:2.3:a:fetchmail:fetchmail:6.3.5:*:*:*:*:*:*:* Versions 6.3.5 Vulnerable ·fetchmail
  • cpe:2.3:a:fetchmail:fetchmail:6.3.6:*:*:*:*:*:*:* Versions 6.3.6 Vulnerable ·fetchmail
  • cpe:2.3:a:fetchmail:fetchmail:6.3.6:rc1:*:*:*:*:*:* Versions 6.3.6 rc1 Vulnerable ·fetchmail
  • cpe:2.3:a:fetchmail:fetchmail:6.3.6:rc2:*:*:*:*:*:* Versions 6.3.6 rc2 Vulnerable ·fetchmail
  • cpe:2.3:a:fetchmail:fetchmail:6.3.6:rc3:*:*:*:*:*:* Versions 6.3.6 rc3 Vulnerable ·fetchmail
  • cpe:2.3:a:fetchmail:fetchmail:6.3.6:rc4:*:*:*:*:*:* Versions 6.3.6 rc4 Vulnerable ·fetchmail
  • cpe:2.3:a:fetchmail:fetchmail:6.3.6:rc5:*:*:*:*:*:* Versions 6.3.6 rc5 Vulnerable ·fetchmail
  • cpe:2.3:a:fetchmail:fetchmail:6.3.7:*:*:*:*:*:*:* Versions 6.3.7 Vulnerable ·fetchmail
  • cpe:2.3:a:fetchmail:fetchmail:6.3.8:*:*:*:*:*:*:* Versions 6.3.8 Vulnerable ·fetchmail
  • cpe:2.3:a:fetchmail:fetchmail:6.3.9:*:*:*:*:*:*:* Versions 6.3.9 Vulnerable ·fetchmail
  • cpe:2.3:a:fetchmail:fetchmail:6.3.9:rc2:*:*:*:*:*:* Versions 6.3.9 rc2 Vulnerable ·fetchmail
  • cpe:2.3:a:fetchmail:fetchmail:6.3.10:*:*:*:*:*:*:* Versions 6.3.10 Vulnerable ·fetchmail
  • cpe:2.3:a:fetchmail:fetchmail:6.3.11:*:*:*:*:*:*:* Versions 6.3.11 Vulnerable ·fetchmail
  • cpe:2.3:a:fetchmail:fetchmail:6.3.12:*:*:*:*:*:*:* Versions 6.3.12 Vulnerable ·fetchmail
  • cpe:2.3:a:fetchmail:fetchmail:6.3.13:*:*:*:*:*:*:* Versions 6.3.13 Vulnerable ·fetchmail
  • cpe:2.3:a:fetchmail:fetchmail:6.3.14:*:*:*:*:*:*:* Versions 6.3.14 Vulnerable ·fetchmail
  • cpe:2.3:a:fetchmail:fetchmail:6.3.15:*:*:*:*:*:*:* Versions 6.3.15 Vulnerable ·fetchmail
  • cpe:2.3:a:fetchmail:fetchmail:6.3.16:*:*:*:*:*:*:* Versions 6.3.16 Vulnerable ·fetchmail
  • cpe:2.3:a:fetchmail:fetchmail:6.3.17:*:*:*:*:*:*:* Versions 6.3.17 Vulnerable ·fetchmail
  • cpe:2.3:a:fetchmail:fetchmail:6.3.18:*:*:*:*:*:*:* Versions 6.3.18 Vulnerable ·fetchmail
  • cpe:2.3:a:fetchmail:fetchmail:6.3.19:*:*:*:*:*:*:* Versions 6.3.19 Vulnerable ·fetchmail

Remediation

No fixed version listed by the sources yet.

Vendor assessments

Red Hat

Red Hat rating: Low. Red Hat's page for this CVE →

ProductStatusPlan or fix
Red Hat Enterprise Linux 4AffectedNo fix planned: Will not fix
Red Hat Enterprise Linux 5AffectedNo fix planned: Will not fix
Red Hat Enterprise Linux 6AffectedNo fix planned: Will not fix

Timeline

  1. 2026-10-02 Threatist record created from CVE-2011-1947
  2. 2026-10-03 Alias added: GHSA-xrcr-j9jp-xv96

References

Advisory 4

Other 6

  • TI-2001-00964 Fetchmail (aka fetchmail-ssl) before 5.8.17 allows a remote malicious (1) IMAP server or… CVSS 2.0HIGH 10.0
  • TI-2001-00101 Vulnerability in fetchmail 5.5.0-2 and earlier in the AUTHENTICATE GSSAPI command. CVSS 2.0HIGH 10.0
  • TI-2001-00782 A buffer overflow in Linux fetchmail before 5.8.6 allows remote attackers to execute… CVSS 2.0HIGH 7.5
  • TI-2006-05756 fetchmail 6.3.5 and 6.3.6 before 6.3.6-rc4, when refusing a message delivered via the mda… CVSS 2.0HIGH 7.8
  • TI-2006-05650 fetchmail before 6.3.6-rc4 does not properly enforce TLS and may transmit cleartext… CVSS 2.0HIGH 7.8
  • TI-2002-01289 Heap-based buffer overflow in Fetchmail 6.1.3 and earlier does not account for the "@"… CVSS 2.0HIGH 7.5
See all 23 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences