CVE-2009-5111: GoAhead WebServer allows remote attackers to cause a denial of service (daemon outage) via partial HTTP reques

Routine

MEDIUM 5.0MITIGATE

CVE-2009-5111 is a medium-severity flaw (CVSS 5.0) affecting goahead webserver. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

GoAhead WebServer allows remote attackers to cause a denial of service (daemon outage) via partial HTTP requests, as demonstrated by Slowloris.

Why this priority

No elevated risk signals yet

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	5.0 (Medium)
EPSS exploit chance	1.1% (top 34%)
CISA exploited list	No
Weakness	CWE-399
Published	2011-12-27
Last modified	2026-06-16

Publisher (CNA): MITRE · Vendor: goahead

Last updated 2026-06-16 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2011-12-27 18:55 UTCPublished CVE record published
2026-06-16 23:15 UTCUpdated Record last modified

goahead goahead webserver MITIGATE

Affected: all versions

Fixed in: no fixed release known

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy goahead-webserver || rpm -q goahead-webserver || goahead-webserver --version

No fixed or unaffected release known

Apply the vendor mitigation from the advisory, disable the affected feature, or restrict network access.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2009-5111?

goahead webserver: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2009-5111 being exploited?

CVE-2009-5111 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2009-5111 affect?

CVE-2009-5111 affects goahead webserver. Severity is medium (CVSS 5.0). GoAhead WebServer allows remote attackers to cause a denial of service (daemon outage) via partial HTTP requests, as demonstrated by Slowloris.

How urgent is CVE-2009-5111?

Priority 34/100. No elevated risk signals yet.

Related CVEs

CVE-2011-4273 MEDIUM 4.3 DOWNGRADE Multiple cross-site scripting (XSS) vulnerabilities in GoAhead Webserver 2.18 allow remote attackers to inject
CVE-2007-6702 MEDIUM 5.0 MITIGATE MITIGATE goform/QuickStart_c0 on the GoAhead Web Server on the FS4104-AW (aka rooter) VDSL device contains a password i
CVE-2003-1569 MEDIUM 5.0 UPGRADE GoAhead WebServer before 2.1.5 on Windows 95, 98, and ME allows remote attackers to cause a denial of service
CVE-2003-1568 MEDIUM 5.0 DOWNGRADE UPGRADE GoAhead WebServer before 2.1.6 allows remote attackers to cause a denial of service (NULL pointer dereference
CVE-2002-2431 HIGH 7.5 UPGRADE Unspecified vulnerability in GoAhead WebServer before 2.1.4 allows remote attackers to cause "incorrect behavi

References

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